Method and equipment for purifying ethanolamine and diethylene glycol monobutyl ether in electronic waste solution

Abstract

The invention discloses a method and equipment for purifying ethanolamine and diethylene glycol monobutyl ether in an electronic waste solution, and the method and equipment have the beneficial effects that impurities in waste diethylene glycol monobutyl ether and ethanolamine stripping liquid are removed by liquid separation, gas stripping method separation, decompressed distillation deionization tower deionization and decompressed distillation; the electronic-grade organic solvent diethylene glycol monobutyl ether and the electronic-grade organic solvent ethanolamine are obtained. According to the purification method for the high-purity organic solvents diethylene glycol monobutyl ether and ethanolamine, through a series of low-energy-consumption procedures of liquid separation, gas stripping desorption, reduced pressure distillation, desorption tower desorption and reduced pressure rectification, the pollution degree of waste solvents to the environment in photovoltaic industry production is reduced, and the production cost is saved.

Description

technical field [0001] The invention relates to the technical field of solvent separation and purification, in particular to a method and equipment for purifying electronic waste solution ethanolamine and diethylene glycol monobutyl ether. Background technique [0002] With the rapid development of domestic electronics manufacturing industry and optoelectronic industry, the usage of electronic chemicals such as photoresist stripper also increases greatly, and the composition of diethylene glycol monobutyl ether (BDG) and ethanolamine (MEA) is used as stripper Liquid is widely used in removing photoresist by swelling and dissolving, and the solution formed by diethylene glycol monobutyl ether, ethanolamine, polymer resin and photosensitizer obtained in production. The solution is a mixed waste solvent of diethylene glycol monobutyl ether and ethanolamine, which has poor environmental protection, a large environmental load, and high post-production costs. In recent years, alth...

AI Technical Summary

Problems solved by technology

The traditional process usually uses direct distillation to remove impurities and separate and recover organic solvents. However, the product recovery rate of direct distillation process is not high, and the quality of recovered products cannot reach the level of photoelectric recycling. In view of this, in-depth research on the above problems, This case arose

Images