The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1977
Filed:
Jul. 23, 1976
Applicant:
Inventor:
Louis E Kidwell, Jr, Shreveport, LA (US);
Assignee:
Pennzoil Company, Shreveport, LA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208 89 ;
Abstract
Production of White Oils of sufficient purity to pass the Hot Acid Carbonizable Substances Test and Ultraviolet Absorbance Test is carried out in two stages utilizing lubricating oil feedstock of a broad range of viscosities. The first stage hydrogenation utilizes a sulfur-resistant catalyst which produces an intermediate product of lower viscosity than the starting feedstock. The second stage hydrogenation catalyst is nickel on alumina and is further characterized as having a BET surface area in the range of 130-190 m.sup.2 /g. SU