Patent ID: 7306775
Filing Date: 2007-12-11
Classification: B01D,B01J

Abstract:
1. A method for removing a halogen series gas, which comprises contacting a gas containing a halogen series gas with a granule in the presence of water, wherein the granule comprises from 60 to 99.9 mass % of a solid base and from 0.1 to 40 mass % of a carbonaceous material to the total mass amount of the granule, the halogen series gas enters into a reaction with water to form at least one kind selected from the group consisting of HF, HCl, HBr and HI, and wherein the solid base is sodium hydrogencarbonate and/or potassium hydrogencarbonate, and the granule contains from 0.1 to 10 mass % of a porous material, wherein the porous material is silica gel and/or zeolite having an average pore radius of from 0.1 to 50 nm and a pore volume of from 0.05 to 4 cm 3 /g.