Patent ID: 6685901
Filing Date: 2004-02-03
Classification: A62D,B01D,B01J

Abstract:
A method for removing a halogen series gas, which comprises bringing a halogen series gas comprising a halogen element or a halogen compound into contact with a granulated product, wherein the granulated product is obtained by granulating a powder of a hydrogencarbonate having a mean particle diameter of primary particles of from 10 to 500 &mgr;m, and has a mean particle diameter of from 0.5 to 20 mm and an average hardness as defined below:in a case where the granulated product has a mean particle diameter of at least 0.5 mm and less than 1.0 mm, the average hardness of granulated product particles having particle diameters of at least 0.5 mm and less than 1.0 mm is at least 1 N; in a case where the granulated product has a mean particle diameter of at least 1.0 mm and less than 1.5 mm, the average hardness of granulated product particles having particle diameters of at least 1.0 mm and less than 1.5 mm is at least 4 N; in a case where the granulated product has a mean particle diameter of at least 1.5 mm and less than 2.0 mm, the average hardness of granulated product particles having particle diameters of at least 1.5 mm and less than 2.0 mm is at least 10 N; and in a case where the granulated product has a mean particle diameter of from 2.0 mm to 20 mm, the average hardness of granulated product particles having particle diameters of at least 2.0 mm is at least 30 N.