Title:
【発明の名称】純ベンゼンおよび純トルエンを同時に取得する方法
Document Type and Number:
Japanese Patent JP2989017
Kind Code:
B2
Abstract:
The invention relates to a process for simultaneously obtaining pure benzene and pure toluene by extractive distillation with N-formylmorpholine and/or other N-substituted morpholines whose substituents contain no more than seven C atoms, as solvents. In this process, a benzene fraction of boiling range between 75 and 85 DEG C and a toluene fraction of boiling range between 99 and 111 DEG C are removed from the starting material by pre-distillation. The benzene fraction is passed into the lower portion and the toluene fraction into the upper portion of the extractive distillation column, which is separated into two portions by a riser plate.
Inventors:
UUDO KURAUMYUNTSUNAA
HANSUUYUURUGEN FUORUMAA
HANSUUYUURUGEN FUORUMAA
Application Number:
JP40491290A
Publication Date:
December 13, 1999
Filing Date:
December 21, 1990
Export Citation:
Assignee:
KURUTSUPU KOTSUPAASU GMBH
International Classes:
B01D3/40; C07C7/08; C07C15/04; C07C15/06; C07C15/08; C10G7/08; (IPC1-7): C07C15/04; B01D3/40; C07C7/08; C07C15/06
Domestic Patent References:
| JP8176018A | ||||
| JP5855435A |
Other References:
【文献】西独国特許出願公開1568940(DE,A1)
Attorney, Agent or Firm:
Toshio Yano (2 outside)