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Seshu Dharmavaram - One of the best experts on this subject based on the ideXlab platform.
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Oleum and chlorosulfonic acid spill tests preliminary field data for model validation
Process Safety Progress, 2008Co-Authors: Seshu DharmavaramAbstract:Oleums are mixtures of sulfur trioxide in sulfuric acid and are produced in several strengths. Chlorosulfonic acid (CSA) is formed by reacting sulfur trioxide with hydrochloric acid (HCl). These chemicals are used as sulfating and sulfonating agents in many applications. When accidentally released from vessels or pipes, they react instantaneously with water available from all sources like atmosphere, concrete, soil, and so forth, to form a fine acid mist that disperses downwind, based on atmospheric conditions. Unlike most other chemicals, the vaporization of sulfur trioxide from Oleum spills depends not just on its partial pressure, but a variety of conditions. Complex chemical reaction and heat generation that occur in the liquid phase determine the amount of sulfur trioxide released above a pool of liquid. The sulfur trioxide or CSA vapors then react instantaneously with the moisture in the atmosphere generating sulfuric acid and/or HCl and heat. Water and/or foam are used effectively in mitigating Oleum and CSA spills. However, very limited laboratory or field data are currently available that describe the complex behavior of these chemicals. Several theoretical models have been developed to predict the vaporization and dispersion of the chemical upon loss of containment. These models and methods have not been validated. In this article, details are provided on field tests conducted in Nevada in 2003 and 2006 for spills of 65% Oleum and CSA. A description of the spill mitigation, field measurement methods, and some preliminary results are included. © 2008 American Institute of Chemical Engineers Process Saf Prog, 2008
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Oleum and Chlorosulfonic acid spill tests—preliminary field data for model validation
Process Safety Progress, 2008Co-Authors: Seshu DharmavaramAbstract:Oleums are mixtures of sulfur trioxide in sulfuric acid and are produced in several strengths. Chlorosulfonic acid (CSA) is formed by reacting sulfur trioxide with hydrochloric acid (HCl). These chemicals are used as sulfating and sulfonating agents in many applications. When accidentally released from vessels or pipes, they react instantaneously with water available from all sources like atmosphere, concrete, soil, and so forth, to form a fine acid mist that disperses downwind, based on atmospheric conditions. Unlike most other chemicals, the vaporization of sulfur trioxide from Oleum spills depends not just on its partial pressure, but a variety of conditions. Complex chemical reaction and heat generation that occur in the liquid phase determine the amount of sulfur trioxide released above a pool of liquid. The sulfur trioxide or CSA vapors then react instantaneously with the moisture in the atmosphere generating sulfuric acid and/or HCl and heat. Water and/or foam are used effectively in mitigating Oleum and CSA spills. However, very limited laboratory or field data are currently available that describe the complex behavior of these chemicals. Several theoretical models have been developed to predict the vaporization and dispersion of the chemical upon loss of containment. These models and methods have not been validated. In this article, details are provided on field tests conducted in Nevada in 2003 and 2006 for spills of 65% Oleum and CSA. A description of the spill mitigation, field measurement methods, and some preliminary results are included. © 2008 American Institute of Chemical Engineers Process Saf Prog, 2008
Mathias S. Wickleder - One of the best experts on this subject based on the ideXlab platform.
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Tellurium Sulfates from Reactions in Oleum and Sulfur Trioxide: Syntheses and Crystal Structures of TeO(SO4), Te4O3(SO4)5, and Te(S2O7)2.
ChemInform, 2015Co-Authors: Christian Logemann, Joern Bruns, Lisa Verena Schindler, Vanessa Zimmermann, Mathias S. WicklederAbstract:TeO(SO4) is prepared by reaction of K2TeO4 with Oleum (65% SO3) (evacuated glass ampoules, 250 °C, 1 d).
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oxidizing elemental platinum with Oleum under harsh conditions the unique tris disulfato platinate iv pt s2o7 3 2 anion
ChemInform, 2014Co-Authors: Joern Bruns, Thorsten Kluener, Mathias S. WicklederAbstract:Direct oxidation of elemental Pt by Oleum (65% SO3) in the presence of BaCO3 yields yellow single crystals of Ba[Pt(S2O7)3] (H2SO4)0.5 (H2S2O7)0.5 (sealed glass ampoule, 160 °C).
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Oxidizing Elemental Platinum with Oleum under Harsh Conditions: The Unique Tris(disulfato)platinate(IV) [Pt(S2O7)3]2‐ Anion.
ChemInform, 2014Co-Authors: Joern Bruns, Thorsten Kluener, Mathias S. WicklederAbstract:Direct oxidation of elemental Pt by Oleum (65% SO3) in the presence of BaCO3 yields yellow single crystals of Ba[Pt(S2O7)3] (H2SO4)0.5 (H2S2O7)0.5 (sealed glass ampoule, 160 °C).
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reaction with Oleum under harsh conditions characterization of the unique m s2o7 3 2 ions m si ge sn in a2 m s2o7 3 a nh4 ag
ChemInform, 2013Co-Authors: Christian Logemann, Daniel Gunzelmann, Thorsten Kluener, Juergen Senker, Mathias S. WicklederAbstract:The title compounds are synthesized by reactions of MCl4 (M: Si, Ge, Sn) and A2SO4 (A: NH4, Ag) with Oleum (65% SO3; sealed glass tube, 250 °C, 24 h).
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Stabilizing Low-Valent Refractory Metals in a Strongly Oxidizing Medium: The First Molybdenum(V) Sulfate - MoO(HSO4)(SO4) - From Mo(CO)6 in Oleum.
