- Preparation method of trifluoromethane sulfonic acid
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The invention relates to a preparation method of trifluoromethane sulfonic acid. According to the preparation method, trifluoromethanesulphonyl fluoride and alkali metal hydroxide are subjected to a neutralizing hydrolysis reaction under existence of a fluorine fixing agent, after the reaction is completed, reaction liquid is filtered and dried, and fluorinated methyl sulfonic acid alkali metal salt is obtained; the fluorinated methyl sulfonic acid alkali metal salt and fuming sulphuric acid are subjected to acidizing treatment, then rectification is conducted multiple times, and high-purity trifluoromethane sulfonic acid is obtained. Through improvement of the preparation method, operating flexibility, production efficiency and product stability are improved, the comprehensive yield is raised, product purity can reach 99.90% or above, and the preparation method is suitable for industrial production.
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Paragraph 0030
(2017/01/09)
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- Li(glycine)(CF3SO3) as an effective and recoverable catalyst for the preparation of 3,4-dihydropyrimidine-2-(1H)-one under solvent-free conditions
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An efficient solvent-free protocol for the synthesis of 3,4-dihydropyrimidine-2-(1H)-one by the one-pot condensation of aldehyde, ethyl acetoacetate and urea using Li(glycine)(CF3SO3) as a reusable acidic ionic liquid is reported. These reactions have the advantages in this work of clean reaction, simple purification, short reaction time and high yields.
- Abbaspour-Gilandeh, Esmayeel,Azimi, Seyyedeh Cobra,Mohammadi-Barkchai, Aidin
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p. 54854 - 54863
(2015/02/05)
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- Perfluoroalkylsulfone reactions with nucleophiles
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Perfluorodialkylsulfones were found to react readily with metal hydroxides in water or alcohol solution and with ammonia to form fluorinated sulfonic acid derivatives.
- Barrera, Michael D.,Cheburkov, Yuri,Lamanna, William M.
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- Zur Synthese neuartiger Triflate der 14. Gruppe
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Trifluoromethanesulfonates of silicon, germanium, tin and lead are obtained by cleavage of the corresponding phenyl derivatives with CF3SO3H.Selective cleavage of the tin-carbon bond is observed in the case of silyl- and germylstannanes.Reaction of bis(trifluoromethanesulfonates) with lithiumorganic compounds leads to functional substituted triflate derivatives.
- Uhlig, W.
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p. 377 - 383
(2007/10/02)
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- Studies on trifluoromethanesulfonic acid. Part 2. Conductivities of solutions of metal trifluoromethanesulfonates and other bases in trifluoromethanesulfonic acid
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Electrical conductivity measurements are reported for solutions in trifluoromethanesulfonic acid of a number of simple and complex bases, including univalent and divalent metal trifluoromethanesulfonates.The univalent metal salts, water, aniline, and acetic acid behave as fully dissociated bases, while the alkaline earth metal salts show considerable ion association.The trifluoromethanesulfonate anion appears to have an abnormally high mobility, as compared to the metal cations, and is believed to conduct by a proton-transfer mechanism.Dissociation constants for some weak organic bases and association constants for strontium and barium trifluoromethanesulfonates are estimated.Sulfuric acid behaves as a weak electrolyte, while sulfur trioxide is effectively a non-electrolyte.The conductivities of potassium nitrate and potassium dihydrogenphosphate are consistent with the formation of the nitryl cation and the phocphate acidium ion, respectively.
- Russell, David G.,Senior, John B.
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