A novel surfactant S-benzoyl-N,N-diethyldithiocarbamate synthesis and its flotation performance to galena

被引：82

作者：

Ma, Xin ^{[1
]}

Hu, Yuan ^{[1
]}

Zhong, Hong ^{[1
]}

Wang, Shuai ^{[1
]}

Liu, Guangyi ^{[1
]}

Zhao, Gang ^{[1
]}

机构：

[1] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2016年 / 365卷

基金：

国家高技术研究发展计划(863计划);

关键词：

Flotation; Dithiocarbamate; Galena; Density functional theory; THIOUREA COLLECTORS; CHELATING-AGENTS; SULFIDE MINERALS; ADSORPTION LAYER; COPPER SULFIDES; DITHIOCARBAMATE; XPS; COMPLEXES; THIONOCARBAMATE; XANTHATE;

D O I：

10.1016/j.apsusc.2016.01.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, a novel dithiocarbamate compound, S-benzoyl-N,N-diethyldithiocarbamate (BEDTC), was synthesized via one-pot reaction of diethylamine, carbon disulfide, sodium hydroxide and benzoyl chloride using abundant carbon disulfide as a solvent. Its flotation performance and adsorption mechanism on the galena was first investigated by flotation tests, adsorption quantity measurements, FTIR spectra, X-ray photoelectron spectra (XPS) and density functional theory (DFT) calculation. The flotation results illustrated that BEDTC exhibited stronger collecting power than the conventional sulphide collectors such as sodium diethyl dithiocarbamate (SEDTC) and sodium isobutyl xanthate (SIBX) and superior selectivity for galena against sphalerite. The adsorption data demonstrated that the adsorption affinity of BEDTC to galena was stronger than that of SEDTC and SIBX, and the preferable pH range for BEDTC adsorption on galena surfaces was 6-10. The results of FUR spectra and XPS indicated that the interaction of BEDTC with galena may be dominated by the chemical adsorption, which was further confirmed by DFT calculation. BEDTC probably acted as a bidentate ligand, bonding with lead through the thiol sulfur and carbonyl oxygen atoms to form two distinct adsorption geometries, one with the same Pb atom to form a six-membered ring complex, and the other with two different Pb atoms to form a "bullet" shape complex. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：342 / 351

页数：10

共 68 条

[1] EVALUATION OF FLOTATION COLLECTORS FOR COPPER SULFIDES AND PYRITE .1. COMMON SULFHYDRYL COLLECTORS [J].

ACKERMAN, PK ;

HARRIS, GH ;

KLIMPEL, RR ;

APLAN, FF .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 1987, 21 (1-2) :105-127

[2] Use of chelating agents as collectors in the flotation of copper sulfides and pyrite [J].

Ackerman, PK ;

Harris, GH ;

Klimpel, RR ;

Aplan, FF .

MINERALS & METALLURGICAL PROCESSING, 1999, 16 (01) :27-35

[3]

Albright TA, 2013, ORBITAL INTERACTIONS IN CHEMISTRY, 2ND EDITION, P1, DOI 10.1002/9781118558409

[4] Synthesis and characterization of copper(II), nickel(II) and cobalt(II) complexes with novel thiourea derivatives [J].

Arslan, H ;

Külcü, N ;

Flörke, U .

TRANSITION METAL CHEMISTRY, 2003, 28 (07) :816-819

[5]

Bawa S, 2009, INDIAN J CHEM B, V48, P142

[6] Synthesis of crosslinked starch-graft-polyacrylamide-co-sodium xanthate and its performances in wastewater treatment [J].

Chang, Qing ;

Hao, Xuekui ;

Duan, Lili .

JOURNAL OF HAZARDOUS MATERIALS, 2008, 159 (2-3) :548-553

[7] Computational simulation of adsorption and thermodynamic study of xanthate, dithiophosphate and dithiocarbamate on galena and pyrite surfaces [J].

Chen, Jianhua ;

Lan, Lihong ;

Chen, Ye .

MINERALS ENGINEERING, 2013, 46-47 :136-143

[8] Spectroscopic study of galena surface oxidation in aqueous solutions .1. Identification of surface species by XPS and ATR/FTIR spectroscopy [J].

Chernyshova, IV ;

Andreev, SI .

APPLIED SURFACE SCIENCE, 1997, 108 (02) :225-236

[9] XPS study of ion beam modified polyimide films [J].

Ektessabi, AM ;

Hakamata, S .

THIN SOLID FILMS, 2000, 377 :621-625

[10] Solution properties of thionocarbamate collectors [J].

Fairthorne, G ;

Fornasiero, D ;

Ralston, J .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 1996, 46 (1-2) :137-153

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