公开(公告)号：DE2716032A1

公开(公告)日：1978-10-26

申请号：DE2716032

申请日：1977-04-09

Applicant: BASF AG

Inventor： OSTERTAG WERNDER DR ,  WUNSCH GERD DR ,  KIENER VOLKER DR ,  HETZEL ECKHARD DIPL ING ,  SCHREINER SIEGFRIED DR ,  LEUTNER BERND DR ,  SCHLIMPER HANS-ULRICH DR ,  VOELKL ERFRIED DR

IPC: C01B17/66 ,  C07C51/00 ,  C07C53/06 ,  C07C67/00

Abstract: In a process for the manufacture of sodium dithionite by reacting sulfur dioxide with sodium formate and aqueous sodium hydroxide solution in the presence of methanol, an aqueous methanolic solution of sodium formate is first produced by reacting carbon monoxide with sodium hydroxide solution in an aqueous medium, containing from 1 to 50% by weight of methanol, based on the amount of water, at from 80 to 120 DEG C. under a pressure of from 10 to 40 bars. The resulting aqueous methanolic solution can be reacted directly, in the conventional manner, with sulfur dioxide and aqueous sodium hydroxide solution to give sodium dithionite.