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:
Jun. 13, 1989
Filed:
Oct. 21, 1987
Applicant:
Inventors:
Raymond N Yong, Beaconsfield, CA;
Amar J Sethi, Fort McMurray, CA;
Assignee:
Suncor, Inc., North York, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F / ; B03D / ;
U.S. Cl.
CPC ...
210731 ; 423122 ; 423 42 ; 423 55 ; 423 65 ; 423 92 ; 423140 ; 423158 ; 423184 ; 423111 ; 210729 ; 210728 ; 210705 ; 75-2 ; 252 60 ; 252 61 ; 536102 ; 536107 ; 127 33 ; 127 32 ; 127 70 ; 127 71 ;
Abstract
Modified starch compositions and their use for flocculating mineral waste residues, particularly the red mud containing alumina liquors from bauxite residues, comprising the addition to an alumina liquor of a flocculating amount of a methylated starch which, optionally, may be hydrolyzed, or a methylated starch which is also sulfonated and, optionally, may be hydrolyzed. Preferably, the methylated starch compositions are potato and dasheen starch derivatives prepared at temperatures of about 50.degree. to about 85.degree. C.