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    • 4. 发明授权
    • Preparation of alkyl glycosides
    • 烷基糖苷的制备
    • US5554742A
    • 1996-09-10
    • US295795
    • 1994-09-15
    • Gerhard WolfAlfred OftringGeorg SchuhHelmut WolfRudolf AltHans-Heinrich BechtolsheimerDieter Hertel
    • Gerhard WolfAlfred OftringGeorg SchuhHelmut WolfRudolf AltHans-Heinrich BechtolsheimerDieter Hertel
    • C07H15/04C07H1/00
    • C07H15/04
    • The preparation of alkyl glycosides by reaction of aqueous glycoses having a water content of 10-80% by weight with aliphatic primary alcohols having from 5 to 30 C atoms is described, in which(a) the alcohols and the glycoses are employed in a molar ratio of 2:1 to 10:1,(b) 0.1-5% by weight, based on the amount of the glycoses employed, of the acidic form of an anionic surfactant is used as the acidic catalyst having emulsifying properties,(c) 1-30% by weight, based on the amount of the glycoses employed, of alkyl glycosides is used as a further emulsifier,(d) the aqueous glycose is preheated to 50.degree.-90.degree. C. and the preheated aqueous solution of the glycose is metered with effective mixing into the reaction mixture of alcohol, acidic catalyst and emulsifier in such a manner that an emulsion is formed,(e) the reaction is carried out at from 100.degree. to 150.degree. C. and from 10 to 100 mbar, the water introduced into the reaction mixture and the water formed by the reaction being continuously removed by distillation,(f) after the reaction has ended, the acidic catalyst is neutralized by addition of a base such that the resulting mixture has a pH of 8-10, then(g) the excess alcohol is removed by distillation at from 0.01 to 10 mbar down to a residual content of less than 5% by weight, based on the amount of alkyl glycoside present, and(h) the reaction mixture is bleached at pH 8-10 after conversion into an aqueous paste having a content of from 30 to 70% by weight of alkyl glycoside using a compound eliminating active oxygen.
    • PCT No.PCT / EP93 / 00791 Sec。 371日期1994年9月15日 102(e)1994年9月15日PCT 1993年4月1日PCT PCT。 出版物WO93 / 21196 日期:1993年10月28日描述了通过水含量为10-80%(重量)的水性糖苷与具有5至30个碳原子的脂族伯醇反应制备烷基糖苷,其中(a)醇和糖 以摩尔比为2:1至10:1使用,(b)0.1-95重量%,基于所用糖苷的量,酸性形式的阴离子表面活性剂用作具有乳化性的酸性催化剂 性质,(c)基于所用糖糖的量,将1-30重量%的烷基糖苷用作另外的乳化剂,(d)将糖水溶液预热至50-90℃,将预热的 以醇,酸性催化剂和乳化剂的反应混合物中有效混合糖的水溶液,使得形成乳液,(e)反应在100-150℃和从 10至100毫巴,引入反应混合物中的水和由t形成的水 通过蒸馏连续除去反应,(f)反应结束后,通过加入碱中和酸性催化剂,使得所得混合物的pH值为8-10,然后(g)过量的醇通过 以0.01至10毫巴蒸馏至基于存在的烷基糖苷的量小于5重量%的残留含量,和(h)将反应混合物在转化成具有 使用除去活性氧的化合物,含有30〜70重量%的烷基糖苷。