Patent ID: 6436868
Filing Date: 2002-08-20
Classification: B01D,B01J

Abstract:
A composite catalyst composition for inhibiting the generation of dioxin, comprising:an iron compound comprising iron oxide particles or iron oxide hydroxide particles having an average particle size of 0.01 to 2.0 &mgr;m, a phosphorus content of not more than 0.005% by weight based on the weight of the particles, a sulfur content of not more than 0.1% by weight based on the weight of the particles and a sodium content of not more than 0.2% by weight based on the weight of the particles; and an acid gas neutralizing agent, said composite catalyst composition having a catalytic activity capable of decomposing not less than 25% by weight of monochlorobenzene when 50 mg of a composite material of iron oxide particles obtained by heat-treating said iron compound catalyst at 300Â° C. for 60 minutes in air, and said acid gas neutralizing agent is instantaneously contacted with 5.0Ã—10âˆ’7 mol of monochlorobenzene at 300Â° C. at a space velocity of 150,000 hâˆ’1 in an inert gas atmosphere using a pulse catalytic reactor.