Process for the production of white oils
AssigneeUop LLC
InventorsDusan J. Engel, Bipin V. Vora
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Abstract
A white oil product is produced by hydrogenating a hydrocarbon stream produced from an aromatic alkylation process. The hydrogenation occurs at hydrogenation conditions in the presence of a catalyst comprising a platinum group metal component surface impregnated on a refractory oxide catalyst support. The platinum group metal component is surface impregnated such that the platinum group metal is essentially all located with a 100 micron layer of the surface of the catalyst support.
Claims11
A single reaction step hydrogenation process for producing a hydrocarbon white oil which process comprises contacting a feed stream comprising C.sub.15 -C.sub.50 hydrocarbons obtained directly from an aromatic alkylation process without any intermediate hydrotreating steps for the purpose of removing sulfurous components with a hydrogenation catalyst comprising a platinum group metal component that has been surface impregnated upon an alumina support to form an alumina catalyst particle in such a manner that the concentration of the platinum group metal on the outer 25 volume percent [vol. %] of the alumina catalyst particle is at least twice as great as the concentration of the platinum group metal component on the inner 25 volume per cent [vol. %] of the alumina catalyst particle with the contacting occurring in a hydrogenation reaction zone operating at a temperature of from 125.degree. to 300.degree. C., a pressure of from 10 to 150 atmospheres, a liquid hourly space velocity of from 0.05 to 5 hr.sup.-1,and a hydrogen-to-hydrocarbon molar feed ratio of from 2 to 15, and recovering the white oil produced in the hydrogenation reaction zone.
A hydrogenation process for producing a hydrocarbon white oil which comprises contacting a feed stream which is essentially free of sulfur and which comprises 70 to 100 wt. % alkylaromatic and 0 to 30 wt. % paraffinic, olefinic and naphthenic C.sub.15 -C.sub.50 hydrocarbons obtained from an aromatic alkylation process with a hydrogenation catalyst comprising from 0.05 to 5.0 wt. % of a surface-impregnated platinum component and from 0.1 to 5.0 wt. % of a lithium, sodium, or potassium component on a gamma-alumina support particle where the surface-impregnated platinum is located on the gamma-alumina particle in such a manner that the platinum concentration on the outer 25 vol. % of the gamma-alumina catalyst particle is at least twice that of the platinum concentration in the inner 25 vol. % of the gamma-alumina catalyst particle with the contacting occurring in a hydrogenation reaction zone operating at hydrogenation reaction conditions including a temperature of from 125.degree. to 300.degree. C., a pressure of from 10 to 150 atmospheres, a liquid hourly space velocity of from 0.1 to 5.0 hr.sup.-1, and a hydrogen-to-hydrocarbon molar feed ratio of from 2 to 15 and recovering the white oil product produced therefrom.
Dependencies are inferred from the claim text.