Timothy Bryan Kendron

US Patent:

47449691, May 17, 1988

Filed:

Dec 10, 1986

Appl. No.:

6/939964

Inventors:

Jerome H. Marten - Lakeland FL
Timothy J. Kendron - Lakeland FL

Assignee:

Florida Institute of Phosphate Research - Bartow FL

International Classification:

C01B 1750

US Classification:

423541R

Abstract:

The present invention relates to the coproduction of a combustible feed gas stream useable as an energy source and a sulfur-containing second gas stream useable as a feedstock for the production of sulfuric acid. The process includes heating coal in the presence of an oxygen-lean atmosphere under partial coal gasifying conditions to produce a solid carbonaceous char and a crude coal-gas stream. Sulfur-containing compounds are removed from the coal gas stream and converted to solid sulfur-containing materials. The solid sulfur-containing materials are combined with the solid carbonaceous char and gypsum to form a feed mixture. The non-gypsum portion of the feed mixture contains sufficient reducing potential to release substantially all of the sulfur in the gypsum as gaseous compounds of sulfur in a +4 or lower oxidation state. The feed mixture is heated under reducing conditions to produce a sulfur-containing second gas stream and a solid sintered product.