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:
Mar. 24, 2015
Filed:
Sep. 05, 2014
Sunshine Kaidi New Energy Group Co., Ltd., Wuhan, CN;
Qianqian Liu, Wuhan, CN;
Yiming Han, Wuhan, CN;
Dechen Song, Wuhan, CN;
Li Xu, Wuhan, CN;
Bo Lai, Wuhan, CN;
Sunshine Kaidi New Energy Group Co., Ltd., Wuhan, CN;
Abstract
A method for recovering cobalt, ruthenium, and aluminum from spent Co—Ru/AlOcatalyst. First, Co—Ru/AlOspent catalyst is subjected to hydrocarbon removal, reaction with hydrogen, and alkali fusion to obtain a slag. The slag is subjected to acid leaching, precipitation of cobalt with oxalic acid or ammonium oxalate, reduction of cobalt oxalate, and dissolution of cobalt metal with nitric acid to obtain Co(NO).6 HO. The effluent of acid leaching is subjected to reaction with ethanol, filtration to obtain a filtrate and residue, dissolution of the residue with concentrated hydrochloric acid, and vacuum distillation to obtain β-RuCl.x HO. Aluminum hydroxide is prepared from the filtrate through carbonation and calcination. The cobalt yield is ≧97%; the ruthenium yield is ≧95%, and the aluminum yield is ≧92%.