PRODUCTS

POLYETHYLENE GLYCOL DIMETHYL ETHER

Polyethylene glycol dimethyl ether appears as a liquid with a sharp odor. Less dense than water. Flash point 34°F. Mildly toxic by ingestion and inhalation. Vapors heavier than air. Used to make other chemicals.

CAS Number: 24991-55-7
EC / List no.: 607-475-9

SYNONYMS:

Polyglyme; [www.actio.net] Carpol CLE 1000; Dimethoxy polyethylene glycol; Genosorb 175; Genosorb 300; Glyme-23; Nissan Unisafe MM 1000; Nissan Unisafe MM 400; PEG-DME 2000; Polyoxyethylene dimethyl ether; Sanfine DM 1000; Sanfine DM 200; Sanfine DM 400; Selexol; U-Nox DM 1000; U-Nox DM 200; Varonic DM 55; alpha,omega-Methoxypoly(ethylene oxide); alpha-Methyl-omega-methoxypoly(oxy-1,2-ethanediyl); Glycols, polyethylene, dimethyl ether; Poly(oxy-1,2-ethanediyl), alpha-methyl-omega-methoxy-; [ChemIDplus] CLE 400; PEGDME; [RTECS] SELEXOL SOLVENT; [Univar MSDS]
POLY(ETHYLENE GLYCOL) (N) DIMETHYL ETHER;POLYETHYLENE GLYCOL 500 DIMETHYL ETHER;POLY(ETHYLENE GLYCOL) DIMETHYL ETHER;POLYETHYLENE GLYCOL DIMETHYL ETHER 2000;POLYETHYLENE GLYCOL DIMETHYL ETHER 250;POLYETHYLENE GLYCOL DIMETHYL ETHER 500;POLYETHYLENE GLYCOL
Glycols,polyethylene, dimethyl ether (8CI);Adeka Carpol CLE 400;CLE 400;Carpol CLE 400;Dimethoxy polyethylene glycol;Genosorb 175;Glyme 23;Hisolve MPM;NHD (solvent);Nissan Uniox MM 1000;Nissan Uniox MM 500;Nissan UnioxMM 800;Nissan Unisafe MM 1000;PEG-DME;PolyDME 250;Polyethylene glycol dimethylether;Polyglycol DME 250;Polyglycol DME 500;Polyoxyethylene dimethyl ether;Sanfine DM 200;Sanfine DM 400;U-Nox DM 1000;U-NoxDM 200;Uniox MM 2000;Uniox MM 500;Uniox MM 800;Varonic DM55;a,w-Methoxypoly(ethylene oxide);a-Methyl-w-methoxypolyoxyethylene;

Specifications
Appearance Colorless to Almost colorless clear liquid
Average molecular weight 230 to 250

Properties (reference)
Flash point 156 °C
Specific Gravity (20/20) 1.02
Refractive Index 1.43

Poly(ethylene glycol) dimethyl ether (PEGDME) polymers are widely used as drug solid dispersion reagents. They can cause the amorphization of drugs and improve their solubility, stability, and bioavailability. However, the mechanism about why amorphous Polyethylene glycol dimethyl ether polymer is highly stable is unclear so far. Molecular dynamics (MD) simulation is a unique key technique to solve it. The melting and glass-transition temperatures of the polymers are in good agreement with experimental values.

Melting point:52-55 °C
Boiling point:>250 °C
Density 1.08 g/mL at 25 °C
vapor pressure <1 Pa (20 °C)
refractive index n20/D 1.46
Flash point:>230 °F
storage temp. Store below +30°C.
form solid
explosive limit0.5%(V)

Category
Polyoxyethylenes
Description
Transparent yellow liquid with a mild odor; [Univar MSDS]
Sources/Uses
Used in gas treatment; [Univar MSDS]

Used as metal complexing agent and as a phase-transfer agent.

Polyethylene glycol dimethyl ether uses and applications include: Solvent; brake fluid component; solvent for removing CO, CO2, SO2, H2S and other sour-gas components from ammonia gas streams, for absorp. of fluorocarbons and other halogenated liquidsgases; stack gas scrubbing; solubilizer for plastics, textiles, and paper.

