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:
Apr. 08, 2008
Filed:
Jun. 25, 2003
Nicholas James Adams, Petit Couronne, FR;
Jan Lodewijk Maria Dierickx, Amsterdam, NL;
Gilbert Robert Bernard Germaine, Petit Couronne, FR;
Laurent Georges Huve, Amsterdam, NL;
David John Wedlock, Chester, GB;
Nicholas James Adams, Petit Couronne, FR;
Jan Lodewijk Maria Dierickx, Amsterdam, NL;
Gilbert Robert Bernard Germaine, Petit Couronne, FR;
Laurent Georges Huve, Amsterdam, NL;
David John Wedlock, Chester, GB;
Shell Oil Company, Houston, TX (US);
Abstract
The invention relates to a process to prepare a heavy and a light lubricating base oil from a partly isomerized Fischer-Tropsch derived feedstock, the feedstock having an initial boiling point of below 400° C. and a final boiling point of above 600° C. by (a) separating the fraction via distillation into a light base oil precursor fraction and a heavy base oil precursor fraction; (b) reducing the pour point of each separate base oil precursor fraction via dewaxing; and, (c) isolating the desired base oil products from the dewaxed oil fractions as obtained in step (b).