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US4721808A Process for purification of crude p-hydroxymethylbenzoic acid 失效
粗对羟基甲基苯甲酸的纯化方法

Process for purification of crude p-hydroxymethylbenzoic acid
摘要:
A crude p-hydroxymethylbenzoic acid compound containing 4-carboxybenzaldehyde is purified and decolorized by hydrogenation in the presence of a platinum on carbon catalyst. 4-carboxybenzaldehyde is hydrogenated to p-hydroxymethylbenzoic acid. Toluic acid is not a product of the hydrogenation process.
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