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:
May. 28, 1985
Filed:
Sep. 12, 1983
Applicant:
Inventor:
Michael Robinson, Wooton, GB;
Assignee:
Laporte Industries Limited, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
C01G / ; C01G / ; C01G / ; C01F / ;
U.S. Cl.
CPC ...
423 60 ; 423 59 ; 423 44 ; 423 62 ; 423133 ; 423135 ; 423136 ; 423D / ;
Abstract
In the fluidized bed chlorination of oxidic materials, for example minerals such as bauxite, tantalite, columbite, wolframite or scheelite, the separation of metal values giving vaporous chlorides at the reaction temperature is enhanced by maintaining a zone substantially free of chlorine in the fluidized bed, for example a zone at least 0.25 m in depth measured from the expanded bed surface. A high aspect ratio bed and counter current movement of the bed matter and the chlorine within the bed are preferably used.