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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.:

US 7618601 B1

PDFFull Text
Expired
Date of Patent:
Nov. 17, 2009

Filed:

Sep. 20, 2006

Process for enrichment of anatase mechanical concentrates in order to obtain synthetic rutile with low contents of rare earth and radioactive elements

Applicants:

Lino Rodrigues DE Freitas, Lagoa Santa, BR;

Ronaldo Moreira DE Horta, Belo Horizonte, BR;

Joao Alberto Lessa Tude, Salvador, BR;

Inventors:

Lino Rodrigues De Freitas, Lagoa Santa, BR;

Ronaldo Moreira De Horta, Belo Horizonte, BR;

Joao Alberto Lessa Tude, Salvador, BR;

Assignee:

Companhia Vale Do Rio Doce, Minas Gerais, BR;

Attorneys:

Arent Fox LLP

James Bindseil

Primary Examiner:

Scott Kastler

Assistant Examiner:

Alexander Polyansky

Int. Cl.
CPC ...
C01G 23/00 (2006.01); C01G 23/04 (2006.01); C01G 23/047 (2006.01); C01G 25/00 (2006.01); C01G 27/00 (2006.01); C22B 34/10 (2006.01); B03B 7/00 (2006.01); C01G 34/10 (2006.01);
U.S. Cl.
CPC ...
Abstract

A process for the enrichment of anatase mechanical concentrates, in order to obtain synthetic rutile with low contents of rare earth and radioactive elements, comprising the steps of: calcination of the anatase concentrate; reduction of the calcined product; dry or wet low-intensity magnetic separation of the reduced product; dry, high-intensity, high-gradient magnetic separation of the non-magnetic fraction from the low-intensity separation; leaching of the high-intensity magnetic fraction; oxidation of the dried product; leaching of the quenched product; filtering of the product from the second leaching; drying of the filtered product; and dry, high-intensity, high-gradient magnetic separation of the product of the second leaching.

Find Patent Forward Citations

Rodrigues De Freitas, Lino. (2009). Process for enrichment of anatase mechanical concentrates in order to obtain synthetic rutile with low contents of rare earth and radioactive elements (U.S. Patent No. 7618601). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7618601

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