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. 08, 2005
Filed:
Nov. 20, 2002
Christian Walsdorff, Ludwigshafen, DE;
Martin Fiene, Niederkirchen, DE;
Christoph Adami, Weinheim, DE;
Eckhard Ströfer, Mannheim, DE;
Klaus Harth, Altleiningen, DE;
Christian Walsdorff, Ludwigshafen, DE;
Martin Fiene, Niederkirchen, DE;
Christoph Adami, Weinheim, DE;
Eckhard Ströfer, Mannheim, DE;
Klaus Harth, Altleiningen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing chlorine by catalytic gas-phase oxidation of hydrogen chloride over a fixed catalyst bed is disclosed that includes: making available a feed gas stream I with hydrogen chloride and an oxygen-containing feed gas stream II, feeding the feed gas stream I, the feed gas stream II, and, if desired, a recycled stream Ia with hydrogen chloride, an oxygen-containing recycle stream IIa, and a recycled stream III into an oxidation zone and oxidizing hydrogen chloride to chlorine in the presence of a catalyst present in a fixed bed to give product gas stream IV having chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapor, and taking the recycled stream III from the product gas stream IV, without further treatment, and recirculating it to the oxidation zone, leaving a product gas stream IVa.