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:
Jul. 01, 2014
Filed:
Apr. 16, 2010
Kimberly Jantunen Cross, Hoffman Estates, IL (US);
Anoop Chengara, Hoffman Estates, IL (US);
Anthony G. Sommese, Aurora, IL (US);
Edward Maharaih, Calgary, CA;
Kimberly Jantunen Cross, Hoffman Estates, IL (US);
Anoop Chengara, Hoffman Estates, IL (US);
Anthony G. Sommese, Aurora, IL (US);
Edward Maharaih, Calgary, CA;
Nalco Company, Naperville, IL (US);
Abstract
Disclosed and claimed is a method for improving the froth quality and bitumen recovery in primary bitumen extraction processes by coagulant addition in the underwash feed water. Preferred coagulants are cationic or amphoteric polymers. Coagulant addition in the underwash feed water reduces the solids content reporting to the primary bitumen froth in a primary separation vessel (PSC). This treatment program can also be combined with dispersant addition in the dilution make-up feed water into a PSC. Preferred dispersants are low molecular weight anionic polymers.