公开(公告)号：DE3144794A1

公开(公告)日：1982-07-29

申请号：DE3144794

申请日：1981-11-11

Applicant: AGENCY IND SCIENCE TECHN

Inventor： MATSUDA TAKASHI ,  KAGAMI KANEKICHI ,  MURATA KAZUHISA ,  MATSUDA AKIO ,  WAKABAYASHI KATSUHIKO ,  TAKAMI YASUO

IPC: C07C51/12 ,  C07C27/00 ,  C07C51/09 ,  C07C59/06 ,  C07C67/03 ,  C07C69/675

Abstract: A process for the preparation of glycolic acid or its esters comprises reacting formaldehyde with carbon monoxide at elevated temperature under pressure in the presence of a specific amount of a specific catalyst so as to obtain polyglycolide. Hydrolysis or alcoholysis of the resulting polyglycolide-containing reaction mixture gives glycolic acid or its esters. The catalyst is selected from fluoroantimonic acid, fluorosulphonic acid-antimony pentafluoride, chlorosulphonic acid, fluorosulphonic acid, pyrosulphuric acid, dimethyl sulphate, methyl fluorosulphonate, boron trifluoride and fluoroboric acid.