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:
Jun. 05, 2018
Filed:
Nov. 05, 2013
Jx Nippon Oil & Energy Corporation, Tokyo, JP;
Kazuaki Hayasaka, Tokyo, JP;
Yoshiyuki Nagayasu, Tokyo, JP;
Marie Iwama, Tokyo, JP;
Mayumi Yokoi, Tokyo, JP;
Tomohisa Hirano, Tokyo, JP;
JX NIPPON OIL & ENERGY CORPORATION, Tokyo, JP;
Abstract
A method for producing a base oil for lubricant oils comprising: a first step of hydrocracking a stock oil having a content percentage of a heavy matter of 80% by mass or more so that a crack per mass of the heavy matter is 20 to 85% by mass, to obtain a hydrocracked oil comprising the heavy matter and a hydrocracked product thereof, a second step of fractionating the hydrocracked oil into a base oil fraction comprising the hydrocracked product and a heavy fraction comprising the heavy matter and being heavier than the base oil fraction, respectively, a third step of isomerization dewaxing the base oil fraction from the fractionation in the second step to obtain a dewaxed oil, wherein the heavy fraction from the fractionation in the second step is returned to the first step as a part of the stock oil.