Polyethylene Glycol Dimethyl Ether the composite adsorbent is light yellow liquid, has the advantages of good chemical stability, no corrosion, no toxicity, low specific heat, low vapor pressure, low viscosity, low regeneration heat consumption and the like, Polyethylene Glycol Dimethyl Ether is used as an absorbent .,

Polyethylene Glycol Dimethyl Ether has been attracting increasing interest due to its benign characteristics involving lower cost, non-volatilization, and non-toxicity, etc.To continue our interest in developing environmental benign synthetic reactions.Herein we report a simple and practical oxidative scission of a wide range of monosubstituted, gem- and 1,2-disubstituted, trisubstituted, and tetrasubstituted aromatic olefins to the corresponding aldehydes and ketones by OOur studies were started with gem-diphenylethylene (1a) as a model substrate (Table 1).
When the oxidation scission of 1a was performed in N,N-dimethylformamide (DMF), methyl tert-butyl ether (MTBE), tetrahydrofuran (THF), 2-methyltetrahydrofuran (2-MeTHF) at 130 °C or under reflux condition with O2 as the sole oxidant, only trace amount of diphenylmethanone (2a) was observed (entries 1–4). To our delight, the desired product 2a was detected by HPLC with 73% yield in 1,4-dioxane at 100 °C for 10 hours (entry 5).
However, when 1,4-dioxane was replaced by morpholine, the yield decreased to 49% (entry 6).
To improve the reaction efficiency, ethylene glycol (EG), triethylene glycol (TEG), and a series of ethers including ethylene glycol dimethyl ether (EGDME), ethylene glycol diethyl ether (EGDEE), diethylene glycol monomethyl ether (DEGMME), diethylene glycol dimethyl ether (DEGDME), dipropylene glycol monomethyl ether (DPGMME), and dipropylene glycol dimethyl ether (DPGDME) were screened as a solvent at 130 °C for 10 hours, providing 54–94% yields (entries 7–14).
Moreover, it was found that the environmentally friendly poly(ethylene glycol) (PEG) and Polyethylene Glycol Dimethyl Ether (PEGDME) gave 96% and 99% yield, respectively (entries 15–16).

Polyethylene Glycol Dimethyl Ether is still a kind of fine chemical that can be used for light textile printing and dyeing, daily-use chemical industry, organic synthesis, printing ink paint etc.
Polyethylene Glycol Dimethyl Ether relates to a method for producing an acyclic or carbocyclic compound organic physical solvent Polyethylene Glycol Dimethyl Ether.
Polyethylene Glycol Dimethyl Ether CH3-（OCH2CH2）X-OCH3;The composite adsorbent is light yellow liquid, has the advantages of good chemical stability, no corrosion, no toxicity, low specific heat, low vapor pressure, low viscosity, low regeneration heat consumption and the like, Polyethylene Glycol Dimethyl Ether is used as an absorbent in the gas purification of synthesis ammonia and hydrogen production raw gas, city gas and natural gas, and has obvious effect of removing sulfide and carbon dioxide in the gas.
Currently, there are two production methods for Selexol,the U.S. Pat. No. 4, 3737392 discloses a sodium alkoxide process, i.e. ethylene oxide withMethanol reacts to generate Polyethylene Glycol Monomethyl Ether, then metal sodium reacts with the Polyethylene Glycol Monomethyl Ether to generate polyethylene glycol methyl ether sodium, and methyl chloride is used for methyl esterification to generate Polyethylene Glycol Dimethyl Ether, which is shown as the following formula.G.B 1500020 discloses another hydrolysis method for polyethylene glycol monomethyl ether acetal: that is, the polyethylene glycol monomethyl ether prepared by the above method firstly reacts with formaldehyde to generate an acetal intermediate, and the intermediate and hydrogen are heated and decomposed in the presence of a special catalyst to generate Polyethylene Glycol Dimethyl Ether and polyethylene glycol monomethyl ether, which are shown in the following formula.

The two production methods for preparing the Polyethylene Glycol Dimethyl Ether have the following defects,
(1) a, B the two processes require more ethylene oxide and the A process requires expensive metallic sodium, and the raw material cost is high.
(2) The method A uses metallic sodium in the reaction process, and the method B uses hydrogen in the reaction process, and the metallic sodium and the hydrogen are not safe enough.
(3) A, B the two methods have high technological requirements, high temperature, high energy consumption, high pressure, high requirements on equipment and materials, and long reaction time. A. Process conditions of the two methods B. Polyethylene Glycol Dimethyl Ether aims to overcome the defects of the technology and provide a production method for preparing Polyethylene Glycol Dimethyl Ether by a one-step method, which has the advantages of easily available raw materials, low cost, simple and safe process, low reaction temperature, low pressure and short reaction time.

