Methoxymethane (DME) is an organic compound with the chemical formula C₂H₆O. This colorless, flammable gaseous compound serves as a homologue of methyl and possesses excellent physicochemical properties that make it valuable for numerous industrial applications.

Methoxymethane appears as a colorless gas with a slight aroma at standard conditions. Key properties include:

• Boiling point: -24.9°C
• Melting point: -141.5°C
• Density: 1.59 kg/m³
• Polar molecular structure with low solubility
• Miscible with most organic solvents
• Chemically stable (resistant to acids and alkalis)
• Combustible at high temperatures, producing CO₂ and H₂O

Methoxymethane serves as an efficient, clean-burning fuel alternative with:

• High energy density comparable to diesel
• Reduced emissions of particulate matter, NO_x, and SO_x
• Compatibility with diesel engines and LPG equipment

Its low boiling point (-24.9°C) makes it ideal for:

• Refrigeration systems (refrigerators, air conditioners)
• Polymer foam production (uniform cellular structure)

As a versatile intermediate, DME facilitates production of:

• Formaldehyde, acetaldehyde, and acetic acid
• Dimethyl carbonate (DMC)
• Dimethylethanolamine (DMAE)

The predominant industrial method using the reaction:

Advantages include simple process flow and low production costs. Typical catalysts include γ-alumina and ion exchange resins.

Two process variations:

Growing demand is driven by:

• Global clean energy initiatives
• Environmental regulations favoring low-emission fuels
• Expanding chemical applications
• Government support in key markets like China