Abstract: A process for dewaxing a petroleum oil stock with a liquid solvent employing direct heat exchange cooling of solvent-oil mixture with an immiscible liquid chilling medium.
Type:
Grant
Filed:
January 18, 1982
Date of Patent:
March 1, 1983
Assignee:
Texaco Inc.
Inventors:
Charles W. Harrison, Herbert J. Pitman, Avilino Sequeira, Jr., John D. Begnaud
Abstract: Process for burning a pyrolyzed carbon containing solid in a staged turbulent bed to provide hot heat transfer material for use in pyrolyzing additional carbon containing solids.
Abstract: Heavy high-sulfur crude oil is subjected to distillation to produce gas and liquid hydrocarbon products and a residuum. The gas and liquid products are desulfurized. Part of the residuum is coked in a delayed coker, and sulfur in the coke is removed by high temperature calcination. The remainder of the residuum is air-blown to produce an asphalt product, and sulfur recovered from the other products is added to the asphalt to produce a sulfur-enriched asphalt product.
Abstract: An asphalt-containing mineral oil can be deasphalted at temperatures above about 80.degree. C. with methanol serving as the deasphalting solvent. Two liquid phases are produced, an asphalt-rich phase and a methanol-rich phase. By cooling the methanol-rich phase to a temperature below 80.degree. C., two additional liquid phases are produced, an oil-rich phase and a methanol-rich phase.
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