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:
Apr. 19, 2016
Filed:
Aug. 11, 2015
Applicant:
Nova Chemicals (International) S.a., Fribourg, CH;
Inventors:
Assignee:
NOVA Chemicals (International) S.A., Fribourg, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 6/12 (2006.01); C10G 75/04 (2006.01); F28F 19/00 (2006.01); C08L 23/02 (2006.01); C08L 53/00 (2006.01); C08F 10/02 (2006.01);
U.S. Cl.
CPC ...
C08L 53/00 (2013.01); C08L 23/02 (2013.01); C10G 75/04 (2013.01); F28F 19/00 (2013.01);
Abstract
In the solution polymerization of ethylene co and homopolymers the solution leaving the reactor is heated to separate polymer from solvent and residual monomers. Fouling in the heat exchanger may be reduced by adding to the solution from 0.01 to 100 ppm by weight of a polyoxyalkylene compound of the formulaHO—(CHCHO)[CHCH(CH)O](CHCHO)Hwherein M, N and P each represent the average number of repeating units and M is from 0 to 20, N is from 2 to 50 and P is from 0 to 20 and passing the solution through a heat exchanger to increase its temperature by at least 20° C.