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Journal articles on the topic 'Potassium oxides'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Novosyolov, A., I. Olianina, I. Novoselova, et al. "RESEARCH OF THE POSSIBILITY OF REDUCING THE CIRCULATION OF SULFUR OXIDE IN THE PRODUCTION OF WHITE CEMENT." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 6, no. 7 (2021): 89–98. http://dx.doi.org/10.34031/2071-7318-2021-6-7-89-98.

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The article discusses the possibility of reducing the circulation of sulfur oxide in the production of white cement by introducing alkaline potassium oxides K2O and sodium Na2O. A decrease in the circulation of sulfur oxide SO3 is achieved by increasing its yield in the clinker by transferring SO3 from a more sublimated compound of calcium sulfate CaSO4 to less sublimated potassium sulfates K2SO4 and sodium Na2SO4. Potassium and sodium oxides are introduced in the composition of carbonates and feldspar. The amount of introduced alkali oxides is controlled by the molar ratio A/S between sulfur

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2

JIANG, ZHI, HAIRONG ZHANG, ZHONGPENG WANG, MINGXIA CHEN, and WENFENG SHANGGUAN. "SIMULTANEOUSLY CATALYTIC REMOVAL OF NOx AND SOOT ON RARE EARTH ELEMENT OXIDE LOADED WITH POTASSIUM AND TRANSITION NANOSIZED METAL OXIDES." Nano 03, no. 04 (2008): 239–44. http://dx.doi.org/10.1142/s1793292008001088.

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The simultaneous catalytic removal of NO x and soot over the rare earth element (REE) oxide-based mixture oxides loaded with potassium and transition nanosized metal oxide (designated as M/K/REE oxide) was investigated by using temperature-programmed reaction (TPR). The influence of the type of REE oxides together with the type and amount of transitional metal oxides on the catalytic removal activity was discussed. K / Nd 2 O 3 was found to be the most active oxide among the REE oxides to simultaneous remove the NO x and soot under lean conditions. Chromium oxide was more active than the other

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3

Lendzion-Bieluń, Zofia, Rafał Pelka, and Łukasz Czekajło. "Characterization of FeCo based catalyst for ammonia decomposition. The effect of potassium oxide." Polish Journal of Chemical Technology 16, no. 4 (2014): 111–16. http://dx.doi.org/10.2478/pjct-2014-0080.

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Abstract FeCo fused catalyst was obtained by fusing iron and cobalt oxides with an addition of calcium, aluminium, and potassium oxides (CaO, Al2O3, K2O). An additional amount of potassium oxide was inserted by wet impregnation. Chemical composition of the prepared catalysts was determined with an aid of the XRF method. On the basis of XRD analysis it was found that cobalt was built into the structure of magnetite and solid solution of CoFe2O4 was formed. An increase in potassium content develops surface area of the reduced form of the catalyst, number of adsorption sites for hydrogen, and the

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4

Black, DSC, and RJ Strauch. "Nitrones and Oxaziridines. XXXVII. Some Oxidation Reactions of 1-Pyrroline 1-Oxides." Australian Journal of Chemistry 41, no. 2 (1988): 183. http://dx.doi.org/10.1071/ch9880183.

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The 2,4-diaryl-1-pyrroline 1-oxides (4) can be converted into the related 2H-pyrrole 1-oxides (5) by treatment with N-bromosuccinimide and anhydrous potassium carbonate. Similar treatment of the 1-pyrroline 1-oxide (6) yielded the succinimido-substituted pyrroline (7). Selenium dioxide oxidation of the tetramethyl nitrone (8) under various conditions gave mixtures containing the compounds (10)-(12). Neither process provides a general conversion of 1-pyrroline 1-oxides into 2H-pyrrole 1-oxides.

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5

Makarov, V. A., and T. K. Savosteenko. "Determination of the mass fraction of potassium and sodium oxides in the dust of electric furnace filters by atomic emission spectrometry with inductively coupled plasma." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 3 (October 20, 2020): 62–66. http://dx.doi.org/10.21122/1683-6065-2020-3-62-66.

