Deasphalting with liquid hydrogen sulfide
AssigneeExxon Research & Engineering Co.
InventorsJohn J. Dugan, Jackson Eng
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Abstract
An asphalt-containing mineral oil is deasphalted by contacting the oil with a liquid hydrogen sulfide deasphalting solvent for a time sufficient to remove a substantial portion of the asphalt from the oil. Utilization of liquid hydrogen sulfide as the deasphalting solvent is capable of giving high yields of deasphalted oil. In contrast to the use of aliphatic solvents for deasphalting, the hydrogen sulfide readily mixes with the heavy feed even at relatively low temperatures.
Claims10
A process for deasphalting an asphalt-containing mineral oil which comprises contacting said oil with a liquid hydrogen sulfide deasphalting solvent to form two liquid-liquid immiscible phases, a solvent phase containing deasphalted oil and an asphalt phase.
A solvent deasphalting process which comprises contacting an asphalt-containing petroleum oil with a solvent consisting essentially of liquid hydrogen sulfide for a time sufficient to precipitate a substantial portion of said asphalt from said oil thereby forming two liquid-liquid immiscible phases, a solvent phase containing deasphalted oil and an asphalt phase, separating said phases and recovering a deasphalted oil from said solvent phase.
Dependencies are inferred from the claim text.