METHOD FOR ISOLATION OF 2,5-BIPHENYL DICARBOXYLIC ACID Russian patent published in 1998 - IPC

Abstract RU 2103256 C1

FIELD: organic chemistry. SUBSTANCE: method is carried out by isolation of 2,5-diphenyl dicarboxylic acid against products of oxidation of 2,5-dimethyl biphenyl. Method involves treatment of products of oxidation of 2,5-dimethyl biphenyl with aqueous solution of alkaline metal salt. Then thus prepared mixture is filtered, filtrate being acidified to pH 4.35-4.40. Thus obtained mixture is filtered, filtrate is acidified to pH less than 3. By filtration thus prepared mixture desired product is isolated as precipitate. EFFECT: improved quality of desired product.

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RU 2 103 256 C1

Authors

Koshel' Sergej Georgievich[Ru]

Krjukova Galina Georgievna[Ru]

Koshel' Georgij Nikolaevich[Ru]

Lebedeva Nina Valentinovna[Ru]

Rudkovskij Ehduard Kazimirovich[Ua]

Obukhova Tat'Jana Aleksandrovna[Ru]

Razzhivina Svetlana Jur'Evna[Ru]

Postnova Marina Viktorovna[Ru]

Dates

1998-01-27Published

1996-06-06Filed