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A method of measuring the mass fraction of potassium and sodium oxides in the dust filters of electric arc furnaces by atomic emission spectrometry with the inductively coupled plasma (AES-ICP) was developed. Possibilities of atomic emission spectrometers of iCAP series for determination of potassium and sodium in dust of filters of electric arc furnaces are investigated.A method for converting potassium and sodium oxides into solution is proposed. Calibration of the spectrometer was carried out on aqueous solutions with a known concentration of potassium and sodium. For the preparation of cal

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6

Šilhánková, Alexandra, Jana Hulvová, Petr Trška, and Miloslav Ferles. "Condensation reactions of 2,4- and 2,6-dimethylpyridines and their 1-oxides." Collection of Czechoslovak Chemical Communications 54, no. 6 (1989): 1687–704. http://dx.doi.org/10.1135/cccc19891687.

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Using the reactions of 2,4- and 2,6-dimethylpyridine-1-oxides with aromatic and heteroaromatic aldehydes under catalysis with potassium tert-butoxide (E)-aryl- and (E)-heteroarylethenylpyridine-1-oxides IIIa-IIIe, IVa-IVc, Va, Vb respectively, were prepared. 1-Oxides IIIg, IVd, IVe and Vc were obtained from the appropriate pyridine bases by oxidation with peracetic acid. Condensation of 2,4- and 2,6-dimethylpyridines with 3-pyridinecarbaldehyde gives a mixture of bases VIa and VIc, and VIb and VId, respectively. On Claisen condensation of 2,6- or 2,4-dimethylpyridine-1-oxide with diethyl oxala

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7

Ando, Kazushi, Shinji Tamura, and Nobuhito Imanaka. "Potassium ion conductivity of KNO2 mixed oxides." Journal of Alloys and Compounds 408-412 (February 2006): 657–60. http://dx.doi.org/10.1016/j.jallcom.2004.12.067.

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8

Kalinina, M. I., O. A. Rakitin, L. F. Chertanova, L. I. Khmel'nitskii, and I. K. Moiseev. "Reaction of ?-hydroxyiminoacetonitrile oxides with potassium thiocyanate." Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 40, no. 4 (1991): 784–88. http://dx.doi.org/10.1007/bf00958574.

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9

Ding, Keqiang. "Hydrothermal Synthesis of Leaf-Shaped Ferric Oxide Particles." E-Journal of Chemistry 6, s1 (2009): S280—S286. http://dx.doi.org/10.1155/2009/389765.

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For the first time, leaf-shaped ferric oxide particles were prepared from an aqueous solution of potassium ferricyanide [K3Fe(CN)6] by hydrothermal process. Images obtained from SEM (scanning electron microscope) revealed that leaf-shaped ferric oxides (around 1.5 μm in length) were clearly exhibited when the hydrothermal tempreature was 150°C, while as the temperature was increased to 200°C leaf-shaped ferric oxide particles with larger size were observed. XRD (X-ray diffraction) patterns testified that the obtained ferric oxides were α-Fe2O3with well-structured crystal faces. Interestingly,

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10

Sinha, M. M., and Anupamdeep Sharma. "Phonon spectra of superionic sodium and potassium oxides." Solid State Ionics 225 (October 2012): 211–13. http://dx.doi.org/10.1016/j.ssi.2012.04.005.

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11

Othman, M. R., Che Martunus, and W. J. N. Fernando. "Synthetic Hydrotalcite Prepared from Modified Combustion Method Using Glucose as Fuel." Advanced Materials Research 173 (December 2010): 146–49. http://dx.doi.org/10.4028/www.scientific.net/amr.173.146.

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Hydrotalcite (HT) like compounds were successfully synthesized from combustion method using aluminum and magnesium nitrates, and potassium carbonate as solid precursors. Glucose was used as solid fuel to facilitate the reaction into mixed oxide and later HT structure at different combustion temperature. The combusted product initially formed disordered mixed oxides, but later returned to its original, more ordered HT state after being in contact with carbonate solution as analyzed from XRD. SEM analysis showed that the sample's microstructure was more orderly packed, less granular and more ref

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12

Wu, Lei, Kai Luo, Ling Zhang, Kai Wei та Wen-Chao Yang. "Latent Radical Cleavage of α-Allenylic C–O Bonds: Potassium Persulfate Mediated Thiolation of Allenylphosphine Oxides". Synthesis 50, № 15 (2018): 2990–98. http://dx.doi.org/10.1055/s-0037-1609835.

