Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1992-08-14
1994-08-02
Dees, Jose G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
560 77, 562417, 562480, 562488, 568630, 568631, 568928, 570129, 570182, 585400, C07C 51215, C07C 6739
Patent
active
053347544
ABSTRACT:
Provided is a process for preparing 2,5-diphenylterephthalic acid, which is useful in preparing certain polyesters, especially liquid-crystalline polyesters. In this process, p-xylene is di-alkylated with cyclohexene to provide 2,5-dicyclo-hexyl-p-xylene, which is in turn dehydrogenated to provide 2,5-diphenylxylene. 2,5-Diphenylxylene is then oxidized to provide 2,5-diphenylterephthalic acid by utilization of a cobaltous/manganous/bromide oxidation system.
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Arnold, III Ernest W.
Fugate Eric J.
Fuller, Jr. Dewey W.
Gustafson Bruce L.
Sumner, Jr. Charles E.
Clarke Vera C.
Dees Jos,e G.
Eastman Chemical Company
Graves, Jr. Bernard J.
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