Method for simultaneous preparation of low viscosity methoxyl magnesium ionic liquid and high-pressure hydrogen

Abstract

The invention discloses a method for simultaneous preparation of low viscosity methoxyl magnesium ionic liquid and high-pressure hydrogen. The steps are as below: (1) adding magnesium powder and methanol into a reactor; (2) opening the heating switch of a reactor, heating to rise the temperature, switching off the heating switch when the temperature rises to a certain degree, and reacting magnesium powder and methanol for 1-6 h; (3) cooling the reactor reaction, discharging the hydrogen gas generated in the reaction until atmospheric pressure is reached in the reactor, discharging the material, taking a liquid product, distilling to remove excess methanol to obtain the remaining melt which is methoxyl magnesium ionic liquid. The method of the present invention simultaneously prepares low viscosity methoxyl magnesium ionic liquid and high pressure hydrogen, has the advantages of simple preparation process, simple device and high reaction conversion rate; the low viscosity methoxyl magnesium ionic liquid has viscosity of 10-30m Pa.S and is conducive to the application in catalyst and extraction. The prepared hydrogen haspressure up to 1.0-60.0 MPa, and purity of greater than 99.99%.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction engineering, and in particular relates to a method for simultaneously preparing low-viscosity methoxymagnesium ionic liquid and high-pressure hydrogen. Background technique [0002] Ionic liquid (ionic liquid), also known as room temperature ionic liquid (room temperature ionic liquid), refers to an organic salt composed entirely of anions and cations at room temperature or near room temperature. Compared with traditional organic solvents and electrolyte solutions, ionic liquids have the following unique advantages: (1) unique properties such as non-volatility, non-flammability, conductivity, catalysis, separation, coordination, chirality, etc., are a special class of solvents and Functional materials; (2) High thermal stability, wide liquid temperature range, adjustable acidity and alkalinity, polarity, coordination ability, and solubility to organic matter, inorganic matter, polymers, ...

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Problems solved by technology

[0005] A device for preparing high-pressure hydrogen using metal hydrides (CN201310628587.6). This invention discloses a device for preparing high-pressure hydrogen using metal hydrides, which belongs to the static compression technology field of hydrogen. The device consists of a control component, a heating circuit, a cooling Circuit, reaction bed, etc., using Ti-Mn-based, Ti-Cr-based and other metal hydrides can pressurize 0.2MPa hydrogen to 20MPa, the pressurization ratio reaches 100, and the output gas purity reaches 99.999%, but the equipment is limited to Hydrogen compression, and the input cost of equipment is relatively high

Zhu Gang et al.'s "Methanol Cracking on MgO Supported Transition Metal Catalysts to Produce Hydrogen" research shows that methanol can be cracked under the catalyst to produce hydrogen-rich gas, but the reaction temperature is 600°C, which requires high equipment and consumes a lot of energy. , not conducive to industrial production