公开(公告)号：US3925247A

公开(公告)日：1975-12-09

申请号：US42969173

申请日：1973-12-28

Applicant: ONODA CEMENT CO LTD

Inventor： OGURA EIJI ,  NOMURA NOBUKI ,  EMOTO KIYOTADA

IPC: B01D15/00 ,  B01J20/26 ,  B01J21/18 ,  B01J23/06 ,  B01J23/14 ,  B01J27/053 ,  B01J27/08 ,  B01J27/25 ,  B01J31/04 ,  B01J37/02 ,  B01J37/26 ,  B01J45/00 ,  C02F1/28 ,  C02F1/62 ,  C07C17/08 ,  B01J27/02 ,  B01J27/12 ,  B01J27/24

CPC classification number: B01J37/26 ,  B01J21/18 ,  B01J23/06 ,  B01J23/14 ,  B01J27/053 ,  B01J27/08 ,  B01J27/25 ,  B01J31/04 ,  B01J37/0207 ,  B01J2231/32 ,  C07C17/08 ,  C07C21/18

Abstract: This invention relates to an improved method of producing a catalyst for the production of vinyl fluoride. This invention comprises incorporating activated carbon, which has been activated with nitric acid and subsequently washed so as to remove the acid with a mercuric compound or a cadmium compound, or a mixture of a mercuric compound and a compound consisting of chloride, fluoride, sulphate, nitrate, oxide or hydroxide of lead, tin, cadmium or zinc, and pre-treating the resultant material at a temperature of 30* to 300*C with hydrogen fluoride gas.