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    • 1. 发明授权
    • Shaped organosiloxane polycondensates, process for their preparation and
use
    • 成型有机硅氧烷缩聚物,其制备和使用过程
    • US5466767A
    • 1995-11-14
    • US340877
    • 1994-11-15
    • Stefan WielandPeter PansterHorst Grethe
    • Stefan WielandPeter PansterHorst Grethe
    • C08G77/48C08G77/54C08G77/58C08G77/26C08G77/22C08G77/30
    • C08G77/54C08G77/48C08G77/58
    • Disclosed are shaped organosiloxane polycondensates in the form of macroscopic spherical particles with a diameter of 0.01 to 2.5 mm, a specific surface area of 0.01 to 1000 m.sup.2 /g, a specific pore volume of 0.01 to 5 ml/g, and a bulk density of 50 to 1000 g/l, consisting of units of the formula (I):X--R.sup.1 (I)and/or the formula (II):R.sup.2 --Y--R.sup.3 (II)and the formula (III): ##STR1## as well as optionally, in addition, units of the formula ##STR2## wherein R.sup.1 to R.sup.3 are identical or different and represent a group of the formula (V): ##STR3## R.sup.4 being bonded directly to the X or Y group and representing a linear or branched, fully saturated or unsaturated alkylene group, a cycloalkylene group, a phenylene group or a unit of the formula ##STR4## and M corresponding to a Si, Ti or Zr atom. Also disclosed are a process for preparation and use.
    • 公开了直径为0.01〜2.5mm,比表面积为0.01〜1000m2 / g,比孔体积为0.01〜5ml / g的宏观球状颗粒形状的成型有机硅氧烷缩聚物,体积密度为 由式(I):X-R1(I)和/或式(II):R2-Y-R3(Ⅱ)和式(Ⅲ)组成的单位为50〜1000g / (III)的化合物,另外还有式(IV)的单元,其中R 1至R 3相同或不同并且表示式(Ⅴ)的基团:或Y基团,并且表示直链或支链的 完全饱和或不饱和的亚烷基,亚环烷基,亚苯基或下式的单元,即对应于Si,Ti或Zr原子的式“IMAGE”或“IMAGE”和M。 还公开了一种制备和使用的方法。
    • 5. 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。