PREPARATION AND REPEATED REGENERATION OF MATERIAL CONTAINING AMORPHOUS IRON OXYHYDROXIDE, DESULFURIZATION AGENTS CONTAINING THE MATERIAL AND PREPARATION AND REPEATED REGENERATION THEREOF

摘要

A preparation method for material containing amorphous iron oxyhydroxide is provided. Said method includes: mixing an aqueous ferrous salt solution and hydroxide solution or solid hydroxides at the temperature of below 70℃, filtering the reaction solution, washing the filter cake, preparing suspension solution of the filter cake, blowing an oxygen-containing gas into the suspension solution to oxidize the ferrous iron, and then filtering and drying. The material after using as desulfurization agents can be repeatedly regenerated through oxidation in an oxygen-containing gas. A desulfurization agent, preparation and repeated regeneration thereof are also provided. Said desulfurization agent contains said material and organic binders, and may also include a small amount of additives. The organic binders are selected from sodium carboxymethyl cellulose, sesbania powder and cellulose powder, and the additives are selected from sawdust, rice husk powder and bran.