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:
Oct. 02, 2012
Filed:
Jun. 02, 2009
Jun Wang, Chengdu, CN;
Xiuzhen Wang, Chengdu, CN;
Zexian Song, Chengdu, CN;
Other;
Abstract
A method of extracting Te and bismuth oxide and recovering byproduct comprises: leaching raw materials with a Te content of ≧1.8% by utilizing a leaching system containing HSO, Cl, Br, NHand NaClO, reducing leach solution with SOgas by precipitation method after separating impurities from it, washing with concentrated hydrochloric acid to obtain tellurium precipitation (18), purifying to obtain Te with a purity of higher than 99.99%. The filtrate produced is used for extracting BiOwith a purity of higher than 99.99% when Bi content in the raw material is ≧2%. Acidic waste solution produced during the process could be returned to the leaching step for recycle.