申请人:Amoco Corporation
公开号:US05082959A1
公开(公告)日:1992-01-21
An improved process is disclosed for preparation of silicon-containing aromatic polyacids by liquid phase oxidation of a silyl compound in the presence of oxygen and a catalyst comprising cobalt-manganese-bromine. 2-Trimethylsilyl-p-xylene is oxidized to 2-trimethylsilyl-terephthalic acid; 5-trimethylsilyl-m-xylene is oxidized to 5-trimethylsilyl-isophthalic acid, 2,5-bis (trimethylsilyl)-p-xylene is oxidized to 2,5-bis (trimethylsilyl)-terephthalic acid; 5-trimethylsilyl-pseudocumene is oxidized to 1,2,4-tricarboxy-5-trimethylsilyl benzene; and 1,3-bis-(p-tolyl)-tetramethyl-disiloxane is oxidized to 1,3-bis(p-carboxyphenyl)-tetramethyl-disiloxane.
本发明揭示了一种改进的工艺,用于在氧和催化剂(包括钴-锰-溴)的存在下通过液相氧化硅基化合物制备含硅芳香族聚酸。2-三甲基硅基-p-二甲苯被氧化为2-三甲基硅基-对苯二甲酸; 5-三甲基硅基-m-二甲苯被氧化为5-三甲基硅基-异苯二甲酸,2,5-双(三甲基硅基)-p-二甲苯被氧化为2,5-双(三甲基硅基)-对苯二甲酸; 5-三甲基硅基-伪叔丁基被氧化为1,2,4-三羧基-5-三甲基硅基苯; 1,3-双(对甲苯基)-四甲基-二硅氧烷被氧化为1,3-双(对羧基苯基)-四甲基-二硅氧烷。