Desulfurizer for conversion and absorption of high-concentration carbonyl sulfide and a desulfurizer for catalytic conversion and absorption of carbon disulfide and their preparation methods

A method for preparing a desulfurizer, the method comprising:

• (1) mixing and reacting a FeSO4 solution with an alkaline substance solution or solid by controlling the alkali ratio of the alkaline substance solution or solid and the FeSO4 solution to 1-1.1 to form a first mixture, filtering the first mixture to yield a filter cake, and calcining the filter cake at a temperature of 250-400° C. to yield the magnetic iron oxide red Fe21.333O32;
• or
• mixing and kneading a FeSO4 solid with an alkaline substance solid by controlling the alkali ratio of the alkaline substance solid and the FeSO4 solid to 1-1.1 to form a first mixture, followed by washing with water and filtering the first mixture to yield a filter cake, and calcining the filter cake at a temperature of 250-400° C. to yield the magnetic iron oxide red Fe21.333O32;
• and
• (2) mixing 50-75 parts by weight of the magnetic iron oxide red Fe21.333O32 with 5-35 parts by weight of anatase type TiO2, 5-10 parts by weight of K2O and 5-10 parts by weight of a binder to form a second mixture, followed by roll molding at room temperature and drying the second mixture to produce the desulfurizer;
• wherein the anatase type TiO2 and K2O in Step (2) are prepared by mixing and calcining 6.1-42.7 parts by weight of metatitanic acid and 7.3-14.7 parts by weight of K2CO3 at a temperature of 500-700° C.