发明名称 |
Method for producing high purity 1,1-bis(4-hydroxyphenyl)cyclohexanes |
摘要 |
A method for producing a high purity 1,1-bis(4-hydroxyphenyl)cyclohexane represented by the general formula (II),wherein R is a hydrogen atom or alkyl group, comprising the steps of: reacting cyclohexanone and a phenol represented by the general formula (I) in the presence of an acid catalyst;wherein R is the same as defined above,neutralizing the resultant reaction mixture with an alkali; primarily crystallizing and filtering a 1,1-bis(4-hydroxyphenyl)cyclohexane produced to obtain a primary crystallization filtrate; dissolving 100 parts by weight of the primary crystallization filtrate in a mixed solvent, which comprises 5 to 10 parts by weight of water and 100 to 200 parts by weight of a lower aliphatic ketone solvent, or 200 to 400 parts by weight of a lower aliphatic alcohol solvent; filtering the resulting solution through a zeta potential filter; and secondarily crystallizing and filtering the 1,1-bis(4-hydroxyphenyl)cyclohexane from the resulting filtrate in the presence of water.
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申请公布号 |
US6875896(B2) |
申请公布日期 |
2005.04.05 |
申请号 |
US20040879436 |
申请日期 |
2004.06.29 |
申请人 |
HONSHU CHEMICAL INDUSTRY CO., LTD. |
发明人 |
YAO KAZUHIKO;NAKAGUCHI TOORU;EKAWA KENJI |
分类号 |
C07C37/70;G02F1/13;B08B3/02;C07C37/20;C07C37/68;C07C37/82;C07C37/84;C07C39/12;C07C39/16;C07C39/17;G02F1/1333;H01L21/304;H01L21/68;H01L21/683;(IPC1-7):C07C39/17 |
主分类号 |
C07C37/70 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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