Kinetics of reactions of cyanide and reduced sulfur species to form thiocyanate
Interactions of cyanide and reduced sulfur species in aqueous solution can produce thiocyanate. Kinetics of reaction of cyanide and polysulfide, and cyanide and thiosulfate were investigated. Initial rate kinetic data for reaction of cyanide and polysulfide showed the reaction is mixed order and tha...
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ftosti:oai:osti.gov:6166154 2023-07-30T04:02:56+02:00 Kinetics of reactions of cyanide and reduced sulfur species to form thiocyanate Luthy, R.G. Bruce, S.G. Jr. 2020-09-03 application/pdf http://www.osti.gov/servlets/purl/6166154 https://www.osti.gov/biblio/6166154 https://doi.org/10.2172/6166154 unknown http://www.osti.gov/servlets/purl/6166154 https://www.osti.gov/biblio/6166154 https://doi.org/10.2172/6166154 doi:10.2172/6166154 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY CYANIDES CHEMICAL REACTION KINETICS SULFIDES THIOCYANATES CHEMICAL REACTION YIELD THIOSULFATES AMMONIA CATALYSIS CHARS COAL FINES EXPERIMENTAL DATA ISOLATED VALUES PH VALUE CARBONIC ACID DERIVATIVES CHALCOGENIDES DATA DATA FORMS HYDRIDES HYDROGEN COMPOUNDS INFORMATION KINETICS NITROGEN COMPOUNDS NITROGEN HYDRIDES NUMERICAL DATA ORGANIC COMPOUNDS ORGANIC SULFUR COMPOUNDS REACTION KINETICS SULFUR COMPOUNDS YIELDS 2020 ftosti https://doi.org/10.2172/6166154 2023-07-11T10:45:36Z Interactions of cyanide and reduced sulfur species in aqueous solution can produce thiocyanate. Kinetics of reaction of cyanide and polysulfide, and cyanide and thiosulfate were investigated. Initial rate kinetic data for reaction of cyanide and polysulfide showed the reaction is mixed order and that the order decreases from 1.91 to 1.18 as pH increases from 8.2 to 12; this was largely accounted for by a decrease in reaction order with respect to cyanide as pH increases above the pK/sub a/ for hydrogen cyanide. Catalysis and inhibition studies showed that high concentrations of ammonia were inhibitory and that coal char fines were catalytic. The rate of reaction of cyanide and polysulfide is approximately three or more orders of magnitude faster than reaction of cyanide and thiosulfate depending on pH value. A neutral or slightly alkaline solution containing on the order 10/sup -3/ M or more total sulfide can form polysulfide on exposure to oxygen, and in the presence of cyanide there should be reaction to yield thiocyanate. 7 figures, 3 tables. Other/Unknown Material Carbonic acid SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY CYANIDES CHEMICAL REACTION KINETICS SULFIDES THIOCYANATES CHEMICAL REACTION YIELD THIOSULFATES AMMONIA CATALYSIS CHARS COAL FINES EXPERIMENTAL DATA ISOLATED VALUES PH VALUE CARBONIC ACID DERIVATIVES CHALCOGENIDES DATA DATA FORMS HYDRIDES HYDROGEN COMPOUNDS INFORMATION KINETICS NITROGEN COMPOUNDS NITROGEN HYDRIDES NUMERICAL DATA ORGANIC COMPOUNDS ORGANIC SULFUR COMPOUNDS REACTION KINETICS SULFUR COMPOUNDS YIELDS |
spellingShingle |
37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY CYANIDES CHEMICAL REACTION KINETICS SULFIDES THIOCYANATES CHEMICAL REACTION YIELD THIOSULFATES AMMONIA CATALYSIS CHARS COAL FINES EXPERIMENTAL DATA ISOLATED VALUES PH VALUE CARBONIC ACID DERIVATIVES CHALCOGENIDES DATA DATA FORMS HYDRIDES HYDROGEN COMPOUNDS INFORMATION KINETICS NITROGEN COMPOUNDS NITROGEN HYDRIDES NUMERICAL DATA ORGANIC COMPOUNDS ORGANIC SULFUR COMPOUNDS REACTION KINETICS SULFUR COMPOUNDS YIELDS Luthy, R.G. Bruce, S.G. Jr. Kinetics of reactions of cyanide and reduced sulfur species to form thiocyanate |
topic_facet |
37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY CYANIDES CHEMICAL REACTION KINETICS SULFIDES THIOCYANATES CHEMICAL REACTION YIELD THIOSULFATES AMMONIA CATALYSIS CHARS COAL FINES EXPERIMENTAL DATA ISOLATED VALUES PH VALUE CARBONIC ACID DERIVATIVES CHALCOGENIDES DATA DATA FORMS HYDRIDES HYDROGEN COMPOUNDS INFORMATION KINETICS NITROGEN COMPOUNDS NITROGEN HYDRIDES NUMERICAL DATA ORGANIC COMPOUNDS ORGANIC SULFUR COMPOUNDS REACTION KINETICS SULFUR COMPOUNDS YIELDS |
description |
Interactions of cyanide and reduced sulfur species in aqueous solution can produce thiocyanate. Kinetics of reaction of cyanide and polysulfide, and cyanide and thiosulfate were investigated. Initial rate kinetic data for reaction of cyanide and polysulfide showed the reaction is mixed order and that the order decreases from 1.91 to 1.18 as pH increases from 8.2 to 12; this was largely accounted for by a decrease in reaction order with respect to cyanide as pH increases above the pK/sub a/ for hydrogen cyanide. Catalysis and inhibition studies showed that high concentrations of ammonia were inhibitory and that coal char fines were catalytic. The rate of reaction of cyanide and polysulfide is approximately three or more orders of magnitude faster than reaction of cyanide and thiosulfate depending on pH value. A neutral or slightly alkaline solution containing on the order 10/sup -3/ M or more total sulfide can form polysulfide on exposure to oxygen, and in the presence of cyanide there should be reaction to yield thiocyanate. 7 figures, 3 tables. |
author |
Luthy, R.G. Bruce, S.G. Jr. |
author_facet |
Luthy, R.G. Bruce, S.G. Jr. |
author_sort |
Luthy, R.G. |
title |
Kinetics of reactions of cyanide and reduced sulfur species to form thiocyanate |
title_short |
Kinetics of reactions of cyanide and reduced sulfur species to form thiocyanate |
title_full |
Kinetics of reactions of cyanide and reduced sulfur species to form thiocyanate |
title_fullStr |
Kinetics of reactions of cyanide and reduced sulfur species to form thiocyanate |
title_full_unstemmed |
Kinetics of reactions of cyanide and reduced sulfur species to form thiocyanate |
title_sort |
kinetics of reactions of cyanide and reduced sulfur species to form thiocyanate |
publishDate |
2020 |
url |
http://www.osti.gov/servlets/purl/6166154 https://www.osti.gov/biblio/6166154 https://doi.org/10.2172/6166154 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
http://www.osti.gov/servlets/purl/6166154 https://www.osti.gov/biblio/6166154 https://doi.org/10.2172/6166154 doi:10.2172/6166154 |
op_doi |
https://doi.org/10.2172/6166154 |
_version_ |
1772813815156572160 |