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:
May. 09, 1978
Filed:
Jul. 05, 1977
Leonard R Watts, Nederland, TX (US);
Norman L Brewer, Rockaway Township, Morris County, NJ (US);
Texaco Inc., New York, NY (US);
Abstract
A process for dewaxing waxy petroleum distillate oil stock wherein one volume waxy oil stock is mixed with about 0.5-2 volumes aromatic hydrocarbon dewaxing solvent, and the oil/aromatic solvent mixture heated to a temperature for dissolving all solid wax therein, wherein the oil/aromatic solvent mixture is cooled at a rate of about 1.degree.-8.degree. F./min. to a selected separation temperature for precipitating wax crystals and forming a wax/oil/aromatic solvent mixture, wherein the wax/oil/aromatic solvent mixture is mixed with 0.5-2 volumes of ketone dewaxing solvent at said separation temperature for a residence time of about 15 seconds to two minutes for precipitating additional wax, and wherein solid wax and dewaxed oil are recovered as products of the process.