发明授权
US4855484A Process for the preparation of 4-hydroxyphenyl 4-hydroxybenzoate and the
use thereof
失效
4-羟基苯甲酸4-羟基苯酯的制备方法及其用途
- 专利标题： Process for the preparation of 4-hydroxyphenyl 4-hydroxybenzoate and the use thereof
- 专利标题（中）： 4-羟基苯甲酸4-羟基苯酯的制备方法及其用途
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申请号： US64679申请日： 1987-06-22
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公开(公告)号： US4855484A公开(公告)日： 1989-08-08
- 发明人: Hanns P. Muller , Roland Gipp
- 申请人： Hanns P. Muller , Roland Gipp
- 申请人地址： DEX Leverkusen
- 专利权人： Bayer Aktiengesellschaft
- 当前专利权人： Bayer Aktiengesellschaft
- 当前专利权人地址： DEX Leverkusen
- 优先权： DEX3622611 19860705
- 主分类号： B01J27/02
- IPC分类号： B01J27/02 ; B01J21/02 ; B01J27/00 ; B01J31/00 ; B01J31/02 ; C07B61/00 ; C07C67/08 ; C07C69/84 ; C07C69/88 ; C08G64/00
摘要：
A process for the preparation of 4-hydroxyphenyl 4-hydroxy-benzoate by esterification of hydroquinone and p-hydroxybenzoic acid is described, wherein an esterification catalyst is used and wherein the reaction is carried out in a reaction medium in which the reactants are substantially dispersed. The use of the compound, accessible by the above process in high yield and good industrial purity, for the preparation of linear polycarbonates or copolycarbonates is furthermore claimed.
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