公开(公告)号：US3438887A

公开(公告)日：1969-04-15

申请号：US3438887D

申请日：1967-07-11

Applicant: TEXACO INC

Inventor： MORRIS HERBERT C ,  SEQUEIRA AVILINO JR

IPC: C10G65/04 ,  C10G67/04 ,  C10G43/14 ,  C10G31/14

CPC classification number: C10G65/043 ,  C10G2400/10

公开(公告)号：US3661772A

公开(公告)日：1972-05-09

申请号：US3661772D

申请日：1970-04-03

Applicant: TEXACO INC

Inventor： SEQUEIRA AVILINO JR ,  JOLLY JAMES P ,  REA WILLIAM E

IPC: C10G21/00 ,  C10G21/20 ,  C10G29/00

CPC classification number: C10G21/20 ,  C10G21/00

Abstract: MANUFACTURE OF NAPHTHENIC LUBRICATING OIL PRODUCT BY DISTILLATION OF CRUDE OIL CONTAINING NAPHTHENIC LUBRICATING OIL EFFECTING SEPARATION OF THE NAPHTHENIC LUBRICATING OIL STOCKS; REFINING LUBRICATING OIL STOCKS FOR REMOVAL OF CONSTITUENTS OF LOW VISCOSITY INDEX, LOW THERMAL STABILITY, AND POOR OXIDATION STABILITY BY SOLVENT EXTRACTION WITH AN AQUEOUS SOLVENT PHASE COMPRISING BETWEEN ABOUT 85 AND 98 WT. PERCENT N-METHYL-2-PYRROLIDONE AND BETWEEN ABOUT 2 AND 15 WT. PERCENT WATER AT CONDITIONS EFFECTIVE TO DISSOLVE AT LEAST 10 VOL. PERCENT PRODUCING AS A RAFFINATE A REFINED LUBRICATING STOCK OF SAID LUBRICATING OIL STOCKS OF IMPROVED VISCOSITY INDEX, THERMAL STABILITY AND OXIDATION STABILITY.