CHEMICAL ABSORBER FOR RENDERING HALOGEN-CONTAINING AND SOUR GASES HARMLESS AND METHOD OF MAKING OF CHEMICAL ABSORBER Russian patent published in 2006 - IPC B01J20/24 B01J20/32 

FIELD: chemical industry; sanitary cleaning of gas ejection.

SUBSTANCE: chemical absorber can be used for dry rendering gas mixtures harmless. Chemical absorber has timber chips processed by mixture of hydroxide water solution and sulphur-containing salt of one or more alkali metal. Degree of oxidation of sulphur in sulphur-containing salt doesn't exceed +4. Content of alkali metal hydroxide in absorber equals to 10-40 mass percent; content of sulphur is absorber equals to 1,5-6,5 mass percent. Timber chips used in absorber have thickness less or equal to 1 mm, width of 2 mm and wider and length of 50 mm and longer. To prepare chemical absorber, timber chips are soaked in hydroxide and sulfite and/or thiosulphate of alkali metal solution, kept in till swelling, impregnated and are subject to drying.

EFFECT: reduced cost.

8 cl, 3 tbl