Method for preparing high-purity methanol and CO through decarbonylation of methyl formate

The invention relates to a method for preparing high-purity methanol and carbon monoxide by decarbonylation of methyl formate, which comprises the following steps: carrying out decomposition reaction on refined methyl formate under the action of a catalyst to generate carbon monoxide and methanol, carrying out gas-liquid separation, returning the carbon monoxide to a carbonylation system for preparing ethylene glycol or discharging a torch, the methanol returns to an esterification system for preparing ethylene glycol or is collected. The MF decarbonylation technology is utilized, namely MF is vaporized and preheated and then is subjected to decomposition reaction on a special catalyst to generate CO and ME, reaction gas is cooled and then subjected to gas-liquid separation, the gas is purified and then enters a carbonylation system, and the byproduct ME enters an esterification system to be recycled. The process is simple, the products methanol and CO can be returned to an EG system, and the method is an ide