Method for trapping toluene by using eutectic solvent

Abstract

The present invention provides a method for trapping toluene by using a deep eutectic solvent, the method comprises the following steps: absorbing toluene by using a deep eutectic solvent, the deep eutectic solvent comprises a substance A and a substance B, the substance A comprises any one of tetraethylammonium chloride, allyltrimethylammonium chloride, choline chloride or triethylbenzyl ammonium chloride, the substance B comprises any one of phenol, ethylene glycol or levulinic acid, and the molar ratio of the substance A to the substance B is 1: 1-1: 4. According to the method, methylbenzene is effectively recycled, safety is guaranteed, and the environmental protection problem of methylbenzene tail gas treatment is effectively solved.

Description

technical field [0001] The invention relates to a toluene tail gas recovery process, in particular to a method for capturing toluene by using a deep eutectic solvent. Background technique [0002] As a common volatile organic compound (VOCs), toluene will not only cause harm to humans, but also damage the environment during use, causing serious environmental pollution problems. Therefore, it is necessary to find a suitable method to reduce the emission of toluene, so as to reduce the loss caused by its emission. [0003] Among the existing toluene treatment technologies, there are adsorption method, catalytic oxidation method, biological treatment method, plasma technology treatment method and absorption method. Among them, the absorption method is a traditional and mature treatment process, which uses the solubility of toluene in certain solvents to absorb and purify toluene-containing tail gas by using oily solvents with high boiling point and low vapor pressure. The abs...

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The method not only effectively recovers toluene, ensures safety, but also effec

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