Degradation of ethyl xanthate in flotation residues by hydrogen peroxide

Chen, Xing-hua, Hu, Yue-hua, Peng, Hong and Cao, Xue-feng (2015) Degradation of ethyl xanthate in flotation residues by hydrogen peroxide. Journal of Central South University, 22 2: 495-501. doi:10.1007/s11771-015-2548-0


Author Chen, Xing-hua
Hu, Yue-hua
Peng, Hong
Cao, Xue-feng
Title Degradation of ethyl xanthate in flotation residues by hydrogen peroxide
Journal name Journal of Central South University   Check publisher's open access policy
ISSN 2227-5223
2095-2899
Publication date 2015-02
Year available 2015
Sub-type Article (original research)
DOI 10.1007/s11771-015-2548-0
Open Access Status
Volume 22
Issue 2
Start page 495
End page 501
Total pages 7
Place of publication Changsha, China
Publisher Central South University
Collection year 2016
Language eng
Formatted abstract
The degradation behavior of ethyl xanthate (EX) salt was the most widely used collector in sulfide mineral flotation and emission of flotation tailings with residual EX was harmful to environment. In this work, hydrogen peroxide (H2O2) was investigated by UV-visible spectroscopy (UV/Vis) at different pH values from 3 to 12. For pH value from 5 to 12, EX was oxidized into ethyl per xanthate (EPX) by H2O2. Then EPX was further oxidized into thiosulfate (TS) salt rather than ethyl thiocarbonate (ETC) and this step was the reaction-limited step. Then depending on pH values, TS was degraded into sulphate and carbonate salts (pH>7) or elemental sulfur (pH<7). The kinetics data show that the degradation rate of EX increases with increasing the H2O2 concentration and is independent on the pH values. Without H2O2, EX is hydrolyzed to carbon disulfide fast at pH value <3.0, but the reaction of hydrolysis is undetectable at pH value >3.0 during test time.
Keyword ethyl-xanthate
hydrogen peroxide
thiosulfate
UV-visible spectroscopy
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2016 Collection
 
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