Process for producing diol compounds

Details Process for producing diol compounds Process for producing diol compounds

1994-12-27

1996-07-16

Evans, Joseph E.

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

Organic compounds

Oxygen containing

502343, 564468, 564503, 568885, C07C 29149, C07C 3120

Patent

active

055368883

ABSTRACT:
A diol compound, for example, hexanediol, is produced with a high efficiency by esterifying a carboxylic acid mixture, collected from a reaction product mixture of a liquid phase oxidation of cyclohexane, with an esterifying agent and hydrogenate-decomposing the resultant esterification product mixture with hydrogen. The hydrogenate-decomposition is carried out by using a specific catalyst free from chromium and including a member selected from (A) copper and zinc-containing catalytic materials which are prepared by mixing an aqueous solution of water-soluble copper and zinc salts with an aqueous alkali metal or ammonium carbonate or alkali metal or ammonium hydrogen carbonate solution, reducing the resultant precipitate comprising a basic copper and zinc carbonate mixture with hydrogen and partially oxidizing the resultant reduction product with an oxygen-containing gas, and (B) copper and zinc-containing catalytic materials which are prepared by conducting the same mixing procedure as that for the catalytic material (A) except that the mixing is carried out at a temperature of 60.degree. to 95.degree. C. at a pH of 6.5 to 9.0, and by calcining the resultant precipitate at a temperature of 300.degree. C. to 450.degree. C.

REFERENCES:
patent: 2079414 (1937-05-01), Lazier
patent: 2617835 (1952-11-01), Curtin
patent: 3524892 (1970-08-01), Horlenko et al.
patent: 4918248 (1990-04-01), Hattori et al.
patent: 5142067 (1992-08-01), Wegman et al.
patent: 5364986 (1994-11-01), Demmering et al.
patent: 5386066 (1995-01-01), Schneider et al.
Patent Abstracts of Japan, vol. 006 No. 219 (C-132), 2 Nov. 1982 & JP-A-57 122941 (Ube Kosan) 31 Jul. 1982.

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