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2 323 204

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(51)

IPC

C07C51/58(2006-01-01)

C07C61/15(2006-01-01)

C07C61/40(2006-01-01)

(21) (22)

Application

2006123324/04, 2006-06-29

(24)

Start date

2006-06-29

(22)

Actual filing date

2006-06-29

(45)

Published

2008-04-27

(72)

Inventor

Igumnov Sergej MikhajlovichLekontseva Galina IvanovnaNatsibullina Galina Jur'EvnaSoshin Vladimir AleksandrovichZadorin Aleksej Evgen'Evich

(73)

Holder

Federal'Noe Gosudarstvennoe Unitarnoe Predprijatie Nauchnyj Tsentr Khimija"

METHOD FOR PREPARING PERFLUOROCYCLOHEXENE 1-CARBOXYLIC ACID FLUOROANHYDRIDE OR PERFLUOROCYCLOHEXANE CARBOXYLIC ACID FLUOROANHYDRIDE Russian patent published in 2008 - IPC C07C51/58 C07C61/15 C07C61/40

Abstract RU 2323204 C1

FIELD: chemical technology.

SUBSTANCE: invention relates to a method for synthesis of perfluorocyclohexene 1-carboxylic acid fluoroanhydride or perfluorocyclohexane carboxylic acid fluoroanhydride. Method involves decarbonylation of perfluorohexane dicarboxylic acid 1,2-difluoroanhydride at temperature 150-450°C in the presence of catalyst, namely, aluminum trifluoride applied on aluminum oxide, or activated carbon promoted with potassium fluoride wherein the content of metal fluorides in catalyst is 10-40 weight% to form perfluorocyclohexene 1-carboxylic acid fluoroanhydride that is isolated as the end product, or subjected to further fluorination with gaseous fluorine in inert solvent medium at temperature from -20°C to 50°C and isolation of perfluorocyclohexane carboxylic acid fluoroanhydride by rectification.

EFFECT: improved method of synthesis.

2 cl, 8 ex

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RU 2 323 204 C1

Authors

Igumnov Sergej Mikhajlovich

Lekontseva Galina Ivanovna

Natsibullina Galina Jur'Evna

Soshin Vladimir Aleksandrovich

Zadorin Aleksej Evgen'Evich

Dates

2008-04-27—Published

2006-06-29—Filed