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2 032 682

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C1

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IPC

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Application

5035805/04, 1992-04-03

(22)

Actual filing date

1992-04-03

(45)

Published

1995-04-10

(72)

Inventor

Liakumovich A.G.Samuilov Ja.D.Budkin V.A.Starovojtov V.I.Gol'Dberg Ju.M.

(73)

Holder

Aktsionernoe Obshchestvo Zakrytogo Tipa Promyshlenno-Finansovaja Gruppa Vnedrenija"

METHOD FOR PRODUCING ANHYDRIDE OF ENDO-NORBORNENE-2,3-DICARBOXYLIC ACID Russian patent published in 1995 - IPC

Abstract RU 2032682 C1

FIELD: organic chemistry. SUBSTANCE: desired product has melting point 164-165 C. Cyclopentadiene fraction produced by thermal decomposition of dicyclopentadiene having cyclopentene content 80-96 % and boiling point 38-60 C is used as reagent 1, desired product being added into origin suspension. Maleic anhydride is used as reagent 2, its mass ratio to anhydride of endo-norbornene-2,3-dicarboxylic acid is 1:0.1-0.1. Reaction is carried out in atmosphere of carbon dioxide. EFFECT: improves efficiency of the method. 12 cl, 1 tbl

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RU 2 032 682 C1

Authors

Liakumovich A.G.

Samuilov Ja.D.

Budkin V.A.

Starovojtov V.I.

Gol'Dberg Ju.M.

Dates

1995-04-10—Published

1992-04-03—Filed

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