Selective removal and recovery of ammonia and hydrogen sulfide

Details Selective removal and recovery of ammonia and hydrogen sulfide Selective removal and recovery of ammonia and hydrogen sulfide

1982-04-09

1983-11-08

Gantz, Delbert E.

Mineral oils: processes and products

Refining

Sulfur removal

208254H, 55 70, 55 73, C10G 4502, C10G 3108, B01D 300

Patent

active

044141033

ABSTRACT:
A hydrocarbon material is subjected to severe hydrotreatment and washed with only enough water to absorb the bulk of the H.sub.2 S but only a fraction of the NH.sub.3 present in the hydrocarbon material. The washed hydrotreated hydrocarbon material is separated from the water stream, and then a vapor phase is separated from the hydrocarbon material in a high pressure separator. The vapor phase is scrubbed with water to form an aqueous solution of NH.sub.3 which contains only a minor amount of H.sub.2 S (an NH.sub.3 to H.sub.2 S ratio of at least 6:1).

REFERENCES:
patent: 3340182 (1967-09-01), Berkman et al.
patent: 3356608 (1967-12-01), Franklin
patent: 3365374 (1968-01-01), Short et al.
patent: 3518166 (1970-06-01), Klett
patent: 3531395 (1970-09-01), Urban
patent: 3972693 (1976-08-01), Wiesner et al.
patent: 4088735 (1978-05-01), Bratzler et al.
patent: 4287051 (1981-09-01), Curtin

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