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:
Jul. 13, 2010
Filed:
Jun. 04, 2004
Marco Bosch, Mannheim, DE;
Bernd Stein, Alsbach-Hähnlein, DE;
Matthias Frauenkron, Freinsheim, DE;
Ulrich Müller, Neustadt, DE;
Marco Bosch, Mannheim, DE;
Bernd Stein, Alsbach-Hähnlein, DE;
Matthias Frauenkron, Freinsheim, DE;
Ulrich Müller, Neustadt, DE;
BASF Aktiengessellschaft, , DE;
Abstract
An increase in the cutting hardness of a shaped body comprising a crystalline aluminosilicate is achieved by treating the shaped body with a gas comprising water vapor at from 100 to 600° C. and an absolute pressure of from 0.1 to 10 bar for a period of at least 20 hours, and this shaped body having an increased cutting hardness can be used in processes for chemical synthesis, in particular in a process for preparing triethylenediamine (TEDA) by reaction of ethylenediamine (EDA) and/or piperazine (PIP).