ChemInform, 2011Co-Authors: Ulf Betke, Kai Neuschulz, Mathias S. WicklederAbstract:Deep-blue single crystals of MoO(HSO4)(SO4) are prepared from Mo(CO)6 in Oleum (sealed glass ampule, 200 °C, 2 d).
Joern Bruns - One of the best experts on this subject based on the ideXlab platform.
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Tellurium Sulfates from Reactions in Oleum and Sulfur Trioxide: Syntheses and Crystal Structures of TeO(SO4), Te4O3(SO4)5, and Te(S2O7)2.
ChemInform, 2015Co-Authors: Christian Logemann, Joern Bruns, Lisa Verena Schindler, Vanessa Zimmermann, Mathias S. WicklederAbstract:TeO(SO4) is prepared by reaction of K2TeO4 with Oleum (65% SO3) (evacuated glass ampoules, 250 °C, 1 d).
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oxidizing elemental platinum with Oleum under harsh conditions the unique tris disulfato platinate iv pt s2o7 3 2 anion
ChemInform, 2014Co-Authors: Joern Bruns, Thorsten Kluener, Mathias S. WicklederAbstract:Direct oxidation of elemental Pt by Oleum (65% SO3) in the presence of BaCO3 yields yellow single crystals of Ba[Pt(S2O7)3] (H2SO4)0.5 (H2S2O7)0.5 (sealed glass ampoule, 160 °C).
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Oxidizing Elemental Platinum with Oleum under Harsh Conditions: The Unique Tris(disulfato)platinate(IV) [Pt(S2O7)3]2‐ Anion.
ChemInform, 2014Co-Authors: Joern Bruns, Thorsten Kluener, Mathias S. WicklederAbstract:Direct oxidation of elemental Pt by Oleum (65% SO3) in the presence of BaCO3 yields yellow single crystals of Ba[Pt(S2O7)3] (H2SO4)0.5 (H2S2O7)0.5 (sealed glass ampoule, 160 °C).
Nuzov Bg - One of the best experts on this subject based on the ideXlab platform.
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Effect of miliacin oil on healing of trophic ulcers
Patologicheskaia fiziologiia i èksperimental'naia terapiia, 1994Co-Authors: Nuzov Bg, Stadnikov AaAbstract:: The effects of miliaceum oil used for tropical application to trophic ulcer were studied for the first time. The oil was obtained from millet processing waste products. Experiments on 73 rats with induced trophic ulcers demonstrated that the agent under study had a marked antiinflammatory effect and substantially activated reparative processes. The period of trophic ulcer healing was reduced by 12-16 days with the milliaceum oil as compared with Oleum Hippophae and Oleum Rosae.
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Effect of miliacin oil in the treatment of trophic ulcers
Patologicheskaia fiziologiia i èksperimental'naia terapiia, 1991Co-Authors: Nuzov BgAbstract:: The effect of topical treatment of trophic ulcers with Oleum miliacei was studied for the first time on 87 albino rats and 74 rabbits. The oil is obtained from millet scraps which are a by-product of groats processing. Oleum miliacei was found to possess a marked antiinflammatory property and stimulate considerably regeneration processes. The therapeutic effect of Oleum miliacei was higher than that of Oleum hippophae and Oleum rosae. In treatment with this oil the term of healing of the ulcers reduced, on the average, by 12 and 16 days in rats and by 18 and 23 days in rabbits.
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The effect of millet oil on the regeneration process in trophic ulcers
Farmakologiia i toksikologiia, 1990Co-Authors: Nuzov BgAbstract:: The effect of the local use of Oleum Miliacei on the regenerative processes of trophic ulcers was studied for the first time on 74 rabbits. Oleum Miliacei is obtained from millet scraps, a by-product of groat processing. The experiments confirmed that Oleum Miliacei has the anti-inflammatory action and stimulates the processes of regeneration. Its higher healing effects as compared with Oleum Hippophae and Oleum Rosae was shown. It precipitated ulcer healing as compared with the latter preparations.
Thorsten Kluener - One of the best experts on this subject based on the ideXlab platform.
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oxidizing elemental platinum with Oleum under harsh conditions the unique tris disulfato platinate iv pt s2o7 3 2 anion
ChemInform, 2014Co-Authors: Joern Bruns, Thorsten Kluener, Mathias S. WicklederAbstract:Direct oxidation of elemental Pt by Oleum (65% SO3) in the presence of BaCO3 yields yellow single crystals of Ba[Pt(S2O7)3] (H2SO4)0.5 (H2S2O7)0.5 (sealed glass ampoule, 160 °C).
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Oxidizing Elemental Platinum with Oleum under Harsh Conditions: The Unique Tris(disulfato)platinate(IV) [Pt(S2O7)3]2‐ Anion.
ChemInform, 2014Co-Authors: Joern Bruns, Thorsten Kluener, Mathias S. WicklederAbstract:Direct oxidation of elemental Pt by Oleum (65% SO3) in the presence of BaCO3 yields yellow single crystals of Ba[Pt(S2O7)3] (H2SO4)0.5 (H2S2O7)0.5 (sealed glass ampoule, 160 °C).
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reaction with Oleum under harsh conditions characterization of the unique m s2o7 3 2 ions m si ge sn in a2 m s2o7 3 a nh4 ag
ChemInform, 2013Co-Authors: Christian Logemann, Daniel Gunzelmann, Thorsten Kluener, Juergen Senker, Mathias S. WicklederAbstract:The title compounds are synthesized by reactions of MCl4 (M: Si, Ge, Sn) and A2SO4 (A: NH4, Ag) with Oleum (65% SO3; sealed glass tube, 250 °C, 24 h).
