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. 04, 2008
Filed:
Sep. 09, 2004
Applicants:
Randolf Hugo, Dirmstein, DE;
Kirsten Wenz, Mannheim, DE;
Rolf Wambsganβ, Landau, DE;
Sabine Jourdan, Mannheim, DE;
Thomas Preiss, Weisenheim Am Sand, DE;
Inventors:
Randolf Hugo, Dirmstein, DE;
Kirsten Wenz, Mannheim, DE;
Rolf Wambsganβ, Landau, DE;
Sabine Jourdan, Mannheim, DE;
Thomas Preiss, Weisenheim Am Sand, DE;
Assignee:
BASF Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for preparing xylylenediamine by continuously hydrogenating liquid phthalonitrile over a heterogeneous catalyst in the presence of liquid ammonia in a reactor, which comprises mixing a stream of a phthalonitrile melt in liquid form by means of a mixer unit with a stream of liquid ammonia and conducting the liquid mixture into the hydrogenation reactor.