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:
Aug. 09, 2011
Filed:
May. 10, 2007
Helmut Schmidtke, Bensheim, DE;
Ralph Versch, Speyer, DE;
Silke Simon, Wilmslow, GB;
Karl Ott, Plankstadt, DE;
Ronald Drews, Birkenau, DE;
Stephanie Mollner, Mannheim, DE;
Helmut Schmidtke, Bensheim, DE;
Ralph Versch, Speyer, DE;
Silke Simon, Wilmslow, GB;
Karl Ott, Plankstadt, DE;
Ronald Drews, Birkenau, DE;
Stephanie Mollner, Mannheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
Process for the continuous preparation of N-ethyl-2-pyrrolidone (NEP) by reacting gamma-butyrolactone (GBL) with monoethylamine (MEA) in the liquid phase, wherein GBL and MEA are used in a molar ratio in the range from 1:1.08 to 1:2 an the reaction is carried out at a temperature in the range from 320 to 420° C. and an absolute pressure in the range from 70 to 120 bar.