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. 12, 2011
Filed:
May. 15, 2006
Jianjun Liu, Aurora, IL (US);
James a Counter, Thirroul, AU;
Dmitri L Kouznetsov, Aurora, IL (US);
David H Slinkman, Lombard, IL (US);
Jianjun Liu, Aurora, IL (US);
James A Counter, Thirroul, AU;
Dmitri L Kouznetsov, Aurora, IL (US);
David H Slinkman, Lombard, IL (US);
Nalco Company, Naperville, IL (US);
Abstract
An improved method and composition for producing aluminum hydroxide crystals in a Bayer process pregnant liquor, involve the addition of an emulsified crystallization modifier comprising a C-Cfatty acid, precursors, salts or blends thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier yields a commercially viable product in the presence and absence of a hydrocarbon oil which dissolves the fatty acid. Further, the modifier, prepared in either an emulsified form or as a fatty acid neat, facilitates formation of oxalate aggregates greater than 200 μm which may be readily screened out with minimum trihydrate loss.