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A novel potassium persulfate (K2S2O8) mediated thiolation of allenylphosphine oxides with diaryl sulfides is disclosed. Mechanistic studies indicate that K2S2O8 homolyzes the diaryl sulfide to produce a thiyl radical (PhS•), which is followed by C–O bond cleavage of the allenylphosphine oxide under metal-free conditions, affording novel S,P-bifunctionalized butadienes in moderate to excellent yields.

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13

Hirano, Takenori. "Dehydrogenation of ethylbenzene over potassium-promoted iron oxide containing cerium and molybdenum oxides." Applied Catalysis 28 (December 1986): 119–32. http://dx.doi.org/10.1016/s0166-9834(00)82497-5.

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14

Tian, Zhaohui, Lijun Song, and Xinmin Li. "Effect of Oxidizing Decontamination Process on Corrosion Property of 304L Stainless Steel." International Journal of Corrosion 2019 (August 1, 2019): 1–6. http://dx.doi.org/10.1155/2019/1206098.

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Corrosion behaviors of 304L stainless steel (SS) and 304L SS with oxides film (preoxidation 304L SS) in 1 g/L potassium permanganate solution of various pH values were investigated by using mass loss, electrochemical measurement and scanning electron microscope (SEM) observation. The results showed that mass loss of 304L SS increases with the increase of sodium hydroxide or nitric acid concentration in 1 g/L potassium permanganate solution. The polarization curves of 304L SS in potassium permanganate solution show that passive zones are destroyed more easily in acid potassium permanganate solu

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15

Maślankiewicz, Andrzej, and Maria J. Maslankiewicz. "Reactions of Some Dithiinodiquinoline 7-Oxides with Potassium Phenoxide." HETEROCYCLES 71, no. 1 (2007): 175. http://dx.doi.org/10.3987/com-06-10922.

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16

El-Shobaky, G. A., K. A. El-Barawy, and A. A. Ibrahim. "Thermal solid-solid interaction between potassium and manganese oxides." Thermochimica Acta 102 (June 1986): 21–27. http://dx.doi.org/10.1016/0040-6031(86)85309-6.

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17

Saber, John M., John L. Falconer, and Lee F. Brown. "Interaction of potassium carbonate with surface oxides of carbon." Fuel 65, no. 10 (1986): 1356–59. http://dx.doi.org/10.1016/0016-2361(86)90103-1.

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18

Zhu, Qing, Zeyu Jiang, Mudi Ma та ін. "Revealing the unexpected promotion effect of diverse potassium precursors on α-MnO2 for the catalytic destruction of toluene". Catalysis Science & Technology 10, № 7 (2020): 2100–2110. http://dx.doi.org/10.1039/c9cy02347j.

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19

DeLaHunt, John S., and Theodore G. Lindeman. "Review of the safety of potassium and potassium oxides, including deactivation by introduction into water." Journal of Chemical Health and Safety 14, no. 2 (2007): 21–32. http://dx.doi.org/10.1016/j.jchas.2006.09.010.

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20

Jirátová, Květa, Kateřina Pacultová, Kateřina Karásková, Jana Balabánová, Martin Koštejn, and Lucie Obalová. "Direct Decomposition of NO over Co-Mn-Al Mixed Oxides: Effect of Ce and/or K Promoters." Catalysts 10, no. 7 (2020): 808. http://dx.doi.org/10.3390/catal10070808.

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Co-Mn-Al mixed oxides promoted by potassium are known as active catalysts for the direct decomposition of nitric oxide (NO). In this study, the answer to the following question has been considered: does the presence of cerium in K-promoted Co-Mn-Al catalysts substantially affect the physical-chemical properties, activity, and stability in direct NO decomposition? The Co-Mn-Al, Co-Mn-Al-Ce, and Co-Mn-Al-Ce-K mixed oxide catalysts were prepared by the precipitation of corresponding metal nitrates with a solution of Na2CO3/NaOH, followed by the washing of the precipitate and calcination. Two othe

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21

Hirano, Takenori. "Dehydrogenation of Ethylbenzene on Potassium-Promoted Iron Oxide Catalysts Containing Various Transition Metal Oxides." Bulletin of the Chemical Society of Japan 59, no. 5 (1986): 1653–55. http://dx.doi.org/10.1246/bcsj.59.1653.

