Glycol dimethyl ether is also known as 1, 2-dimethoxy-ethane, dimethyl fiber soluble agent, α, β-dimethoxy-ethane, Glyme, referred to as GDME. Colorless liquid. Smells of ether. Ethylene glycol dimethyl ether is an aprotic polar solvent with excellent properties. It is widely used in the chemical industry and the synthesis of pharmaceutical extractants and organic intermediates. Glycol dimethyl ether produced by traditional Williamson synthesis is prepared under the action of sodium ethanol-phase transfer catalyst. Due to the long reaction path and many by-products, the process is difficult to separate products. In order to obtain pure products, the waste lye needs to be neutralized by acid. The whole process will produce a large amount of industrial salt and wastewater, resulting in serious environmental pollution, and the use of liquid acid and base requires high corrosion resistance of equipment. With the need of product upgrading and the improvement of people's awareness of environmental protection, the adoption of environment-friendly Chemicalbook solid acid catalyst process has become an urgent need. Chemical properties Colorless liquid. Melting point -58ºC (-71ºC), boiling point 84ºC, relative density 0.8665 (20/4ºC), refractive index 1.3796, flash point 0ºC. It can be miscible with water and alcohol and soluble in hydrocarbon solvents. Has a strong ether-like odor. It is mainly used as solvent and organic synthesis intermediate. It is mainly used in polymer chemistry, electrochemistry, boron chemical process field, and also used as solvent of resin, nitrocellulose and so on, as well as pharmaceutical extraction agent and organic synthesis intermediate. The production method is the reaction of ethylene glycol monomethyl ether with sodium metal and chloromethane. The ethylene glycol monomethyl ether was reflux with sodium metal until the sodium metal completely reacted, and the temperature was lowered to 45 ° C and the chloromethane was injected. After the reaction, fractionation is carried out, and the fraction of 84-85.5ºC is collected to obtain the finished product. category
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