Removal of H.sub.2 S from sour gas streams with subsequent sulfu

Details Removal of H.sub.2 S from sour gas streams with subsequent sulfu Removal of H.sub.2 S from sour gas streams with subsequent sulfu

1982-12-20

1985-05-14

Thomas, Earl C.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423226, C01B 1705, B01D 5334

Patent

active

045171700

ABSTRACT:
A cyclic process for the removal of H.sub.2 S from a sour gaseous stream is disclosed, the process being characterized by the reaction of the H.sub.2 S to sulfur employing aqueous solutions of oxidizing polyvalent metal chelates of nitrilotriacetic acid, and by the recovery of the sulfur from the solutions with specific extractants. The extractants are selected from compounds (and mixtures thereof) having the formula C.sub.n H.sub.2(n+l), wherein n is a whole number from 4 through 8, and the recovery may be made prior or subsequent to regeneration of the polyvalent metal chelate solution.

REFERENCES:
patent: 3068065 (1962-12-01), Hartley et al.
patent: 3933993 (1976-01-01), Salemme
patent: 4009251 (1977-02-01), Meuly
patent: 4243648 (1981-01-01), Fenton
patent: 4390516 (1983-06-01), Blytas
patent: 4402930 (1983-09-01), Diaz
patent: 4414194 (1983-11-01), Blytas

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