Invention Grant
- Patent Title: Production method of N-vinyl-2-pyrrolidone
- Patent Title (中): N-乙烯基-2-吡咯烷酮的制备方法
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Application No.: US13109450Application Date: 2011-05-17
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Publication No.: US09096516B2Publication Date: 2015-08-04
- Inventor: Hideto Sugiura , Toru Inaoka , Shigeyuki Nozaki , Yoshihisa Oka
- Applicant: Hideto Sugiura , Toru Inaoka , Shigeyuki Nozaki , Yoshihisa Oka
- Applicant Address: JP Osaka
- Assignee: NIPPON SHOKUBAI CO., LTD.
- Current Assignee: NIPPON SHOKUBAI CO., LTD.
- Current Assignee Address: JP Osaka
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: JP2005-113523 20050411; JP2005-218778 20050728
- Main IPC: C07D201/16
- IPC: C07D201/16 ; B01D9/00 ; C07D207/267
Abstract:
A method for producing N-vinyl-2-pyrrolidone by crystallization including: controlling a water content in a feed N-vinyl-2-pyrrolidone solution at an inlet of a crystallizer so as to be not lower than 0.7% by weight and not higher than 10% by weight based on the total weight of the N-vinyl-2-pyrrolidone solution; and supplying the feed N-vinyl-2-pyrrolidone solution to a crystallization process.
Public/Granted literature
- US20110218344A1 PRODUCTION METHOD OF N-VINYL-2-PYRROLIDONE Public/Granted day:2011-09-08
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