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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 9963353 B1

PDFFull Text
Date of Patent:
May. 08, 2018

Filed:

Jul. 22, 2014

Method for recovering alkali and aluminum in course of treatment of bayer red mud by using calcification-carbonation method

Applicant:

Northeastern University, Shenyang, Liaoning Province, CN;

Inventors:

Tingan Zhang, Shenyang, CN;

Guozhi Lv, Shenyang, CN;

Yan Liu, Shenyang, CN;

Zimu Zhang, Shenyang, CN;

Xiaofeng Zhu, Shenyang, CN;

Zhihe Dou, Shenyang, CN;

Assignee:

NORTHEASTERN UNIVERSITY, Shenyang, Liaoning Province, CN;

Attorney:

Muncy, Geissler, Olds & Lowe, P.C.

Primary Examiner:

Steven J Bos

Int. Cl.
CPC ...
C01F 7/00 (2006.01); C01F 7/47 (2006.01); B09B 3/00 (2006.01); C01D 1/04 (2006.01); C01F 7/16 (2006.01); C01F 7/20 (2006.01);
U.S. Cl.
CPC ...
C01F 7/47 (2013.01); B09B 3/00 (2013.01); C01D 1/04 (2013.01); C01F 7/16 (2013.01); C01F 7/20 (2013.01);
Abstract

A method for recovering alkali and aluminum during treatment of Bayer red mud using a calcification-carbonation method, including steps of mixing the Bayer red mud with calcium aluminate or with calcium aluminate and lime, performing calcification dealkalization conversion in a high-concentration alkaline liquor, and carbonizing the calcified residues produced during dealkalization to obtain carbonized residues; and then performing low-temperature aluminum dissolution, aluminum precipitation and the like to obtain calcium aluminate products, which is returned to the calcification dealkalization conversion of the red mud for recycling. Part of an alkali-containing and aluminum-containing liquid phase after calcification dealkalization conversion can be used as supplementary alkali in the Bayer production course for recycling. The method is energy-saving and environmentally-friendly, and allows recovering alkali and aluminum from the red mud and harmless treatment of the Bayer red mud.

Find Patent Forward Citations

Zhang, Tingan. (2018). Method for recovering alkali and aluminum in course of treatment of bayer red mud by using calcification-carbonation method (U.S. Patent No. 9963353). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9963353

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