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    • 10. 发明授权
    • Process for producing carboxylic acid esters and catalysts therefor
    • 制备羧酸酯及其催化剂的方法
    • US5922900A
    • 1999-07-13
    • US922558
    • 1997-09-03
    • Stefan WielandPeter Panster
    • Stefan WielandPeter Panster
    • B01J31/06C07B61/00C07C67/08C07C69/14C07C69/80C07C67/00C08G77/00C08G79/00
    • C07C67/08
    • A process for producing carboxylic acid esters by the following steps:a) preparation of a reaction mixture containing an alcohol and a carboxylic acid and/or a carboxylic anhydride and/or a carboxylic acid ester and or a partially esterified carboxylic acid,b) heating of this mixture to the suitable reaction temperature in the presence of a solid polysiloxane insoluble in the reaction medium and having sulphonic acid groups with intensive thorough mixing accompanied by continuous separation of the reaction water which forms, wherein the polysiloxane used as the catalyst in modified by treatment with a soluble aluminum, titanium or zirconium compound, and the spherical particles thereof have a diameter of 0.01 to 3 mm, a specific surface of 0.1 to 1200 m.sup.2 /g, a specific pore volume of 0.01 to 6.0 ml/g and a bulk density of 50 to 1000 g/l.
    • 一种通过以下步骤制备羧酸酯的方法:a)制备含有醇和羧酸和/或羧酸酐和/或羧酸酯和/或部分酯化的羧酸的反应混合物,b)加热 该混合物在不溶于反应介质的固体聚硅氧烷存在下具有适当的反应温度,并且具有强烈浓缩的磺酸基团,伴随着形成的反应水的连续分离,其中用作催化剂的聚硅氧烷被改性为 用可溶性铝,钛或锆化合物处理,其球形颗粒的直径为0.01〜3mm,比表面积为0.1〜1200m2 / g,比孔体积为0.01〜6.0ml / g,体积 密度为50〜1000g / l。