Patent ID: 6071488
Filing Date: 2000-06-06
Classification: B01J,C01B,Y02P

Abstract:
A process for recovering chlorine from a feed stream containing hydrogen chloride comprises the steps of:a) providing an oxidation reactor,b) providing and delivering a carrier catalyst to form a bed in said oxidation reactor and operating said bed at temperatures between about 300 and 420.degree. C.; said carrier catalyst comprising metallic chlorides, metallic hydroxy chloride and metallic oxide impregnated in a particulate, porous fluidizable solid material, wherein said solid material can adsorb and desorb hydrogen chloride, and is selected from the group consisting of zeolite, alumina, silica, carbon, and mixtures thereof,c) supplying said feed stream containing hydrogen chloride and an oxygen bearing gas to fluidize said oxidation reactor bed, and to exothermically react with each other in the presence of the metallic chlorides, metallic oxide and the metallic hydroxy chloride in the carrier catalyst to produce an overhead gas stream of chlorine, unreacted hydrogen chloride, inerts, water and residual oxygen;d) removing, cooling and compressing the overhead gas stream, wherein said overhead gas stream contains some entrained carrier catalyst;e) removing and cooling the carrier catalyst from the oxidation reactor bed;f) combining the cooled, compressed overhead gas stream of step d) and the cooled carrier catalyst of step e) at a position which is below the top level of the oxidation reactor bed to form a mixture;g) carrying said mixture into a high velocity transporter at temperature between 150.degree. C. and 250.degree. C., wherein the hydrogen chloride in the overhead gas stream part of the mixture reacts with the metallic oxide in the carrier catalyst part of the mixture to substantially eliminate the hydrogen chloride from said mixture;h) and removing the carrier catalyst from the resulting mixture of step g) thereby forming a gaseous product stream including chlorine, oxygen, inerts and water vapor, and recycling said removed carrier catalyst directly to said bed in said oxidation reactor.