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:
Nov. 22, 2005
Filed:
Nov. 22, 2002
Ulrich Müller, Neustadt, DE;
Hartwig Voss, Frankenthal, DE;
Erich Schubert, Bad Dürkheim, DE;
Friedrich Hill, Meckenheim, DE;
Hermann Petersen, Grünstadt, DE;
Ulrich Müller, Neustadt, DE;
Hartwig Voss, Frankenthal, DE;
Erich Schubert, Bad Dürkheim, DE;
Friedrich Hill, Meckenheim, DE;
Hermann Petersen, Grünstadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
In a process for concentrating an at least partially crystalline solid containing at least one zeolite in a mixture comprising at least one auxiliary, for example a template compound, and said solid, the mixture is ultrafiltrated in a step (II) to divide the mixture into a retentate and a permeate, the solids content in the retentate being higher than that in the mixture and the solids content in the permeate being lower than that in the mixture. This procedure allows auxiliaries, in particular template compounds, present in the permeate to be recycled into a crystallizing step (I) upstream of step (II).