- Anodic synthesis of Np(VII) compounds from acetate solutions
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A procedure was suggested for the synthesis of Np(VII) compounds by electrochemical oxidation in acetate solutions. The conditions for preparing compounds of type MNpO4·nH2O, where M is a singlecharged cation of alkali metals, ammonium, silver, guanidinium, or tetraalkylammonium, and of Np(VII) compounds with double-charged cations of alkaline-earth metals, Cu, Cd, and Zn were studied in detail. The compounds were characterized by chemical analysis and by IR and electronic spectroscopy. Pleiades Publishing, Inc., 2012.
- Fedoseev,Budantseva,Bessonov,Shilov
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- Synthesis and characterization of gel-derived barium hexa-aluminate
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Transparent barium hexa-aluminate gel was synthesized by chemical polymerization reactions involving commercial aluminium di(isopropoxide) acetoacetic ester and barium acetate. The gel was evaluated in terms of weight loss, thermal and crystallization cha
- Debsikdar
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- Preparation process of barium acetate
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The invention discloses a preparation process of barium acetate. The preparation process comprises the following steps: (1) carrying out reaction on acetic acid and barium carbonate under a reflux condition to obtain a coarse barium acetate solution; (2) filtering the coarse barium acetate solution obtained in the step (1) to remove non-reacted barium carbonate to obtain filtrate I, adding hydrogen peroxide into the filtrate I for reaction for 1 to 2 hours, adjusting the pH of the filtrate I to be neutral with barium hydroxide, and performing fine filtering to obtain filtrate II; and (3) performing evaporative concentration on the filtrate II for crystallization, performing centrifugal separation on crystals, and drying the crystals to obtain the barium acetate product. According to the preparation process, by decomposition, impurity removal, evaporative crystallization, drying and the like, the barium carbonate and the acetic acid are reacted to generate the barium acetate. The production process is simple, and the cost is low; furthermore, the industrial barium carbonate is used as a raw material, and the reflux process is adopted, so that no waste gas and no waste water are discharged in the whole process, but only a few of solids are harmlessly discharged; and therefore, the environmental pollution is eliminated.
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Paragraph 0020
(2017/05/12)
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- Co-production method of high purity crystalline barium acetate and anhydrous barium acetate
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The invention relates to a co-production method of high purity crystalline barium acetate and anhydrous barium acetate. The steps include: (1) preparing analytically pure barium acetate trihydrate; (2) collecting crystalline barium acetate production mother liquor, further performing concentration to a viscous state, and conducting cooling and discharging to obtain anhydrous barium acetate; (3) dissolving analytically pure acetic acid with high purity water, conducting heating to 80-90DEG C, adding industrial barium hydroxide, adding activated carbon, analytically pure oxalic acid and analytically pure ammonium sulfide solution, performing heating and stirring, conducting filtering twice, and carrying out washing and drying to obtain spectroscopically pure and high purity barium acetate; (4) adding acetic acid into a reactor, adding industrial barium hydroxide under stirring, adding oxalic acid and activated carbon, performing heating stirring for minutes, conducting filtering till a clear solution, concentrating the filtrate, when the proportion reaches a standard, performing cooling to 20DEG C, precipitating crystals, conducting spin-drying, and performing drying at room temperature, thus obtaining barium acetate trihydrate; and (5) collecting the liquid of step (4), filtering the liquid again and conducting concentration till a viscous state, the stopping heating, and performing cooling and discharging, thus obtaining anhydrous barium acetate.
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Paragraph 0021
(2017/02/23)
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- Synthesis and characterization of Pt(II) complexes with amine and carboxylato ligands. Crystal structure of (1,1-cyclobutanedicarboxylato)di(ethylamine)platinum(II)·H2O
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Two methods for the synthesis of compounds of the type cis-PtA2X2 (A2 = bidentate amine or two monodentate amines and X2 = bidentate or two monodentate carboxylato ligands) were evaluated. The compounds were characterized by multinuclear NMR and IR spectroscopies. The 195PT NMR chemical shifts were in the range - 1615 to - 1976 ppm, the higher field values corresponding to the complexes containing bidentate ligands. The coupling constants 3J(195Pt-1H) are approximately 35 Hz, while the 2J(195Pt-1HN) are about 70 Hz. One coupling constant 2J(195Pt-13C) (53 Hz) was also measured. The crystal structure of the compound, cis-Pt(1,1-cyclobutanedicarboxylato)(C2H5NH2)2·H2O belongs to the P21/n space group with a=9.468(5), b =9.365(4), c = 16.473(7) A?, β = 105.08(3)°, Z = 4 and R1 = 0.0576. The Pt-N bond distances are 1.992(5) and 2.020(5) A?, while the Pt-O bonds are 2.000(4) and 2.015(4) A?. The molecules are held together by intermolecular H-bonds involving the lattice water molecules and the two free carbonyl O atoms and between the amino H atoms and the Pt-bonded C-O groups. (C) 2000 Elsevier Science S.A.
- Rochon, Fernande D.,Gruia, Letitia M.
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p. 193 - 204
(2008/10/08)
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