Process for the preparation of acyloxybenzenesulfonic acids and their
salts
    11.
    发明授权
    Process for the preparation of acyloxybenzenesulfonic acids and their salts 失效
    制备乙酰苯二酚酸及其盐的方法

    公开(公告)号:US5100588A

    公开(公告)日:1992-03-31

    申请号:US154057

    申请日:1988-02-09

    CPC分类号: C07C309/00

    摘要: The process for the preparation of acyloxybenzenesulfonic acids of the general formula ##STR1## in which R denotes a (C.sub.1 -C.sub.17)-alkyl or (C.sub.2 -C.sub.17)-alkenyl radical, or alkali metal, alkaline earth metal or ammonium salts thereof, is carried out in the following stages: (a) sulfonation of phenol, (b) heat treatment of the phenolsulfonic acid formed as the intermediate product, (c) esterification of the phenolsulfonic acid and, if appropriate, (d) neutralization of the resulting (C.sub.2 -C.sub.18)-acyloxybenzenesulfonic acid. As a result of the incorporation of stage (b), the process affords products in which the proportion of the 1,4-isomer compared with the 1,2-isomer is markedly increased, as a result of which these products can be used, in particular, as perborate activators in detergents.

    摘要翻译: 其中R表示(C1-C17) - 烷基或(C2-C17) - 烯基或其碱金属,碱土金属或铵盐的通式为“IMAGE”的酰氧基苯磺酸的制备方法为 在以下阶段进行:(a)苯酚的磺化,(b)作为中间产物形成的酚磺酸的热处理,(c)苯酚磺酸的酯化,如果合适的话,(d)中和所得的( C2-C18) - 酰氧基苯磺酸。 作为阶段(b)的结合,该方法提供了与1,2-异构体相比的1,4-异构体的比例显着增加的产物,由此可以使用这些产物, 特别是作为洗涤剂中的过硼酸盐活化剂。