79917-90-1Relevant articles and documents
Experimental measurement and modeling of vapor-liquid equilibrium for the ternary system water + ethanol + 1-Butyl-3-methylimidazolium chloride
Geng, Wei,Zhang, Lianzhong,Deng, Dongshun,Ge, Yun,Ji, Jianbing
, p. 1679 - 1683 (2010)
Vapor-liquid equilibrium (VLE) data were measured for the ternary system water (1) + ethanol (2) + 1-butyl-3-methylimidazolium chloride ([bmim]Cl) (3). Complete T, x, and y data were obtained in a relatively wide range of ionic liquid (IL) mass fractions up to 0.8 and in a relatively complete composition range for the volatile binary pair. The nonrandom two-liquid (NRTL) equation was used for correlation and was revealed to be adequate for the ternary system in the experimental composition range. The ternary VLE behavior was also modeled by the correlation of two data sets, in which the ethanol mole fraction on IL-free basis is respectively at 0.1 and 0.98. In this way, the six data sets were reproduced satisfactorily, with root-mean-square deviations of 0.40 K for temperature and 0.0070 for vapor-phase mole fractions. Owing to the regular distribution of the experimental data, a good agreement between the experiment and the calculation was graphically presented. The effect of the IL on the VLE behavior of the volatile components was also illustrated.
Method for synthesizing antioxygen 1076
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Paragraph 0020; 0021, (2017/07/21)
The invention belongs to the technical field of fine chemistry and particularly relates to a method for synthesizing antioxygen 1076. The method is prepared by carrying out an ester exchange reaction on raw materials including beta-(3,5-ditert-butyl-4-hydroxyphenyl)methyl propionate and octadecanol; the ester exchange reaction is carried out in a neutral/weakly alkaline ionic liquid catalysis system. According to the method provided by the invention, neutral/weakly alkaline ionic liquid is used as a catalyst and the catalysis performance is good; the content of final products reaches 99% or more and the yield reaches 97.5% or more. In a 1076 esterification reaction, performances of the neutral/weakly alkaline ionic liquid catalyst are better than catalysts including sodium methylate, potassium tert-butanolate, organic tin, organic titanium and the like. By utilizing the ionic liquid catalysis system, post-treatment operation is simple; the catalyst is environmentally friendly and the catalyst can be circularly utilized; and the product has a good color and high yield.
Recyclable zinc (II) ionic liquid catalyzed synthesis of azides by direct azidation of alcohols using trimethylsilylazide at room temperature
Singh, Ashima,Singh, Harjinder,Khurana
, p. 2498 - 2502 (2017/05/31)
A new efficient method has been reported for the synthesis of azides by direct azidation of alcohols with TMSN3 in presence of recyclable task specific ionic liquid (TSIL) [bmim]ZnCl3 as a catalyst in DCM at room temperature. Ionic liquid [bmim]ZnCl3 was synthesized under solvent free conditions and characterized by IR, 1H NMR, 13C NMR and HRMS. The Lewis acidity of catalyst was also examined using IR spectroscopy. The main features of this new methodology are high yields of products, recyclability of catalyst, scalability of reaction to gram scale and short reaction time.