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:
Dec. 08, 2009
Filed:
Nov. 29, 2005
Roland Möller, Hammersbach, DE;
Mario Gómez, Pfungstadt, DE;
Klaus Einmayr, Tacherting, DE;
Jens Hildebrand, Hildesheim, DE;
Hans-georg Erben, Stephanskirchen, DE;
Hans-peter Krimmer, Kirchweidach, DE;
Roland Möller, Hammersbach, DE;
Mario Gómez, Pfungstadt, DE;
Klaus Einmayr, Tacherting, DE;
Jens Hildebrand, Hildesheim, DE;
Hans-Georg Erben, Stephanskirchen, DE;
Hans-Peter Krimmer, Kirchweidach, DE;
AlzChem Trostberg GmbH, Trostberg, DE;
Abstract
The invention relates to a method for producing amino- or hydroxybenzonitriles during which, within the scope of an ammonolysis, the corresponding amino- or hydroxybenzoic acid compounds are reacted with ammonia in the presence of a phosphate-containing supported catalyst at temperatures between 250° C. and 500° C. The production step is carried out in a reaction gas without an organic solvent followed by at least a 2-stage purification step.