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:
Sep. 19, 1978
Filed:
Jul. 05, 1977
Charles W Harrison, Nederland, TX (US);
Paul P Bozeman, Jr, deceased, late of Groves, TX (US);
Texaco Inc., New York, NY (US);
Abstract
A solvent dewaxing process wherein a waxy oil charge, heated for melting wax therein, is cooled to a temperature about 5.degree.-15.degree. F below the cloud point, wherein the cooled waxy oil charge is mixed under conditions of good mixing with solvent having a temperature 20.degree.-40.degree. F above a selected separation temperature in a solvent to oil ratio of about 1:1 to 5:1 for precipitating wax from the resulting mixture, and wherein the wax/oil/solvent mixture is further cooled in a second cooling zone at a rate of ca. 1.degree.-8.degree. F./min to said selected separation temperature for precipitating additional wax. Precipitated wax is separated from the mixture at the separation temperature, producing a wax free solvent-oil solution. Dewaxed oil is recovered by fractionation from the wax free solvent-oil solution.