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:
Apr. 21, 2025
Filed:
Apr. 22, 2023
Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, CN;
Bo Li, Xining, CN;
Haitao Feng, Xining, CN;
Yaping Dong, Xining, CN;
Zhengrong Niu, Xining, CN;
Wu Li, Xining, CN;
Abstract
A method for directly preparing a trivalent chromium compound by electrochemical oxidation of ferrochrome is provided. The method includes: putting ferrochrome as an anode, and placing the anode into an electrolyte solution containing a complexing agent together with a cathode, then turning on a power supply for electrolysis reaction so that chromium and iron in ferrochrome are directly converted into free Crand Ferespectively, allowing one of Crand feto form a stable soluble metal complex together with the complexing agent, and allowing the other of Crand Feto form a metal hydroxide solid together with OHgenerated by electrolysis reaction, so as to obtain an electrolysis completion slurry. Compared with the prior art, the present application has no hexavalent chromium salt stage, thereby shortening the process flow and avoiding the generation of chromium-containing waste residue.