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22

NAKAGAWA, Hiroshi, and Yoichi ONO. "Effects of potassium chloride on the reduction of iron oxides." Transactions of the Iron and Steel Institute of Japan 25, no. 10 (1985): 1021–24. http://dx.doi.org/10.2355/isijinternational1966.25.1021.

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23

Ye-Xin, ZHANG, SU Qing-Yun, WANG Zhong-Peng, GAO Xi-Yan, and ZHANG Zhao-Liang. "Surface Modification of Mg-Al Hydrotalcite Mixed Oxides with Potassium." Acta Physico-Chimica Sinica 26, no. 04 (2010): 921–26. http://dx.doi.org/10.3866/pku.whxb20100446.

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24

Tang, Horng-Yi, Hsiao-Yun Lin, Ming-Jye Wang, et al. "Crystallization and Anisotropic Properties of Water-Stabilized Potassium Cobalt Oxides." Chemistry of Materials 17, no. 8 (2005): 2162–64. http://dx.doi.org/10.1021/cm047707v.

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25

KALININA, M. I., O. A. RAKITIN, L. F. CHERTANOVA, L. I. KHMEL'NITSKII та I. K. MOISEEV. "ChemInform Abstract: Reaction of α-Oximinoacetonitrile Oxides with Potassium Rhodanide." ChemInform 23, № 44 (2010): no. http://dx.doi.org/10.1002/chin.199244078.

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26

Birkner, Nancy, and Alexandra Navrotsky. "Thermodynamics of manganese oxides: Sodium, potassium, and calcium birnessite and cryptomelane." Proceedings of the National Academy of Sciences 114, no. 7 (2017): E1046—E1053. http://dx.doi.org/10.1073/pnas.1620427114.

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Manganese oxides with layer and tunnel structures occur widely in nature and inspire technological applications. Having variable compositions, these structures often are found as small particles (nanophases). This study explores, using experimental thermochemistry, the role of composition, oxidation state, structure, and surface energy in the their thermodynamic stability. The measured surface energies of cryptomelane, sodium birnessite, potassium birnessite and calcium birnessite are all significantly lower than those of binary manganese oxides (Mn3O4, Mn2O3, and MnO2), consistent with added

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27

Neal, C. "The mineralogy and chemistry of fine-grained sediments, Morphou Bay, Cyprus." Hydrology and Earth System Sciences 6, no. 5 (2002): 819–31. http://dx.doi.org/10.5194/hess-6-819-2002.

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Abstract. The mineralogy and chemistry of the less than 20μm fraction of marine sediments at Morphou Bay, north-west Cyprus, are presented to characterise fine-grained sediment supplies from basic and ultrabasic rocks of the Troodos Massif within a typological setting. The sediments comprise a mixture of smectite, illite, kaolinite and iron rich chlorite. They also contain amorphous iron oxides/hydroxides, calcite (with some magnesium substitution for calcium) and an amphibole. Spatial patterns in mineralogy occur: the near-shore sediments are rich in smectite, chlorite, amphibole and amorphou

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28

Anaekwe, Nicholas Ogbonna, and Yusuf Mi kailu Hassan. "Chemical Evaluation of the Glass Making Potentials of Silica Sand Deposits Along Cross River in Cross River State, South–East of Nigeria." European Journal of Engineering Research and Science 2, no. 6 (2017): 12. http://dx.doi.org/10.24018/ejers.2017.2.6.330.

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Analytical techniques such as X–ray Fluorescence Spectroscopy (XRF) and Atomic Absorption Spectroscopy (AAS) coupled with statistical package for multivariate analyses were used to characterize silica sand deposit obtained along Cross River in Cross River State, South Eastern Nigeria. Samples were collected from five locations along the river which include: Ikom-Okuni, Obubra-Ofumbogha, Abi-Ediba, Biase-Agwagune and Etung-Effraya. The results of analyses revealed that silicon dioxide (SiO2) forms the predominant metal oxide in the entire samples followed by iron oxides (Fe203), sodium oxide (N

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29

Peck, Torin C., Charles A. Roberts, and Gunugunuri K. Reddy. "Contrasting Effects of Potassium Addition on M3O4 (M = Co, Fe, and Mn) Oxides during Direct NO Decomposition Catalysis." Catalysts 10, no. 5 (2020): 561. http://dx.doi.org/10.3390/catal10050561.

