Polyethylene glycol dimethyl ether

Packing:50kg,200kg,250kg drum

Specification:  CAS NO.:24991-55-7

 Appearance: Pale yellow transparent liquid Assay： 99%min by GC IR Identity: conform to standard HNMR： conform to standard carbon spectrum: conform to standard Water by K. F.:0.5% max or as per the customer’s request Loss on drying:0.5% max. or as per the customer’s request

Used mainly in

Solvent for desulfurization and decarbonization: widely used in industrial gas purification such as fertilizer plants, natural gas, refinery gas, and city gas, it efficiently removes H ₂ S and CO ₂, especially suitable for the purification process of coal to synthesis gas.

Organic synthesis solvents and catalysts: Due to their low volatility, good solubility, and thermal stability, they can be used as media or catalysts for organic reactions.

Surfactant: Used as a low foaming surfactant and cleaning agents (such as beer bottles, bottles, and tableware cleaning).

Film forming agent/modifier: applied in the fields of coatings, inks, adhesives, electronic materials, metalworking fluids, etc

Synthesis lines:

the typical synthesis method of 24991-55-7 (polyethylene glycol dimethyl ether) is as follows:

1. Starting materials: Ethylene oxide (EO) and methanol are used as the basic raw materials.

2. Catalytic polymerization: In the presence of alkaline catalysts such as KOH or NaOH, methanol first undergoes ring opening addition reaction with ethylene oxide to generate monomethoxypolyethylene glycol (HO (CH ₂ CH ₂ O) ₙ CH ∝).

3. End group capping: By further reacting with ethylene oxide and controlling the degree of polymerization (usually with an average degree of polymerization n ≈2-5, corresponding to a molecular weight of about 250-500), and then undergoing methylation or acid catalyzed ring closure, double capped methoxy capped polyethylene glycol dimethyl ether (CH3 O (CH ₂ CH ₂ O) ₙ CH3) is obtained.

Purification: Purification is achieved through methods such as vacuum distillation or crystallization to obtain high-purity products (≥99%)）‌