The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2007
Filed:
Nov. 15, 2002
Martin Rudloff, Weisenheim, DE;
Peter Stops, Altrip, DE;
Erhard Henkes, Einhausen, DE;
Helmut Schmidtke, Bensheim, DE;
Rolf-hartmuth Fischer, Heidelberg, DE;
Manfred Julius, Limburgerhof, DE;
Rolf Lebkücher, Mannheim, DE;
Karl-heinz Ross, Grünstadt, DE;
Martin Rudloff, Weisenheim, DE;
Peter Stops, Altrip, DE;
Erhard Henkes, Einhausen, DE;
Helmut Schmidtke, Bensheim, DE;
Rolf-Hartmuth Fischer, Heidelberg, DE;
Manfred Julius, Limburgerhof, DE;
Rolf Lebkücher, Mannheim, DE;
Karl-Heinz Ross, Grünstadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Process for the continuous preparation of N-methyl-2-pyrrolidone (NMP) by reacting gamma-butyrolactone (GBL) with monomethylamine (MMA) in the liquid phase, wherein GBL and MMA are used in a molar ratio of from 1:1.08 to 1:2 and the reaction is carried out at from 320 to 380° C. and an absolute pressure of from 70 to 120 bar.