发明公开
EP0131897A1 High yield process for preparing 3,3',5,5'-tetraalkyl-4,4'-biphenol
无效
Verfahren zur Herstellung von 3,3'，5,5'-四烷基-4,4'-二苯酚咪唑Ausbeute。
- 专利标题： High yield process for preparing 3,3',5,5'-tetraalkyl-4,4'-biphenol
- 专利标题（中）： Verfahren zur Herstellung von 3,3'，5,5'-四烷基-4,4'-二苯酚咪唑Ausbeute。
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申请号： EP84108090.6申请日： 1984-07-10
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公开(公告)号： EP0131897A1公开(公告)日： 1985-01-23
- 发明人: Kruse, Walter Max , Stephen, John Fergus
- 申请人： ICI AMERICAS INC.
- 申请人地址： Concord Pike & New Murphy Road Wilmington Delaware 19897 US
- 专利权人： ICI AMERICAS INC.
- 当前专利权人： ICI AMERICAS INC.
- 当前专利权人地址： Concord Pike & New Murphy Road Wilmington Delaware 19897 US
- 代理机构： Baillie, Iain Cameron
- 优先权： US514253 19830715; US514255 19830715; US514256 19830715
- 主分类号： C07C39/15
- IPC分类号： C07C39/15 ; C07C37/07 ; C07C37/50
摘要：
4,4'- biphenol can be prepared by dealkylation of the hydrogenation product of a diphenoquinone of the formula:
wherein R is a tertiary alkyl group of 4-8 carbon atoms. Additional inventive features includes hydrogenation of an alkylated diphenoquinone in the presence of a heterogeneous catalyst and an alkyl benzene solvent and the dealkylation of a 3,3',5,5' diphenol by heating with an acid catalyst in an at least 4-fold molar excess of an alkyl benzene.
wherein R is a tertiary alkyl group of 4-8 carbon atoms. Additional inventive features includes hydrogenation of an alkylated diphenoquinone in the presence of a heterogeneous catalyst and an alkyl benzene solvent and the dealkylation of a 3,3',5,5' diphenol by heating with an acid catalyst in an at least 4-fold molar excess of an alkyl benzene.
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