Preparation process of biphenyl-4,4'-dicarboxylic acid

Details Preparation process of biphenyl-4,4'-dicarboxylic acid Preparation process of biphenyl-4,4'-dicarboxylic acid

1988-11-30

1990-11-13

Shippen, Michael L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 51255

Patent

active

049703382

ABSTRACT:
Biphenyl-4,4'-dicarboxylic acid is prepared by isolating a mixture of diisopropylbiphenyls from a reaction mixture obtained by reacting biphenyl with propylene, crystallizing 4,4'-diisopropylbiphenyl from the mixture of diisopropylbiphenyls, and oxidizing 4,4'-diisopropylbiphenyl or an oxidation intermediate thereof with molecular oxygen in the presence of an oxidation catalyst, which comprises a cobalt catalyst and/or manganese catalyst, in a solvent containing at least 50 wt. % of an aliphatic mono- carboxylic acid having up to 3 carbon atoms.

REFERENCES:
patent: 3281459 (1956-10-01), Serres
patent: 4804788 (1989-02-01), Konai
Prostakov, Zr. Prinkl. Khim, 40 pp. 935-936 (1967).
Roberts, "An Introduction to Modern Experimental Organic Chemistry," pp. 35-41 (1969).
Blanchi, C. Paul, Chemical Abstracts, vol. 96, No. 25, p. 705, 96:217480y, "4,4'-Biphenyldicarboxylic acid", Jun. 21, 1982.
Billmeyer, Fred W., Chemical Abstracts, vol. 81, No. 24, p. 420, 159548d, "Preparation of 4,4'-diphenyldicarboxylic acid", Dec. 16, 1974.
Beck, Curt W., Chemical Abstracts, vol. 67, No. 7, p. 3045, 32367z, "Oxidation of p,p'-bitolyl", Aug. 14, 1967.
Ukr, Khim, ZH., 30, 938-941 (1964).

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