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While the promotional effect of potassium on Co3O4 NO decomposition catalytic performance is established in the literature, it remains unknown if K is also a promoter of NO decomposition over similar simple first-row transition metal spinels like Mn3O4 and Fe3O4. Thus, potassium was impregnated (0.9–3.0 wt.%) on Co3O4, Mn3O4, and Fe3O4 and evaluated for NO decomposition reactivity from 400–650 °C. The activity of Co3O4 was strongly dependent on the amount of potassium present, with a maximum of ~0.18 [(µmol NO to N2) g−1 s−1] at 0.9 wt.% K. Without potassium, Fe3O4 exhibited deactivation with

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30

Liu, Ning, Zhimin Wu, Meng Li, et al. "A novel strategy for constructing mesoporous solid superbase catalysts: bimetallic Al–La oxides supported on SBA-15 modified with KF." Catalysis Science & Technology 7, no. 3 (2017): 725–33. http://dx.doi.org/10.1039/c6cy02334g.

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31

Wang, Xiaozhe, Zhiwu Yan, Rongrong Wang, Donghui Liu, Jianliang Zhang, and Zhengjian Liu. "Study of the enrichment characteristics of sinter by alkali metal vapors." Metallurgical Research & Technology 115, no. 3 (2018): 310. http://dx.doi.org/10.1051/metal/2018014.

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The existence forms and distributions of potassium (K) and sodium (Na) in sinter were studied by simulating the actual situations of K and Na cycle and enrichment in the blast furnace (BF). The results show that the K and Na vapor reacted with the main phase of the sinter and formed two “enrichment layers” in periphery, then the sinter samples were analyzed by means of XRD and SEM. The analysis results indicate that the main phases in light “enrichment layer” are K and Na compounds (ferrite, silicates and aluminates), iron oxide (Fe2O3) and silico-ferrite of calcium and aluminum (SFCA); while

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32

Fuller, MW, KMF Lebrocq, E. Leslie, and IR Wilson. "The Photolysis of Aqueous-Solutions of Potassium Hexacyanoferrate(III)." Australian Journal of Chemistry 39, no. 9 (1986): 1411. http://dx.doi.org/10.1071/ch9861411.

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The photolysis of aqueous solutions of potassium hexacyanoferrate(III) at 254 and 366 nm forms aqua- or hydroxo-pentacyanoferrate(III) in both acidic and alkaline solutions, with quantum yields between 0.02 and 0.06. Subsequent thermal reactions form the decacyanodiferrate(III) and/or decacyanodiferrate(III,II) species, especially in weakly acidic solutions, and, in alkaline solutions, may precipitate hydrated iron(III) oxides.

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33

Stephens, David E., Johant Lakey-Beitia, Jessica E. Burch, Hadi D. Arman, and Oleg V. Larionov. "Mechanistic insights into the potassium tert-butoxide-mediated synthesis of N-heterobiaryls." Chemical Communications 52, no. 64 (2016): 9945–48. http://dx.doi.org/10.1039/c6cc04816a.

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34

Karásková, Kateřina, Kateřina Pacultová, Anna Klegova, et al. "Magnesium Effect in K/Co-Mg-Mn-Al Mixed Oxide Catalyst for Direct NO Decomposition." Catalysts 10, no. 8 (2020): 931. http://dx.doi.org/10.3390/catal10080931.

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Emission of nitric oxide represents a serious environmental problem since it contributes to the formation of acid rain and photochemical smog. Potassium-modified Co-Mn-Al mixed oxide is an effective catalyst for NO decomposition. However, there are problems related to the thermal instability of potassium species and a high content of toxic and expensive cobalt. The reported research aimed to determine whether these shortcomings can be overcome by replacing cobalt with magnesium. Therefore, a series of Co-Mg-Mn-Al mixed oxides with different Co/Mg molar ratio and promoted by various content of

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35

Roupcová, Petra, Karel Klouda, Markéta Weisheitelová, and Bohdan Filipi. "Preparation of Material Based on Biochar - MnOx, Its Morphology, Thermal Stability and Phytotoxicity." TRANSACTIONS of the VŠB – Technical University of Ostrava, Safety Engineering Series 13, no. 1 (2018): 21–28. http://dx.doi.org/10.2478/tvsbses-2018-0004.

