Invention Grant
- Patent Title: Process for the purification of caprolactam
- Patent Title (中): 己内酰胺纯化方法
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Application No.: US40904673Application Date: 1973-10-24
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Publication No.: US3882102APublication Date: 1975-05-06
- Inventor: IMMEL OTTO , SCHWARZ HANS-HELMUT
- Applicant: BAYER AG
- Assignee: Bayer Ag
- Current Assignee: Bayer Ag
- Priority: US40904673 1973-10-24; US19751471 1971-11-10
- Main IPC: C07D201/16
- IPC: C07D201/16 ; C07D41/06
Abstract:
The invention relates to a process for the purification of caprolactam which is obtained by rearrangement of cyclohexanone oxime in the gas phase in the presence of solid catalysts. The purification takes place by dissolving the crude lactam in benzene or in alkyl benzene with seven to eight carbon atoms and recrystallization whilst cooling.
Information query
