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:
Dec. 07, 2004
Filed:
Oct. 19, 2001
Applicant:
Inventors:
Brent England Beasley, Baton Rouge, LA (US);
Randall Stephen Lachine, Brights Grove, CA;
Assignee:
ExxonMobil Research & Engrg. Co., Annandale, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G 7/302 ; C10G 2/920 ; C10G 7/306 ; C10G 7/332 ; G01K 1/106 ;
U.S. Cl.
CPC ...
C10G 7/302 ; C10G 2/920 ; C10G 7/306 ; C10G 7/332 ; G01K 1/106 ;
Abstract
A laser beam reflected by wax crystals is used in determining the wax crystallization temperature of a hot dewaxing solvent upstream of solvent chillers. This is automatically achieved by an on-line method from a remote control point, in which a slipstream of solvent is passed through an attached solvent loop into a sample chamber in the loop, without being exposed to ambient conditions. As the sample is cooled, the beam reflections are detected and indicate the wax to crystallization temperature. Corrective measures can then be taken to prevent fouling of the chillers, if need be.