Title:
【発明の名称】アンモニア蒸留方法
Document Type and Number:
Japanese Patent JP2002521349
Kind Code:
A
Abstract:
The present invention relates to an improved process for distilling ammonia from a mixture, more particular from a mixture resulting from the reaction between aminonitrile and water (which reaction is also called cyclizing hydrolysis). The process for distilling the ammonia contained in an aqueous caprolactam solution, uses a column with a bottom temperature less than or equal to 160° C. and at an absolute pressure less than or equal to 5 bar, the ammonia distilled at the top of the column being compressed to a pressure greater than or equal to 10 bar and then condensed at a temperature of 25° C. to 60° C.
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Inventors:
Gerald Bokne
Patrick Ussier
Patrick Ussier
Application Number:
JP2000561131A
Publication Date:
July 16, 2002
Filing Date:
July 15, 1999
Export Citation:
Assignee:
Rhodia Polyamide Intermedium
International Classes:
B01D1/28; B01D3/00; C01C1/02; C01C1/10; C07D223/10; C07D201/16; (IPC1-7): C07D223/10; B01D3/00; C01C1/02
Attorney, Agent or Firm:
Motohiro Kurauchi (1 outside)