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    • 5. 发明授权
    • Process for preparing colloidal ceric oxide and complexes thereof with
free organic acids
    • 制备胶体氧化铈及其与游离有机酸的配合物的方法
    • US4647401A
    • 1987-03-03
    • US678424
    • 1984-12-05
    • Peter S. GradeffFred G. SchreiberVincent J. CharteJohn F. Davison
    • Peter S. GradeffFred G. SchreiberVincent J. CharteJohn F. Davison
    • B01J13/00C01F17/00C07C51/41C07F5/00C09D191/00C09D3/26C09K11/07
    • C07C309/00C01F17/0012C01F17/0043C07C51/414C07F5/00C01P2002/01
    • A process is provided for preparing colloidal dispersions of ceric dioxide in inert organic media which comprises(1) heating(a) ceric dioxide comprising ammonium nitrate or ammonium and nitrate ions in an amount within the range from about 3 to about 14% by weight of the ceric dioxide and a member selected from the group consisting of water, methanol, acetic acid and mixtures thereof in an amount usually from about 10 to about 60 g per mole of CeO.sub.2, sufficient to effect reaction with(b) an organic acid having from about ten to about forty carbon atoms(c) an organic solvent selected from the group consisting of(i) aliphatic and aromatic hydrocarbons, such as petroleum spirits, benzene, toluene, chlorobenzene, chlorotoluene, etc.(ii) aliphatic and cycloaliphatic ethers, such as isopropyl ether or dicyclohexyl ether(iii) aliphatic and cycloaliphatic ketones, such as diisobutylketone or cyclohexanone at a temperature within the range from about 60.degree. to about 200.degree. C. thereby effecting dispersion of the ceric dioxide;(2) removing water, methanol, acetic acid or mixtures thereof, and separating undissolved particles of solid material such as ammonium nitrate and undissolved cerium dioxide.Association complexes are also provided, composed of ceric dioxide and organic acid having from about ten to about forty carbon atoms in a molar ratio CeO.sub.2 /organic acid of at least 4:1.
    • 提供了一种用于制备惰性有机介质中二氧化铈的胶体分散体的方法,其包括(1)加热(a)包含硝酸铵或铵和硝酸根离子的二氧化铈,其量为约3至约14重量% 二氧化铈和选自水,甲醇,乙酸及其混合物的成员,其量通常为每摩尔CeO 2约10至约60g,足以与(b)有机酸反应 约10至约40个碳原子(c)选自(i)脂族和芳族烃如石油醚,苯,甲苯,氯苯,氯甲苯等的有机溶剂。(ii)脂族和脂环族醚, 例如异丙醚或二环己基醚(iii)脂族和脂环族酮,例如二异丁基酮或环己酮,温度范围为约60-约200℃。 分散二氧化铈; (2)除去水,甲醇,乙酸或其混合物,并分离固体物质如硝酸铵和未溶解的二氧化铈的未溶解颗粒。 还提供了由二氧化铈和具有至少4:1的CeO 2 /有机酸的摩尔比约10至约40个碳原子的有机酸组成的缔合络合物。