Mineral oils: processes and products – Refining – Sulfur removal
Patent
1985-07-31
1986-12-16
Metz, Andrew H.
Mineral oils: processes and products
Refining
Sulfur removal
208210, 208217, 208254H, C10G 6504
Patent
active
046295534
ABSTRACT:
A process wherein in a hydrofining zone, a sulfur- or nitrogen-containing distillate feed, or feed containing both sulfur and nitrogen, is hydrofined at hydrofining conditions sufficient to convert the sulfur and nitrogen to hydrogen sulfide, and ammonia, respectively, the hydrogen sulfide and ammonia are separated from the hydrofined product, and the hydrofined product contacted in a subsequent zone with hydrogen, or a hydrogen-containing gas over a catalyst which contains elemental iron and one or more alkali- or alkaline-earth metals at reaction conditions sufficient to reduce or restore the color of the hydrofined product. Operation in this manner permits hydrofining of the feed at higher severities, for longer periods, than heretofore possible because the adverse quality of the product reaction mixture normally caused by deterioration of the hydrofiner product at such conditions is remediated by treatment of the hydrofined product over the iron catalyst.
REFERENCES:
patent: 3340183 (1967-09-01), Egan
patent: 3382168 (1968-05-01), Wood et al.
patent: 3457163 (1969-07-01), Parker
patent: 3464915 (1969-09-01), Paterson et al.
patent: 3549520 (1970-12-01), Morris
patent: 4131537 (1978-12-01), Winter et al.
Hudson Carl W.
Markley Gerald E.
Exxon Research and Engineering Company
McFarlane Anthony
Metz Andrew H.
Proctor Llewellyn A.
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