FIXED-BED METHOD FOR PRODUCTION OF CHLORINE BY CATALYTIC GAS-PHASE OXIDATION OF HYDROGEN CHLORIDE

• Main Authors: HARTH KLAUS, WALSDORFF CHRISTIAN, FIENE MARTIN, ADAMI CHRISTOPH, STROFER ECHHARD
• Format: Patent
• Language: English
• Published: 16.06.2005
• Edition: 7
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a method for production of chlorine by catalytic gas-phase oxidation of hydrogen chloride on a catalytic fixed bed comprising the steps: a) a feed gas stream (I), containing hydrogen chloride and a feed gas stream (II), containing oxygen are prepared, b) the feed gas stream (I), the feed gas stream (II), optionally a recycle stream (Ia), containing hydrogen chloride, optionally an oxygen-containing recycle stream (IIa) and a recycle stream (III) are fed into an oxidation zone and hydrogen chloride oxidised in the presence of a catalyst arranged in the fixed bed to give chlorine, whereby a product gas stream (IV) is obtained containing chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapour, c) the recycle stream (III) is removed from the product gas stream (IV) and recycled to the oxidation zone, whereupon a product gas stream (IVa) remains. The ratio of the streams (III)/(IVa) is in general 0.005 to 3, preferably 0.2 to 1.5 and more preferably 0.4 to 1. The recycle stream (III) is preferably sucked off one or more of the gas streams (I), (II) and optionally (IIa) by means of a jet nozzle.