发明授权
- 专利标题: Process for purification of crude p-hydroxymethylbenzoic acid
- 专利标题(中): 粗对羟基甲基苯甲酸的纯化方法
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申请号: US40887申请日: 1987-04-21
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公开(公告)号: US4721808A公开(公告)日: 1988-01-26
- 发明人: Lawrence D. Lillwitz , Steven A. Cerefice
- 申请人: Lawrence D. Lillwitz , Steven A. Cerefice
- 申请人地址: IL Chicago
- 专利权人: Amoco Corporation
- 当前专利权人: Amoco Corporation
- 当前专利权人地址: IL Chicago
- 主分类号: C07C51/487
- IPC分类号: C07C51/487 ; C07C65/00
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.
公开/授权文献
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