Three-ingredient eutectic ionic liquid and preparation method thereof

Abstract

The invention relates to three-ingredient eutectic ionic liquid and a preparation method thereof. The three-ingredient eutectic ionic liquid consists of ILC, REC and HBD, wherein ILC is ionic liquid with chloride ions which serve as negative ions, REC is a chloridized rare-earth metal salt, and HBD is a compound with multiple hydrogen bonds. The preparation method comprises the following steps of: uniformly mixing ILC, REC and HBD according to the molar ratio of 1 to 1 to n (n= 0.5-4), heating up to the temperature of 100-140 DEG C, and then, carrying out heat preservation for 2-4 hours until a mixture is completely dissolved. According to the ionic liquid disclosed by the invention, the melting point is extremely low, the viscosity is low, the conductivity is high, the dissolution performance is good, and the rare-earth metal salt has Lewis acidity and catalysis performance, so that the ionic liquid can be widely applied to organic synthesis reaction, the preparation of nano and mesoporous materials, gas absorption and the like; and the preparation process is simple, the raw materials are readily available, the cost is low, no organic solvents are used and no toxic substances are emitted during reaction, no byproducts are produced, and the ionic liquid is biodegradable, so that the ionic liquid is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of ionic liquid and its preparation, in particular to a three-component eutectic ionic liquid and its preparation method. Background technique [0002] Rare earth elements have a special electronic structure, the 4f electrons in the inner layer are shielded by the 5s and 5p electrons in the outer layer, and are localized in the atom. The outermost electron configurations 4f and 5d, which determine the properties of elements, form the conduction band. The localization and incomplete filling of 4f electrons give rare earths unique optical and magnetic properties. These properties make rare earths widely used in the field of catalysis. Especially in the application of catalytic organic synthesis, such as carboxylate synthesis, fatty alcohol amination, synthetic rubber, catalytic combustion, automotive catalysts, etc. my country is rich in rare earth resources. Rare earth chloride is a simple, cheap and easy-to-obtain Le...

AI Technical Summary

Problems solved by technology

However, since rare earth chlorides are generally inorganic solids and have poor solubility in organic solvents, they can only be catalyzed in heterogeneous phases, so the catalytic efficiency and yield are low.