A kind of ternary deep eutectic solvent and its preparation method and application

Abstract

The invention provides a ternary deep eutectic solvent and its preparation method and application. The ternary deep eutectic solvent is composed of component A, component B and component C according to a certain molar ratio, wherein component A is alkylimidazole hydrochloride, pyridine hydrochloride, trialkylamine hydrochloride One of them, component B is one of cuprous chloride and cobalt chloride, and component C is zinc chloride. The ternary deep eutectic solvent can be used to absorb carbon monoxide at high temperature.

Description

technical field [0001] The invention belongs to the field of chemical absorption and separation, and in particular relates to a deep eutectic solvent, a preparation method thereof and an application for absorbing carbon monoxide at high temperature. Background technique [0002] Carbon monoxide is an important carbon-chemical basic raw material, used to manufacture acetic acid, acetic anhydride, oxalate, ethylene glycol, dimethylformamide, dimethyl carbonate, etc., and phosgene synthesis to further manufacture TDI, MDI, etc. important chemicals. Starting from the requirements of carbon-chemical industry, resource utilization and environmental protection, the development of efficient carbon monoxide capture and separation technology has important scientific development significance and industrial application value. [0003] At present, the methods for separating carbon monoxide include cryogenic rectification, cuproammonia solution method, COSORB method and pressure swing ad...

AI Technical Summary

Problems solved by technology

However, these methods all have their inherent defects, for example: cryogenic distillation method is difficult to separate carbon monoxide and nitrogen, cuproammonia solution method and COSORB method will produce volatile organic vapor and need to absorb carbon monoxide at low temperature, pressure swing adsorption The method has high energy consumption and cumbersome operation, and it is easy to be poisoned after adsorbing carbon dioxide, which leads to the deactivation of the adsorbent

In addition, the temperature of coke oven gas, converter gas, blast furnace gas, calcium carbide and yellow phosphorus tail gas discharged in the chemical process industry is usually very high, and it is difficult to capture and separate carbon monoxide under high temperature and harsh conditions with absorbents and adsorbents

Images