The present Polyethylene Glycol Dimethyl Ether is achieved by the following method.
The method is characterized in that polyethylene glycol, sodium hydroxide and an organic reaction medium are added into a reaction kettle in a molar ratio of 1: 2-5: 0.5-8, methyl halide or dimethyl sulfate is added to keep the mixture at 0.01-0.6 MPa or at 30-90 ℃ to fully react, and Polyethylene Glycol Dimethyl Ether is obtained by separationCH3-（OCH2CH2）x-OCH3. Wherein, X is 2-9 average molecular weight M150-300, the organic reaction medium can be benzene, toluene, xylene or , and the halomethane can be chloromethane, bromomethane or iodomethane.
Polyethylene Glycol Dimethyl Ethers with different molecular weights can be obtained by adopting polyethylene glycols with different molecular weights. The reaction is shown in the following formula, 2NaOH, 2-methyl halide or dimethyl sulfate, organic reaction medium.
The method for producing the Polyethylene Glycol Dimethyl Ether has the advantages of simple and safe process, easily obtained raw materials, low reaction temperature and reaction pressure, short reaction time and energy conservation, can be flexibly produced according to different requirements of users on the molecular weight of products, and the produced Polyethylene Glycol Dimethyl Ether is different from the raw materials and the preparation method of foreign Selexol, has similar effects, is a fine chemical product, and can be used for light textile printing and dyeing, daily chemical industry, organic synthesis, ink coating and the like. FIG. 1 is a flow chart of the production method of the Polyethylene Glycol Dimethyl Ether of the invention.

Application

1.Polyethylene glycol dimethyl ether is mainly used for the removal of carbon dioxide and sulfur dichloride in fertilizer plants.

2.NHD solvent is a new type of highly efficient desulfurization and decarbonization solvent. The product has high purity and good chemical and thermal stability for high acidity, Alkalinity Medium and high temperature. It is suitable for the purification of syngas from coal. Polyethylene glycol dimethyl ether can effectively remove mixed acid gases such as natural gas, oil field gas, refinery gas and city gas, and hydrogen sulfide gas in liquefied gas. Especially effective removal of organic sulfur.

1-Can be an assistant solvent in main acid gas (H2S, Co2, CO.S), helping to gassing, shaping, cling, and be antistatic.
2-Can be assistant solvent in textile-dyeing trades and of special printing ink, offset point developer, printing material and printing facilities' cleanser, industrial cleanser(the mainly preparation of halogen free detergent)
3-Daily cleanser, organic reaction, devolving activator, paint, de-paint and defoamer in printing trades, and more

Polyethylene glycol dimethyl ether appears as a liquid with a sharp odor. Less dense than water. Flash point 34°F. Mildly toxic by ingestion and inhalation. Severely irritates skin and eyes. Vapors heavier than air. Used to make other

1, Typical applications
Use as solvent.
Use as cleansing agent.
Use as emulsifying agent, dispersing agent.
Use as solubilizing agent

Physicochemical Information
Boiling point   241 °C
Density   1.03 g/cm3 (20 °C)
Explosion limit   0.5 %(V)
Flash point   135 °C
Ignition temperature   210 °C DIN 51794
Melting Point   -23 °C
Vapor pressure   <1 Pa (20 °C)
Viscosity kinematic   7.8 mm2/s (20 °C)

Specifications
Appearance Colorless to Almost colorless clear liquid
Average molecular weight 230 to 250

Raw Materials
Ethylene Oxide
Methyl alcohol
Methyl alcohol
Dimethyl sulfate
Dimethyl sulfate
Sodium hydroxide
Chloromethane

Polyethylene glycol dimethyl ether has stable chemical properties, good thermal stability, low volatilization loss, high boiling point, low freezing point, low vapor pressure and many other advantages. It is an excellent organic solvent and has excellent CO2 and H2S The function of selective absorption and removal is suitable for the purification of coal-to-syngas and the removal of acid gases from natural gas, oil field gas, refinery gas and city gas. In recent years, it has been widely used in gas purification processes.

Product Usage
Polyethylene glycol dimethyl ether is a new type of high-efficiency desulfurization and decarbonization solvent with high product purity and good chemical stability and thermal stability to high acidity, alkalinity media and high temperature. It is suitable for the purification of coal synthesis gas. It can effectively remove mixed acid gases such as natural gas, oil field gas, refinery gas and city gas, and hydrogen sulfide gas in liquefied gas. Take off H2s co2.

Polyethylene glycol dimethyl ether CH3-（OCH2CH2）X-OCH3The composite adsorbent is light yellow liquid, has the advantages of good chemical stability, no corrosion, no toxicity, low specific heat, low vapor pressure, low viscosity, low regeneration heat consumption and the like, is used as an absorbent in the gas purification of synthesis ammonia and hydrogen production raw gas, city gas and natural gas, and has obvious effect of removing sulfide and carbon dioxide in the gas.

Description
Transparent yellow liquid with a mild odor;
Sources/Uses
Used in gas treatment;

Polyethylene glycol dimethyl ether solvent is a new type of high-efficiency desulfurization and decarbonization solvent. The product has high purity and good chemical stability and thermal stability to high acidity, alkalinity media and high temperature. It is suitable for the purification of coal-made chemicalbook gas. It can effectively remove mixed acid gases such as natural gas, oil field gas, refinery gas and city gas, and hydrogen sulfide gas in liquefied gas. In particular, it can effectively remove organic sulfur.