Title:
無水マレイン酸を吸収するための有機溶剤の精製法
Document Type and Number:
Japanese Patent JP2004527543
Kind Code:
A
Abstract:
In a process for purifying an organic solvent for the absorption of maleic anhydride from a gaseous mixture, in which the maleic anhydride is separated off from the solvent, a substream is taken from the solvent stream, this substream is distilled and returned to the solvent circuit, the proposed improvement comprises separating off a low-boiling fraction and a high-boiling fraction from the fraction consisting essentially of purified solvent and feeding the fraction consisting essentially of purified solvent back into the solvent stream.
Inventors:
Ralph-Thomas Lane
Alexander Veck
Gerd Kybel
Alexander Veck
Gerd Kybel
Application Number:
JP2002583364A
Publication Date:
September 09, 2004
Filing Date:
April 22, 2002
Export Citation:
Assignee:
BASF Aktiengesellschaft
International Classes:
C07D307/60; C07C51/215; C07C51/44; C07C51/573; C07C57/145; C07C57/15; (IPC1-7): C07D307/60; C07C51/215; C07C51/44; C07C57/145; C07C57/15
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel