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:
Jan. 16, 2007
Filed:
Aug. 30, 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
A process for continuously preparing 2-pyrrolidone by reacting gamma-butyrolactone with ammonia in the liquid phase in the presence of water, wherein the reaction is carried out at a temperature of from 275 to 300° C. and an absolute pressure of from 140 to 180 bar.