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:
Mar. 08, 2011
Filed:
Aug. 27, 2008
Applicants:
Tobias Wabnitz, Mannheim, DE;
Ricardo Ferre Gimenez, Neustadt, DE;
Robert Laubner, Mutterstadt, DE;
Ralf Stolle, Lampertheim, DE;
Inventors:
Tobias Wabnitz, Mannheim, DE;
Ricardo Ferre Gimenez, Neustadt, DE;
Robert Laubner, Mutterstadt, DE;
Ralf Stolle, Lampertheim, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 307/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a process for depolymerizing mixtures comprising mono- and/or diesters of polytetrahydrofuran in the presence of an acidic catalyst and of a C- to C-alcohol at temperatures of from 80 to 200° C. and a pressure of from 0.05 to 0.5 MPa, where the molar ratio of the C- to C-alcohol relative to the carboxyl groups present in the mixture is greater than 1.