公开(公告)号：DE2208923A1

公开(公告)日：1973-09-06

申请号：DE2208923

申请日：1972-02-25

Applicant: BASF AG

Inventor： HETZEL ECKHARD DIPL ING ,  KORPIUN OLAF DR

IPC: C07C20060101 ,  C07C121/12

Abstract: 1411180 Perfluorocarboxylic acid nitrites BADISCHE ANILIN- & SODA-FABRIK AG 23 Feb 1973 [25 Feb 1972] 8940/73 Heading C2C Perfluorocarboxylic acid nitriles are prepared by reacting the corresponding perfluorocarbonamide with phosphorus pentoxide in the gas phase at 450-600‹ C. in the presence of an inert carrier gas. The perfluorocarboxamide preferably has 2-16 C atoms, e.g. perfluoroacetamide, -propionamide, -octanamide and -cyclohexylcarbonamide. Preferably 1 to 10 moles of P 2 0 5 are reacted per mole of amide at 460-560‹ 0. for a residence time of 2-20 seconds with nitrogen as the carrier gas. The reaction mixture is advantageously quenched with water to 15-25‹ C.