Process for the removal of H.sub.2 S from fluid streams using a

Details Process for the removal of H.sub.2 S from fluid streams using a Process for the removal of H.sub.2 S from fluid streams using a

1987-02-18

1989-02-28

Doll, John

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423227, 423228, 423513R, 4235731, C01B 1716, C01B 3120, C01B 1102

Patent

active

048083852

ABSTRACT:
The present invention relates to a cyclic continuous process and a composition for the removal of hydrogen sulfide from a variety of sour gas streams. The sour gas stream is contacted with an aqueous solution of a water-soluble organic polymeric chelate containing an oxidizing polyvalent metal, e.g., Fe(III). The sulfur in the hydrogen sulfide is converted to elemental sulfur and the iron in the polymeric chelate is reduced. The process includes removal of the elemental sulfur, and an inexpensive method for removing water and excess low molecular weight materials, e.g., materials having molecular weights below 500, preferably using ultrafiltration or dialysis, regeneration and recycle of the reactive polyvalent metal.

REFERENCES:
patent: 4002727 (1977-01-01), Sonoda et al.
patent: 4483843 (1984-11-01), Sonoda et al.
patent: 4518577 (1985-05-01), Klecka
patent: 4525338 (1985-06-01), Klee
patent: 4683076 (1987-07-01), Lampton, Jr. et al.
Chemical Engineering, Membrane Separation Processes, Jun. 14, 1984, vol. 91, No. 12 pp. 77,84.
Hackh's Chemical Dictionary, Fourth Edition, Jan. 1986 p. 138.
Kirk-Othmer Encyclopedia of Chemical Technology 3rd edition vol. 5 pp. 16-18 and 55-61.

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