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Abstract By reducing potassium permanganate using various methods (microwave radiation, HCl, ethanol, ascorbic acid) in a biochar environment, we have prepared composites of manganese oxides and biochar as an electrode material for elements or supercapacitors. Once identified, the prepared products were tested for thermal stability and phytotoxicity as a safety parameter in case they get in contact with the natural environment. The publication had also discussed progression of thermal decomposition of the composite. The process was exo-thermal with mutual oxidation-reduction reaction between t

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36

Li, Mengli, Xing Li, Honghong Chang, Wenchao Gao, and Wenlong Wei. "Palladium-catalyzed direct C–H arylation of pyridine N-oxides with potassium aryl- and heteroaryltrifluoroborates." Organic & Biomolecular Chemistry 14, no. 8 (2016): 2421–26. http://dx.doi.org/10.1039/c5ob02409a.

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An efficient ligand-free Pd(OAc)<sub>2</sub>-catalyzed selective arylation of pyridine N-oxides using potassium (hetero)aryltrifluoroborates as coupling partners via C–H bond activation was achieved in the presence of TBAI.

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37

Zhang, Yunchang, Girish Kshirsagar, John E. Ellison, and James C. Cannon. "Catalytic effects of metal oxides on the decomposition of Potassium perchlorate." Thermochimica Acta 278 (May 1996): 119–27. http://dx.doi.org/10.1016/0040-6031(95)02793-9.

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38

Salem, S. M., and S. A. Tariq. "Molten potassium pyrosulphate: Reactions of oxides of ten main-group elements." Thermochimica Acta 307, no. 2 (1997): 123–25. http://dx.doi.org/10.1016/s0040-6031(97)00297-9.

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39

DOU, Zhe, Hai-jie ZHANG, Yan-fei PAN, and Xiu-feng XU. "Catalytic decomposition of N2O over potassium-modified Cu-Co spinel oxides." Journal of Fuel Chemistry and Technology 42, no. 2 (2014): 238–45. http://dx.doi.org/10.1016/s1872-5813(14)60016-5.

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40

Shimizu, Masahiro, Ryosuke Yatsuzuka, Taro Koya, Tomohiko Yamakami, and Susumu Arai. "Tin Oxides as a Negative Electrode Material for Potassium-Ion Batteries." ACS Applied Energy Materials 1, no. 12 (2018): 6865–70. http://dx.doi.org/10.1021/acsaem.8b01209.

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41

Tondys, Hanna, and Henk C. Van Der Plas. "Amination of 4-nitropyridazine 1-oxides by liquid ammonia/potassium permanganate." Journal of Heterocyclic Chemistry 23, no. 2 (1986): 621–23. http://dx.doi.org/10.1002/jhet.5570230263.

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42

Chen, Xiaopei, Fangfang Yang, Xiuling Cui, and Yangjie Wu. "Potassium Hydroxide-Catalyzed Alkynylation of Heteroaromatic N-Oxides with Terminal Alkynes." Advanced Synthesis & Catalysis 359, no. 22 (2017): 3922–26. http://dx.doi.org/10.1002/adsc.201700931.

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43

Yamamoto, Tatsuhiro, Kenji Kamishima, Koichi Kakizaki, and Nobuyuki Hiratsuka. "Preparation of novel potassium, lanthanum-iron oxides and their magnetic properties." Transactions of the Materials Research Society of Japan 37, no. 2 (2012): 271–74. http://dx.doi.org/10.14723/tmrsj.37.271.

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44

Vdovin, V. V., A. I. Edil’baev, V. A. Kozlov, et al. "Thermodynamic analysis of the reaction of vanadium oxides with oxides of sodium, potassium, calcium, barium, and manganese." Steel in Translation 37, no. 9 (2007): 787–91. http://dx.doi.org/10.3103/s096709120709015x.

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45

Liu, Shuilian, Jian Ji, Yi Yu, and Haibao Huang. "Facile synthesis of amorphous mesoporous manganese oxides for efficient catalytic decomposition of ozone." Catalysis Science & Technology 8, no. 16 (2018): 4264–73. http://dx.doi.org/10.1039/c8cy01111g.

