The Establishment And The Applications Of The Equations For The Correction Of The Density Data Of Ionic Liquids

Ionic liquid is a new type of solvent,which has attracted extensive attention at home and abroad because of its wide liquid temperature range and low volatility.Density is one of the basic thermodynamic properties of matter,and it has a wide range of applications in chemical reactor design and pipeline design.This paper will correct the influence of impurity water and impurity chloride ion on the density data of typical ionic liquids reported in the literature,obtain the density data of"pure"ionic liquids and its temperature-dependent equations,and reveal the structure of cation and anion of ionic liquids.The influence of its density data provides reliable basic physical properties data for the research and application of ionic liquids.The content of this paper is divided into the following three parts:Firstly,the equation for correcting the influence of impurity water and impurity chloride ion on the density data of ionic liquid was established,and then the system was used to correct the influence of impurity water and impurity chloride ion on the density data of typical ionic liquid reported in more than 50 literature."Ionic density data.Secondly,according to the density data of the"pure"ionic liquid obtained by the correction,combined with the experimental error of the measured density data,a comprehensive analysis is given to give the recommended values of the density data of different ionic liquids at different temperatures.Make a graph of temperature change equation and compare the change of density data before and after correction and the fitting effect.Finally,using the recommended values of the density,the analysis revealed the influence of the structure of the anions and cations of the ionic liquid on the density data of the ionic liquid.The density data of the"pure"ionic liquid obtained in this paper and the equation of the density change with temperature provide important basic physical properties data for the industrial application and scientific research of ionic liquid.