Mineral oils: processes and products – Refining – Sweetening
Patent
1977-03-04
1978-01-24
Crasanakis, George
Mineral oils: processes and products
Refining
Sweetening
208263, C10G 2706, C10G 1902
Patent
active
040702715
ABSTRACT:
A process is disclosed for the catalytic oxidation of mercaptans in a sour petroleum distillate containing difficultly oxidizable mercaptans, catalyst toxins and catalyst toxin precursors. The process comprises treating said distillate in contact with an alkaline solution and extracting naphthenic acids from the distillate; treating the substantially naphthenic acids-free distillate in contact with an oxidizing agent and an alkaline solution of a metal phthalocyanine catalyst, oxidizing the residual catalyst toxins and toxin precursors contained therein and converting a portion of the mercaptans to disulfides; passing the resulting reaction mixture through a bed of solid adsorbent particles and adsorbing the oxidized toxins and toxin precursors and the metal phthalocyanine solution thereon; treating the toxin-free and toxin precursor-free distillate in contact with an alkaline solution and a supported metal phthalocyanine catalyst in the presence of an oxidizing agent; and recovering a distillate substantially free of mercaptans.
REFERENCES:
patent: 2882224 (1959-04-01), Gleim et al.
patent: 2921020 (1960-01-01), Urban et al.
patent: 2988500 (1961-06-01), Gleim et al.
patent: 3371031 (1968-02-01), Strong
patent: 4033860 (1977-07-01), Carlson
Carlson David H. J.
Urban Peter
Crasanakis George
Hoatson Jr. James R.
Page II William H.
UOP Inc.
Welch Robert W.
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