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:
Aug. 20, 1996
Filed:
Jun. 29, 1994
Applicant:
Inventors:
Gillian M Moody, West Yorkshire, GB;
Clive Happs, Yorkshire, GB;
Assignee:
Allied Colloids Limited, West Yorkshire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F / ; C22B / ;
U.S. Cl.
CPC ...
423121 ; 423130 ;
Abstract
Bauxite that is to be used in the Bayer process for the recovery of alumina is washed with aqueous wash liquor having a caustic content of at least 50 g/l and which comprises aqueous caustic from the alumina recovery circuit of the Bayer process and, after removing organic material from the wash liquor, the wash liquor is included in the digestion stage, the separation stage or the alumina recovery circuit of the Bayer process.