首页> 外国专利> Procedure for preparing and purifying 1,1,1-tris (4-hydroxyphenyl) ethane.

Procedure for preparing and purifying 1,1,1-tris (4-hydroxyphenyl) ethane.

机译:制备和纯化1,1,1-三(4-羟苯基)乙烷的程序。

摘要

OBTAIN 1,1,1-TRIS (4-hydroxyphenyl) ethane, mixed with bisphenol A by reacting 2,4-pentanedione with excess phenol in a ratio of at least 6 MOLAR: 1, under acidic conditions in the presence A mercapto compound as a promoter. Such products can be separated by removing the bisphenol A with an chlorinated alkane. Purification of 1,1,1-tris (4-hydroxyphenyl) ethane, is achieved by suspension and / or recrystallization from methanol-water, optionally adding alkali metal borohydride or dithionite.
机译:在酸性条件下,在酸性条件下,在巯基化合物存在的条件下,使1,4-二戊二酮与过量的苯酚以至少6 MOLAR:1的比例反应,从而获得双酚A与1,1,1,1-TRIS(4-羟苯基)乙烷的混合物。启动子。可以通过用氯化烷烃除去双酚A来分离此类产物。通过在甲醇-水中悬浮和/或重结晶,可选地添加碱金属硼氢化物或连二亚硫酸氢盐,可以纯化1,1,1-三(4-羟基苯基)乙烷。

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