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Procedure for preparing and purifying 1,1,1-tris (4-hydroxyphenyl) ethane.
Procedure for preparing and purifying 1,1,1-tris (4-hydroxyphenyl) ethane.
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机译:制备和纯化1,1,1-三(4-羟苯基)乙烷的程序。
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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.
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