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. 25, 1979
Filed:
Dec. 27, 1977
James D Bushnell, Berkeley Heights, NJ (US);
Exxon Research & Engineering Co., Florham Park, NJ (US);
Abstract
In a DILCHILL* dewaxing process employing rotary drum wax filters, the waxy slurry in the filters must be periodically dumped and the filters washed with hot solvent to remove wax fines which plug the cloth. The dumped slurry contains useful oil which can be recovered, with no detriment to the subsequent filter rate, by mixing the dumped slurry with the hot filter washings and recycling this mixture back into the DILCHILL dewaxing zone at one or more points therein wherein the temperature of the recycled mixture is from about 5.degree. to 50.degree. F. lower than the bulk temperature of the oil in the dewaxing zone and in an amount ranging from about 0.02 to 0.4 volumes of recycle per volume of feed.