| abstract |
The invention discloses a purification method of dimethoxymethane. A potassium salt mixed polyol is adopted as an extraction agent to extract dimethoxymethane to be refined. The potassium salt mixed polyol is a mixture of a potassium salt, ethylene glycol and glycerol, with the ethylene glycol and glycerol being in a mass ratio of 1-1.5:1. The potassium salt is potassium acetate or potassium chloride, and accounts for 1-5% of the mass of the extraction agent. Preferably, the potassium salt is potassium acetate. The invention has the characteristics of stable and simple process, low energy consumption, high resource recycling rate, and strong repeatability. The raw material required dimethoxymethane concentration range is wide, industrialization is feasible, and the production process has no discharge of "three wastes". |