Investigation of Dialkyldithiophosphate : an In-situ ATR-FTIR, UV/Vis, Raman and Surface Chemical Study
This Master thesis has been performed within Agricola Research Centre (ARC) at the department of Chemical and Metallurgical engineering at Luleå University of Technology. Flotation is an important mining industry process where the desired mineral is separated from the gangue. The aim of this process...
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ftluleatu:oai:DiVA.org:ltu-59278 2023-05-15T17:09:13+02:00 Investigation of Dialkyldithiophosphate : an In-situ ATR-FTIR, UV/Vis, Raman and Surface Chemical Study Lundstedt, Karin 2005 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59278 eng eng http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59278 Local fcee9d43-f049-48fb-a82d-2b9e3c909d61 info:eu-repo/semantics/openAccess Physics Chemistry Maths ATR IR spectroscopy dialkyldithiophosphate ZnS germanium flotation surface adsorption Fysik Kemi Matematik Student thesis info:eu-repo/semantics/bachelorThesis text 2005 ftluleatu 2022-10-25T20:51:52Z This Master thesis has been performed within Agricola Research Centre (ARC) at the department of Chemical and Metallurgical engineering at Luleå University of Technology. Flotation is an important mining industry process where the desired mineral is separated from the gangue. The aim of this process is to make the desired mineral hydrophobic in order for it to float to the surface. This is done by adding surface-active reactants, referred to as collectors. Although the flotation process has been used since the beginning of the last century there are still some uncertainties in the fundamental understanding of the reactions taking place at the surface of the mineral. In this thesis the surface properties of two dialkyldithiophosphate collectors, namely diethyldithiophosphate and dibutyldithiophosphate are studied. The amount of adsorption of dialkyldithiophosphate onto germanium and onto zinc sulphide are studied in-situ with Attenuated Total Reflection (ATR) Infrared Spectroscopy. ATR is a surface sensitive method suitable when working with water as solvent. While the expected adsorption of dialkyldithiophosphates onto germanium was not detected, adsorption was identified for dibutyldithiophosphate on zinc sulphide (the adsorption rates for this are presented in a kinetic plot). A comparison between the spectrum of dibutyldithiophosphate adsorbed on zinc sulphide to the precipitations of zinc and dibutyldithiophosphate is included in the discussion section. Validerat; 20101217 (root) Bachelor Thesis Luleå Luleå Luleå Luleå University of Technology Publications (DiVA) |
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collection |
Luleå University of Technology Publications (DiVA) |
op_collection_id |
ftluleatu |
language |
English |
topic |
Physics Chemistry Maths ATR IR spectroscopy dialkyldithiophosphate ZnS germanium flotation surface adsorption Fysik Kemi Matematik |
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Physics Chemistry Maths ATR IR spectroscopy dialkyldithiophosphate ZnS germanium flotation surface adsorption Fysik Kemi Matematik Lundstedt, Karin Investigation of Dialkyldithiophosphate : an In-situ ATR-FTIR, UV/Vis, Raman and Surface Chemical Study |
topic_facet |
Physics Chemistry Maths ATR IR spectroscopy dialkyldithiophosphate ZnS germanium flotation surface adsorption Fysik Kemi Matematik |
description |
This Master thesis has been performed within Agricola Research Centre (ARC) at the department of Chemical and Metallurgical engineering at Luleå University of Technology. Flotation is an important mining industry process where the desired mineral is separated from the gangue. The aim of this process is to make the desired mineral hydrophobic in order for it to float to the surface. This is done by adding surface-active reactants, referred to as collectors. Although the flotation process has been used since the beginning of the last century there are still some uncertainties in the fundamental understanding of the reactions taking place at the surface of the mineral. In this thesis the surface properties of two dialkyldithiophosphate collectors, namely diethyldithiophosphate and dibutyldithiophosphate are studied. The amount of adsorption of dialkyldithiophosphate onto germanium and onto zinc sulphide are studied in-situ with Attenuated Total Reflection (ATR) Infrared Spectroscopy. ATR is a surface sensitive method suitable when working with water as solvent. While the expected adsorption of dialkyldithiophosphates onto germanium was not detected, adsorption was identified for dibutyldithiophosphate on zinc sulphide (the adsorption rates for this are presented in a kinetic plot). A comparison between the spectrum of dibutyldithiophosphate adsorbed on zinc sulphide to the precipitations of zinc and dibutyldithiophosphate is included in the discussion section. Validerat; 20101217 (root) |
format |
Bachelor Thesis |
author |
Lundstedt, Karin |
author_facet |
Lundstedt, Karin |
author_sort |
Lundstedt, Karin |
title |
Investigation of Dialkyldithiophosphate : an In-situ ATR-FTIR, UV/Vis, Raman and Surface Chemical Study |
title_short |
Investigation of Dialkyldithiophosphate : an In-situ ATR-FTIR, UV/Vis, Raman and Surface Chemical Study |
title_full |
Investigation of Dialkyldithiophosphate : an In-situ ATR-FTIR, UV/Vis, Raman and Surface Chemical Study |
title_fullStr |
Investigation of Dialkyldithiophosphate : an In-situ ATR-FTIR, UV/Vis, Raman and Surface Chemical Study |
title_full_unstemmed |
Investigation of Dialkyldithiophosphate : an In-situ ATR-FTIR, UV/Vis, Raman and Surface Chemical Study |
title_sort |
investigation of dialkyldithiophosphate : an in-situ atr-ftir, uv/vis, raman and surface chemical study |
publishDate |
2005 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59278 |
genre |
Luleå Luleå Luleå |
genre_facet |
Luleå Luleå Luleå |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59278 Local fcee9d43-f049-48fb-a82d-2b9e3c909d61 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766065185992212480 |