发明名称 |
Production of bisphenol monoester |
摘要 |
<p>A bisphenol monoester represented by the formula (I): <CHEM> wherein R<1> is hydrogen or alkyl, R<2> and R<3> are each alkyl, and R<4> is alkyl, alkenyl or phenyl, is produced by continuous two step reactions in which an aldehyde R<1>-CHO and 2,4-dialkylphenol are subjected to a condensation reaction in a C6-C10 aliphatic or C6-C12 aromatic hydrocarbon solvent, and then a resulting bisphenol compound dissolved in the solvent is subjected to an esterification with a carboxylic acid R<4>-COOH or its derivative. Prior to the esterification, the organic layer containing the bisphenol compound is subjected to a dehydration treatment, thereby enabling the two steps to proceed continuously without isolating the intermediate bisphenol compound. A purification process for the bisphenol monoester of the formula (I) is also disclosed in which the monoester is purified from a mixed solvent comprising a C6-C12 aromatic hydrocarbon solvent and a C1-C8 alcohol or C2-C3 aliphatic nitrile solvent.</p> |
申请公布号 |
EP0500323(B1) |
申请公布日期 |
1997.01.15 |
申请号 |
EP19920301324 |
申请日期 |
1992.02.18 |
申请人 |
SUMITOMO CHEMICAL COMPANY LIMITED |
发明人 |
INOUE, KIKUMITSU;SASAKI, MANJI;YAMAMOTO, KAZUAKI;YACHIGO, SHINICHI |
分类号 |
C07C37/20;C07C67/52;C07C69/017;C07C69/54;C07C69/773;(IPC1-7):C07C67/08;C07C39/16 |
主分类号 |
C07C37/20 |
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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