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. 09, 1992
Filed:
Jul. 18, 1989
Applicant:
Inventors:
Gillian M Moody, Brighouse, GB;
Trevor K Hunter, Leeds, GB;
Christine A Rushforth, West Yorkshire, GB;
Assignee:
Allied Colloids Limited, , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
423111 ; 423122 ;
Abstract
A Bayer alumina recovery process is described in which lime is added at an intermediate or final wash stage of the red mud recovery circuit to improve flocculation, especially with flocculants having lower anionic content. The process is particularly useful with liquors containing high amounts of sodium carbonate and for process where the mud is settled by mud stacking.