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Amorphous mesoporous manganese oxides (MnO<sub>x</sub>) with different microstructures were synthesized via a facile redox method between manganese acetate and potassium permanganate by modulating the addition sequence of the precursors and directly used for catalytic decomposition of ozone.

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46

Giencke, Wolfgang. "Synthese neuer 2-Dichlormethylen-thiazolidinon-Derivate / Synthesis of New 2-Dichloromethylene-thiazolidinone Compounds." Zeitschrift für Naturforschung B 40, no. 5 (1985): 651–55. http://dx.doi.org/10.1515/znb-1985-0515.

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Abstract Starting from the 2-trichloromethyl-thiazolidinones 3 and 4 syntheses of the 2-dichloromethy-lene-4-thiazolidinones 5 and the corresponding 1-oxides, 6, 9 and 10 are described. The base used in these elimination reactions is potassium-1,2,4-triazole.

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47

Gálvez, Francisco, Marta Cabello, Pedro Lavela, Gregorio F. Ortiz, and José L. Tirado. "Sustainable and Environmentally Friendly Na and Mg Aqueous Hybrid Batteries Using Na and K Birnessites." Molecules 25, no. 4 (2020): 924. http://dx.doi.org/10.3390/molecules25040924.

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Sodium and magnesium batteries with intercalation electrodes are currently alternatives of great interest to lithium in stationary applications, such as distribution networks or renewable energies. Hydrated laminar oxides such as birnessites are an attractive cathode material for these batteries. Sodium and potassium birnessite samples have been synthesized by thermal and hydrothermal oxidation methods. Hybrid electrochemical cells have been built using potassium birnessite in aqueous sodium electrolyte, when starting in discharge and with a capacity slightly higher than 70 mA h g−1. Hydrother

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48

Black, DS, and KL Ooi. "Nitrones and Oxaziridines. XXXVI. Synthesis of Cyclic Thiohydroxamic Acids." Australian Journal of Chemistry 41, no. 1 (1988): 37. http://dx.doi.org/10.1071/ch9880037.

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2-Cyano-1-pyrroline 1-oxides (1) could not be converted directly into the related cyclic thiohydroxamic acids (8). Potassium ethyl xanthate transformed nitrones (1) into the imidates (2). The cyclic hydroxamic acids (4) can be converted into the thiohydroxamic acids (8) via the methoxypyrrolidinones (5) and the methoxypyrrolidine thiones (6), making use of sodium p- tolylmercaptide as the demethylating agent. Reaction of methoxy thiones (6) with trimethylsilyl iodide led to the formation of the 2-methylthio-1-pyrroline 1-oxides (7).

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49

Skidmore, T. A., and S. J. Milne. "Phase development during mixed-oxide processing of a [Na0.5K0.5NbO3]1−x–[LiTaO3]x powder." Journal of Materials Research 22, no. 8 (2007): 2265–72. http://dx.doi.org/10.1557/jmr.2007.0281.

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Powders of the solid lead-free piezoelectric ceramic solution [Na0.5K0.5NbO3]1−x–[LiTaO3]x, x = 0.06, were produced using a mixed-oxide process. Phase analysis indicated the formation of an orthorhombic solid solution at 800 °C, which coexisted with intermediate binary niobate and tantalate phases. A tetragonal main-phase solid solution was formed at ⩾950 °C, along with minor quantities of a tungsten bronze phase. Addition of 3 wt% excess alkali carbonates to the starting powders allowed the orthorhombic solid solution to be retained to 1100 °C and prevented formation of the secondary tungsten

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50

Perry, D. L., A. C. Thompson, R. E. Russo, X. L. Mao, and K. L. Chapman. "Characterization of Quaternary Metal Oxide Films by Synchrotron X-ray Fluorescence Microprobe." Applied Spectroscopy 51, no. 12 (1997): 1781–83. http://dx.doi.org/10.1366/0003702971939749.

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A synchrotron X-ray fluorescence microprobe has been used to study the composition and microstructure of pulsed-laser ablation-deposited films of calcium–nickel–potassium oxides that have applications in heterogeneous catalysis. The films, whose individual metal oxide components have widely varying boiling points and thus prevent a solid-phase synthesis with the use of standard thermal techniques, represent a new quaternary metal oxide phase containing the three elements. Experimental conditions for preparing the films are given. The X-ray fluorescence microprobe data are discussed with respec

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