Ternary eutectic solvent, and preparation method and application thereof

Abstract

The invention provides a ternary eutectic solvent, and a preparation method and application thereof. The ternary eutectic solvent is composed of a component A, a component B and a component C according to a certain molar ratio; the component A is one of alkyl imidazole hydrochloride, pyridine hydrochloride and trialkylamine hydrochloride; the component B is one of cuprous chloride and cobalt chloride; and the component C is zinc chloride. The ternary eutectic solvent can be used for absorbing 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...

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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

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