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公开(公告)号：US3816295A
公开(公告)日：1974-06-11
申请号：US31527472
申请日：1972-12-14
Applicant: TEXACO INC
Inventor： SHILLINGLAW J , COLEMAN R , CUMMINS B
CPC classification number: C10G47/00 , C10G2400/10
Abstract: Improved lubricating oils are prepared by simultaneously solvent refining-deasphalting a vacuum residuum, hydrocracking the product and fractionating the hydrocracked oil to remove material having a viscosity SUS at 210* F of at least 300.
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