Title:
反応混合物を分離し、4級塩および塩基をリサイクルする方法
Document Type and Number:
Japanese Patent JP2005512806
Kind Code:
A
Abstract:
A process for the removal and recovery of quaternary salt (A) and base (D) from a reaction mixture is disclosed. The reaction mixture resulting from oxidative direct carbonylation contains in addition to (A) and (D), at least one hydroxyaromatic compound (B) and at least one reaction product (C) and optionally a solvent, and the process entails a) adding acid to the reaction mixture to cause conversion of (D) into a hydroxyaromatic compound (B2) b) separating the reaction mixture into b1.) that contains (C) and optionally (B) and/or (B2) and b2.) that contains (A) and optionally (B) and/or (B2), and c) reacting b1.) with a base (E) to re-form (D).
Inventors:
Peter Fisher
Sven Michael Hansen
Claus-Peter Reisinger
Sven Michael Hansen
Claus-Peter Reisinger
Application Number:
JP2003556173A
Publication Date:
May 12, 2005
Filing Date:
December 20, 2002
Export Citation:
Assignee:
Bayer MaterialScience AG
International Classes:
B01J31/32; B01J31/40; B01J38/00; C07C37/72; C07C37/74; C07C68/08; C07C69/96; C07C277/06; C07C279/04; B01J38/48; (IPC1-7): B01J31/32; B01J31/40; B01J38/00; C07C68/08; C07C69/96; C07C277/06; C07C279/04
Attorney, Agent or Firm:
Aoyama Aoi
Muneo Yamamoto
Yuko Goto
Muneo Yamamoto
Yuko Goto