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Application

4607543/04, 1988-11-22

(22)

Actual filing date

1988-11-22

(45)

Published

1994-12-30

(72)

Inventor

Zhesko T.E.Nikitina A.G.Novikova E.G.Bojarskij V.P.Beletskaja I.P.Vorozhtsov G.N.Shigalevskij V.A.Solomatin G.G.

METHOD FOR PRODUCTION OF 5,6-ACENAPHTHENE DICARBOXYLIC ACID Russian patent published in 1994 - IPC

Abstract SU 1630247 A1

FIELD: production of carboxylic acids. SUBSTANCE: method for production of 5,6- acenaphthene dicarboxylic acid includes carboxylating the 5,6-dichloro- acenaphthene at 55-65 C and pressure of carbon oxide of 1 atm in methanol in the presence of cobalt carbonyl (catalyst) in the amount of 0.5-5.0 mas. % as per 5,6-dichloroacenaphthene, benzyl chloride (cocatalyst) and base. Process is conducting by gradual dosing of benzyl chloride at the rate of 1-6 mole/mole of cobalt carbonyl per hour at initial introduction of cocatalyst in the amount of 2-4 mole/mole of cobalt carbonyl, further acidification of hydrolysis and filtration of desired product. Additionally separated from filtrate after separation of desired product is phenylacetic acid. Method provides for increase of conversion of 5,6-dichloroacenaphthene by 1-12% and desired product yield by 1.1-10.7%. EFFECT: increased conversion of 5,6-dichloroacenaphthene and yield of desired product, and higher efficiency of process. 1 tbl

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SU 1 630 247 A1

Authors

Zhesko T.E.

Nikitina A.G.

Novikova E.G.

Bojarskij V.P.

Beletskaja I.P.

Vorozhtsov G.N.

Shigalevskij V.A.

Solomatin G.G.

Dates

1994-12-30—Published

1988-11-22—Filed

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