Title:
水溶液からのギ酸の除去方法
Document Type and Number:
Japanese Patent JP4001861
Kind Code:
B2
Abstract:
Formic acid is at least partly removed from an aqueous solution comprising formic acid, cyclohexanone and cyclohexanol by decomposition over certain decomposition catalysts. The method is preferably used for processing reaction products from the oxidation of cyclohexane and comprises: (i) extracting a product gas mixture obtained in the oxidation of cyclohexane with an aqueous scrubbing liquid, (ii) separating the aqueous solution obtained in (i) by distillation into an aqueous solution comprising formic acid, cyclohexanone and cyclohexanol together with further minor organic components and a carboxylic acid mixture (iii) removing the formic acid at least partially from the aqueous solution obtained in (ii) by decomposition, and (iv) further processing the aqueous solution obtained in (iii) to give epsilon-caprolactam, or using the aqueous solution obtained in (iii) as scrubbing liquid in (i).
Inventors:
Thomas nebel
Application Number:
JP2003503317A
Publication Date:
October 31, 2007
Filing Date:
June 10, 2002
Export Citation:
Assignee:
BASF Aktiengesellschaft
International Classes:
C07C27/26; B01D1/00; C07C29/80; C07C29/88; C07C35/08; C07C45/33; C07C45/85; C07C49/403; C07B61/00
Domestic Patent References:
| JP2000506134A | ||||
| JP2000505468A | ||||
| JP60153942A | ||||
| JP48096512A | ||||
| JP42001422B1 | ||||
| JP58219133A | ||||
| JP48043345B1 | ||||
| JP5271143A | ||||
| JP53059650A |
Other References:
SU1033431A,1983年
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel