Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 49: Issue 3
The influence of activated carbon on the thermal decomposition of sodium ethyl xanthate
Authors:
J. G. Dunn The A. J. Parker Cooperative Research Centre for Hydrometallurgy School of Applied Chemistry, Curtin University, GPO Box U 1987, 6001 Perth

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A. C. Chamberlain The A. J. Parker Cooperative Research Centre for Hydrometallurgy School of Applied Chemistry, Curtin University, GPO Box U 1987, 6001 Perth

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N. G. Fisher The A. J. Parker Cooperative Research Centre for Hydrometallurgy School of Applied Chemistry, Curtin University, GPO Box U 1987, 6001 Perth

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J. Avraamides The A. J. Parker Cooperative Research Centre for Hydrometallurgy School of Applied Chemistry, Curtin University, GPO Box U 1987, 6001 Perth
Mineral Processing Laboratory, Department of Minerals and Energy, Bentley Delivery Centre, Kent St., Bentley, GPO Box 27, 6102 Perth, Western Australia

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Pages:
1399–1408
Online Publication Date:
01 Aug 1997
Publication Date:
01 Aug 1997
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf01983698
Keywords:
activated carbon; adsorption; sodium ethyl xanthate; thermal decomposition
Restricted access

Abstract

The thermal decomposition of SEX in a nitrogen atmosphere was studied by coupled thermogravimetry-Fourier transform infrared spectroscopy (TG-FTIR), and by pyrolysis-gas chromatography-mass spectrometry (py-GC-MS). The TG curve exhibited two discrete mass losses of 45.8% and 17.8% respectively, at 200 and 257–364°C. The evolved gases identified as a result of the first mass loss were carbonyl sulfide (COS), ethanol (C2H5OH), ethanethiol (C2H5SH), carbon disulfide (CS2), diethyl sulfide ((C2H5)2S), diethyl carbonate ((C2H5O)2CO), diethyl disulfide ((C2H5)2S2), and carbonothioic acid, O, S, diethyl ester ((C2H5S)(C2H5O)CO). The gases identified as a result of the second mass loss were carbonyl sulfide, ethanethiol, and carbon disulfide. Hydrogen sulfide was detected in both mass losses by py-GC-MS, but not detected by FTIR. The solid residue was sodium hydrogen sulfide (NaSH).

SEX was adsorbed onto activated carbon, and heated in nitrogen. Two discrete mass losses were still observed, but in the temperature ranges 100–186°C (7.8%) and 186–279°C (11.8%). Carbonyl sulfide and carbon disulfide were now the dominant gases evolved in each of the mass losses, and the other gaseous products were relatively minor. It was demonstrated that water adsorbed on the carbon hydrolysed the xanthate to cause the first mass loss, and any unhydrolysed material decomposed to give the second mass loss.

  • 1 La Brooy, S. R. and Bax, A. R., Proc. of the 13th Australian Chemical Engineering Conference, 1985 p. 187–191.

  • 2 La Brooy, S. R., Bax, A. R., Muir, D. M., Hosking, J. W., Hughes, H. C. and Parentich, A., Gold 100 MINTEK, 1986 p. 123–132.

  • 3 La Brooy, S. R., 1st International Conference on Hydrometallurgy, 1988, p. 466–470.

  • 4 Finar, I. L. 1973 Organic Chemistry The Fundamental Principles 6th edn. Longman London.

  • 5 Rao, S. R. 1971 Xanthates and Related Compounds Marcel Dekker Inc. New York.

  • 6 Tyden, I. 1966 Talanta 13 1353–1353. .

  • 7 G.Dunn, J., Avraamides, J., Chamberlain, A. C. and Fisher, N. G., Proc. AusIMM Annual Conference, 24–28 March, Perth, Western Australia, 1996 p. 163–166.

    • Search Google Scholar
    • Export Citation

  • 8 Ruane, M., Hinchcliffe, W., Hosking, J. W. and Muir, D. M., Western Australian Mining and Petroleum Research Institute, Report No 2, 1983.

    • Search Google Scholar
    • Export Citation

  • 9 Bellemy, L. J. 1975 The Infrared Spectra of Complex Molecules Chapman & Hall London.

  • 10 Nakanishi, K. 1977 Infrared Absorption Spectroscopy 2nd edn. Holden-Day San Francisco.

  • 11 Kagann, R. H. 1982 J. Molec. Spectr. 94 192–192. .

  • 12 Herzberg, G. 1945 Molecular Spectra and Molecular Structure van Nostrand Reinhold Co. Melbourne.

  • 13 Locker, J. R. Brukholder, J. B. Bair, E. J. 1983 J. Phys. Chem. 87 1864–1864. .

  • 14 Morrison, R. T. Boyd, R. N. 1992 Organic Chemistry 6th edn. Prentice Hall International Inc. London.

  • 15 Crozier, R. D. 1992 Flotation, Theory, Reagents and Ore Testing Pergamon Oxford.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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