Title:
減圧においてアルカリ性のカプロラクタム生成物を蒸留する方法
Document Type and Number:
Japanese Patent JP4351908
Kind Code:
B2
Abstract:
A continuous process is provided for recovering caprolactam from aqueous caprolactam product which includes (i) caprolactam, (ii) impurities, and (iii) water by (a) adding alkali hydroxide to the aqueous caprolactam product, in an amount of not more than 100 mmol alkali hydroxide per kg of caprolactam; (b) reacting at least part of the added alkali hydroxide to form alkali amino caproate, to obtain a caproate-enriched caprolactam product; and (c) distilling the caproate-enriched caprolactam product at reduced pressure.
Inventors:
Grote Zefeld, Luize, Anne Maria
Vindels, Joseph, Johannes, Geraldas
Josten, Rita, Dinfina
Remens, Johannes, Albertas, Wilhelms
Mosterto, Ereco
Vindels, Joseph, Johannes, Geraldas
Josten, Rita, Dinfina
Remens, Johannes, Albertas, Wilhelms
Mosterto, Ereco
Application Number:
JP2003523225A
Publication Date:
October 28, 2009
Filing Date:
August 23, 2002
Export Citation:
Assignee:
DSM IP ASSETS B.V.
International Classes:
C07D223/10; C07D201/16; C07D233/10
Domestic Patent References:
| JP7330720A | ||||
| JP57192358A |
Attorney, Agent or Firm:
Yuichi Yamada
Masakazu Noda
Yoshinori Shimizu
Masakazu Noda
Yoshinori Shimizu
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