| 摘要 |
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 |
