A white sphere. insoluble in water and organic solvent, soluble in strong acidic and alkaline solutions,moisture adsorptive in air,not expanding and cracking after adsorbing water, with the characters of high strength, resitance to sulfate poisoning and good thermal stability.Used as acatalyst in the Klaus sulfur recovering unit for treating gases with sulfuric acid containing in pertroche mical and other industries , with its high inversion rate,long durability and effective de –sulfrizing on exhaust gases.

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