Process method for producing ethylene glycol mono-tert-butyl ether

Abstract

The invention discloses a process method for producing ethylene glycol mono-tert-butyl ether and belongs to the field of process production of chemical products. The production process comprises the following steps: taking common ethylene glycol mono-tert-butyl ether as a raw material, adding a certain proportion of a special entrainer, carrying out azeotropic distillation under certain conditions, and rectifying out impurities, namely ethylene glycol tert-dibutyl ether and water in the ethylene glycol mono-tert-butyl ether, so that the content of the product ethylene glycol mono-tert-butyl ether is greater than or equal to 99.9 percent, the content of the ethylene glycol tert-dibutyl ether is smaller than 500 ppm and the water content is smaller than 100 ppm; the process method can be used for the fields of pharmaceutical intermediates, high-end coatings, high-end electronic cleaning agents and the like. The process has the advantages of simplicity, low energy consumption, high purityof products, environment friendliness and the like; the entrainer is simple in separation and can be recycled; in addition, the process is an advanced production process of the ethylene glycol mono-tert-butyl ether with high quality.

Description

technical field [0001] The invention relates to the technical field of chemical product production technology, in particular to a process for producing high-quality ethylene glycol mono-tert-butyl ether Background technique [0002] As a product with low photochemical reactivity, ethylene glycol mono-tert-butyl ether (ETB) can be used as a substitute solvent for ethylene glycol butyl ether (EB) in some fields, and it is a new type of environmentally friendly solvent. Compared with EB, ETB has the advantages of good water solubility, good latex dispersion stability, good aqueous solution volatility, mild skin irritation, and low photochemical reactivity; it can be widely used in water-based paint solvents, paint solvents, ink dispersants, Household cleaning agents, fuel additives and other fields. High-quality ethylene glycol mono-tert-butyl ether can be used as a cleaning solution, stripping agent, industrial cleaning agent, and photoresist buffer in liquid crystal display ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of low content of ethylene glycol mono-tert-butyl ether prepared by steam azeotropic distillation, the present invention uses ordinary ethylene glycol mono-tert-butyl ether as raw material and adds a certain proportion of special entrainer. Carry out azeotropic distillation under certain conditions, rectify the impurity ethylene glycol di-tert-butyl ether and water in ethylene glycol mono-tert-butyl ether, and produce high-quality ethylene glycol mono-tert-butyl ether.

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