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:
Nov. 22, 1977
Filed:
Apr. 10, 1975
Applicant:
Inventors:
Robin David Holliday, Daytona Beach, FL (US);
David John Milne, Highfields, AU;
Assignee:
Comalco Limited, Melbourne, AU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F / ; C01G / ;
U.S. Cl.
CPC ...
423136 ; 423135 ; 423148 ; 423149 ;
Abstract
Removal of iron from aluminous material such as bauxite is effected by treatment with a gas mixture comprising sulphur dioxide and carbon monoxide in a first step, followed by chlorination in a second step whereby ferric chloride is produced and removed by volatilization. Aluminium chloride of low iron content may be obtained from the purified aluminous material by chlorination.