Invention Grant
- Patent Title: Purification of a crude lactam mixture by means of melt crystallization
- Patent Title (中): 通过熔融结晶纯化粗制内酰胺混合物
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Application No.: US12244452Application Date: 2008-10-02
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Publication No.: US07807826B2Publication Date: 2010-10-05
- Inventor: Axel Hengstermann , Ralf Meier , Bernd Günzel , Martin Roos , Stephan Schäflein , Bernd-Holger Modrow
- Applicant: Axel Hengstermann , Ralf Meier , Bernd Günzel , Martin Roos , Stephan Schäflein , Bernd-Holger Modrow
- Applicant Address: DE Essen
- Assignee: Evonik Degussa GmbH
- Current Assignee: Evonik Degussa GmbH
- Current Assignee Address: DE Essen
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: DE102007047322 20071002
- Main IPC: C07D225/00
- IPC: C07D225/00
Abstract:
The present invention provides a method for purifying laurolactam from a crude lactam mixture. In the method of the present invention, laurolactam is selectively crystallized by melt crystallization with controlled cooling of the crude lactam mixture.
Public/Granted literature
- US20090088567A1 PURIFICATION OF A CRUDE LACTAM MIXTURE BY MEANS OF MELT CRYSTALLIZATION Public/Granted day:2009-04-02
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