Preparation of poloxy-alkylene glycols
    3.
    发明授权
    Preparation of poloxy-alkylene glycols 失效
    烷氧基 - 亚烷基二醇的制备

    公开(公告)号:US5416240A

    公开(公告)日:1995-05-16

    申请号:US24903

    申请日:1993-03-02

    CPC classification number: C08G65/20

    Abstract: Polyoxyalkylene glycols are prepared by a process in which tetrahydrofuran is polymerized with a total of not more than 95 mol %, based on the amount of tetrahydrofuran used, of one or more comonomers from the group consisting of the cyclic ethers and acetals in the absence of water and in the presence of a monohydric alcohol or of a monocarboxylic acid with the aid of an anhydrous heteropoly acid catalyst, and the polyoxyalkylene glycol is liberated from the resulting polyoxyalkylene glycol monoethers or polyoxyalkylene glycol monoesters by cleavage of the monoether or monoester bond.

    Abstract translation: 聚氧亚烷基二醇通过以下方法制备,其中四氢呋喃基于所用四氢呋喃的总量不超过95摩尔%,在不存在共聚单体的情况下聚合来自由环醚和缩醛组成的组中的一种或多种共聚单体 水和一元醇或单羧酸存在下,借助于无水杂多酸催化剂,通过裂解单醚或单酯键,从所得聚氧亚烷基二醇单醚或聚氧亚烷基二醇单酯中释放出聚氧亚烷基二醇。

    Preparation of pourable choline chloride/silica powders
    4.
    发明授权
    Preparation of pourable choline chloride/silica powders 失效
    可浇注氯化胆碱/二氧化硅粉末的制备

    公开(公告)号:US4775540A

    公开(公告)日:1988-10-04

    申请号:US33849

    申请日:1987-04-03

    CPC classification number: A61K9/143 A23K20/174 A23K40/10 A61K9/145 Y10S426/807

    Abstract: A process for the preparation of pourable choline chloride/silica powders by mixing silica with choline chloride and, where appropriate, drying this mixture, wherein spray-dried or fluidized bed-dried silica which has a particle size of from 30 to 250 .mu.m is mixed with an aqueous choline chloride solution which contains from 70 to 80% by weight, based on the solution, of choline chloride and is at from 40.degree. to 80.degree. C., thereafter from 0.05 to 0.4% by weight, based on the mixture, of magnesium stearate or calcium stearate is added and, if appropriate, the resulting mixture is dried.

    Abstract translation: 通过将二氧化硅与氯化胆碱混合并适当地干燥该混合物来制备可倾倒的氯化胆碱/二氧化硅粉末的方法,其中具有30至250μm的粒度的喷雾干燥或流化床干燥的二氧化硅是 与氯化胆碱氯化物溶液混合,该溶液含有70至80重量%的氯化胆碱溶液,为40-80℃,其后为0.05至0.4重量%,基于混合物 ,硬脂酸镁或硬脂酸钙,如果合适,将所得混合物干燥。

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