Introduction to Oxybismethane
Dimethyl ethre (DME) is an organic compound with a chemical formula of C2H6O. It is a homologue of methyl ethre and has the characteristics of being colorless, flammable and gaseous. Due to its excellent physical and chemical properties, Oxybismethane has a wide range of application prospects in modern industry. This article will discuss in detail the uses, properties and production methods of Methoxymethane.
Specification Parameters (Technical Data Table)
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Property
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Specification
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Product Name
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DME
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Key Words
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Methoxymethane
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Chemical Formula
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C2H6O,CH3OCH3
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Appearance
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Colorless gas or compressed liquid at room temperature, with a chloroform-like odor
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Density
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Liquid phase: 661 kg/m³; Gas phase: 1.617 kg/m³ (at 20°C, air = 1)
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Purity
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≥99.99%
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Melting Point
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-141.5°C
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Boiling Point
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-24.9°C
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Flash Point (Closed Cup)
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-41°C
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Surface Tension
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16 dyne/cm (-10°C)
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Gas Viscosity
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82.5 μP (0°C)
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Heat of Vaporization
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111.64 cal/g (-24.8°C)
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Heat of Combustion
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7545 cal/g
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Specific Heat
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0.5351 cal/g·°C
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Critical Pressure
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5.37 MPa
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Critical Temperature
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126.9°C
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Heat Value of Liquid DME
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6903 * 4.1868 J/kg
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Heat Value of Gaseous DME
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14200 * 4.1868 J/kg
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Packaging
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50kg/100kg cylinders or ISO tanks
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Physical and chemical properties of Methoxymethane
Methoxymethane is a colorless gas with a slight ethre aroma at room temperature and pressure. Its boiling point is -24.9℃, melting point is -141.5℃, and density is 1.59 kg/m³. Methoxymethane has a polar molecular structure and low solubility, but it is miscible with most organic solvents. Its chemical properties are relatively stable and it is not easy to react with acids and alkalis, but it can undergo combustion and oxidation reactions at high temperatures or in the presence of catalysts to produce carbon dioxide and water.
Uses of Methoxymethane
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Chemical Raw Material: DME is primarily used as a methylating agent for the production of dimethyl sulfate. Additionally, it can synthesize N,N-dimethylaniline, methyl acetate, acetic anhydride, ethylene DME, and ethylene among other chemical raw materials.
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Industrial Uses: DME serves as an alkylating agent, refrigerant, foaming agent, solvent, extractant, and leaching agent. Furthermore, it can be used as a substitute for anesthetics, composite ethanol for civilian use, and Freon aerosols.
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Aerosol Propellant: In industries such as hair care, skin care, pharmaceuticals, and coatings, DME can be used as a propellant for various aerosols.
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Fuel Additive: DME is promoted as a fuel additive abroad and has many unique applications in the pharmaceutical, dye, and pesticide industries. Due to the shortage of petroleum resources, the abundance of coal resources, and increasing environmental awareness, DME produced from coal conversion into clean fuels is increasingly valued. As an alternative fuel to LPG and petroleum products, DME does not produce environmentally damaging gases when burned and can be produced cheaply and in large quantities.
Production method of DME
Methanol dehydration method
Methanol dehydration method is one of the main methods for producing DME. This method uses methanol to undergo a dehydration reaction under the action of a catalyst (such as γ-alumina, ion exchange resin, etc.) to produce DME. The reaction equation is: 2CH3OH → CH3OCH3 + H2O. This method has a simple process and low cost, and is currently the mainstream technology for industrial production of dDME.
Synthesis gas production method
The synthesis gas production method uses synthesis gas (a mixture of CO and H2) as a raw material to prepare DME through a one-step or two-step method. The one-step method refers to the direct generation of DME from synthesis gas under the action of a catalyst, and the reaction equation is: 2CO + 4H2 → CH3OCH3 + H2O. The two-stage method refers to first converting synthesis gas into methanol, and then dehydrating methanol to produce DME. This method has the advantages of a wide range of raw material sources and high production efficiency.
Market prospects of DME
With the growth of global energy demand and the improvement of environmental protection awareness, DME, as a clean energy and important chemical raw material, has shown a rapid growth trend in market demand. Especially in China, the Methoxymethane industry has received strong support from the government and has huge market potential in the future. With the continuous improvement of production technology and the continuous expansion of application fields, the economic and social benefits of Methoxymethane will be further improved.
Conclusion
Due to its unique physical and chemical properties, Oxybismethane has a wide range of applications in fuel, refrigerant, foaming agent and chemical raw materials. Methanol dehydration method and synthesis gas preparation method are the main production methods, and Oxybismethane has broad market prospects. In the future, with the continuous advancement of technology and the continuous expansion of application scope, Oxybismethane is expected to play a more important role in modern industry and promote the sustainable development of economy and environment.
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