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US4612399A Purification of 4-fluoro-4'-hydroxybenzophenone 失效
4-氟-4'-羟基二苯甲酮的纯化

Purification of 4-fluoro-4'-hydroxybenzophenone
摘要:
A mixture of isomers of fluoro-4'-hydroxybenzophenone are dissolved in an aqueous solution of a base, for example sodium hydroxide, and sufficient acid is added to reduce the pH to not less than 9 and to precipitate 4-fluoro-4'-hydroxybenzophenone having a reduced proportion of other isomers.
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