Title:
カプロラクタムの精製法
Document Type and Number:
Japanese Patent JP4850320
Kind Code:
B2
Abstract:
Process for purifying an aqueous caprolactam mixture by extracting the caprolactam with the aid of an organic caprolactam solvent that is not miscible with water in a benzene extraction, and releasing the caprolactam from the organic solvent by means of extraction with water, with the formation of an aqueous caprolactam solution, in a back extraction, with at least a separate pre-extraction taking place before the benzene extraction and/or the back extraction, in which, in a pre-extraction before the benzene extraction, an organic solvent that is not miscible with water is used for the extraction and, in a pre-extraction before back extraction, water is used for the extraction.
More Like This:
| JP2506021 | PURIFICATION OF CAPROLACTAM |
| WO/2010/020441 | CONTINUOUS METHOD FOR THE EXTRACTION OF POLYAMIDE 6 |
Inventors:
Simmons, Antonius, Jacobs, Franciscus
Groot Zebert, Luis, Anne Marie
Groot Zebert, Luis, Anne Marie
Application Number:
JP54038698A
Publication Date:
January 11, 2012
Filing Date:
March 16, 1998
Export Citation:
Assignee:
DSM IP ASSETS B.V.
International Classes:
C07D201/16
Domestic Patent References:
| JP7053510A | ||||
| JP49035391A | ||||
| JP2215767A |
Foreign References:
| US3761467 |
Attorney, Agent or Firm:
Yuichi Yamada
Masakazu Noda
Yoshinori Shimizu
Ikeda adult
Hiroto Kido
Masato Ikeda
Masakazu Noda
Yoshinori Shimizu
Ikeda adult
Hiroto Kido
Masato Ikeda