Inert gas desorption relies on media such as nitrogen and carbon dioxide to create an oxygen-free environment. By heating or reducing pressure, the partial pressure of solvents on the activated carbon surface is lowered, facilitating the desorption of flammable and easily oxidized solvents like methanol and toluene. Its core advantage lies in fundamentally severing the oxygen component of the “fire triangle,” reducing the system’s oxygen concentration below 5%-10% and completely avoiding the combustion and explosion risks associated with high-concentration solvent vapors. Combined with carrier gas circulation and condensation recovery systems, this process ensures both high-purity solvent recovery and toxic gas leakage control through an enclosed system, achieving dual safeguards of safety and efficiency in explosion-proof scenarios such as pharmaceutical and fine chemical production.
- Flammable solvents: methanol, ethanol (high concentration), ether, dichloromethane, etc., widely used in the fields of pharmaceuticals and fine chemicals.
- Easily oxidizable solvents: cyclohexanone, tetrahydrofuran, acetic anhydride, etc. These substances are prone to deterioration in aerobic environments and require inert gas protection for recovery.
- High purity solvents required: isopropanol (electronic grade), n-hexane (chromatographic grade), etc., commonly used in electronic component cleaning and laboratory reagent recovery scenarios.
