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. 06, 2004
Filed:
Dec. 14, 2000
Applicant:
Inventors:
Hans Volkmar Schwarz, Waterloo, BE;
Markus Maurer, Ludwigshafen, DE;
Michael Sander, Ruhland, DE;
Eckhard Ströfer, Mannheim, DE;
Rene Leuthold, Hohenbocka, DE;
Burghard Hantel, Cosel, DE;
Siegfried Richter, Schraden, DE;
Jörg Therre, Worms, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshaften, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
Abstract
A process for working up distillation residues from the synthesis of tolylene diisocyanate by reaction of the distillation residues with water comprises reacting the TDI distillation residues with water in a continuous or semicontinuous process in a backmixed reactor in the presence of hydrolysate.