Method of recovering sulfur from solid catalysts

Details Method of recovering sulfur from solid catalysts Method of recovering sulfur from solid catalysts

1987-06-29

1989-04-25

Stoll, Robert L.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423578R, 502 26, 502517, C01B 17027, B01J 3866

Patent

active

048246565

ABSTRACT:
A method for recovering sulfur from a solid sulfur-containing catalyst is disclosed which comprises contacting the catalyst with liquid anhydrous ammonia in order to leach the sulfur out of the catalyst, and form an ammonia-sulfur solution. The sulfur is recovered by separating the ammonia from the solution, preferably by evaporation. The catalyst used in this method is also rendered suitable for reuse. The principal utility of the invention is in the ultimate conversion of phosphogypsum, produced primarily in the fertilizer industry, into sulfur so that it can be recycled back into the industry.

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