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. 13, 1977
Filed:
Apr. 19, 1976
Applicant:
Inventors:
Hans-Georg Wegner, Toppenstedt, DT;
Maximilian Kunert, Neu-Wulmsdorf, DT;
Assignee:
Deutsche Texaco Aktiengesellschaft, Hamburg, DT;
Primary Examiner:
Int. Cl.
CPC ...
C07B / ; C10G / ;
U.S. Cl.
CPC ...
208 25 ; 260 / ;
Abstract
The useful process life of aqueous urea solutions used in mineral oil urea dewaxing processes may be significantly prolonged by contacting with an acidic ion exchange resin at least a portion of the urea solution recovered from n-paraffin-urea adduct decomposition. The useful life of these aqueous urea solutions is further enhanced by contacting the urea solution with activated carbon in addition to the ion exchange resin.