Seek the process flow and development prospects of methanol protein and ethylene glycol

The technology for producing ethylene glycol from ethylene currently uses pure oxygen and ethylene as raw materials; an oxidation reaction generates epichlorohydrin, which is then hydrated to produce ethylene glycol. There are mainly three companies in the world that possess this technology: Shell, SD, and DOW. The production capacity utilizing the technologies of these three companies accounts for about 91% of the world’s total. All large-scale ethylene glycol plants in the country were built through technology introduction.

Methanol proteins are still in the laboratory stage, right? ! ! Ethylene dimethanol is as follows: Synthesis of ethylene glycol from syngas. ① In the first step, methanol is oxidized and carbonylated to form dimethyl oxalate. *The NO and CH3ONO compounds are reused, thus avoiding environmental pollution ； ——Preparation of CH3ONO carbonylation catalysts (usually Pt/C), activity, selectivity ； ——Lifetime of CH3ONO carbonylation catalyst ； ——Design of CH3ONO carbonylation reactor ； ——Selection and optimization of operating conditions ； ——Purification of feed gases CO, O2, and NO. ②　The second step is the hydrogenation of dimethyl oxalate: It is necessary to develop a hydrogenation catalyst that possesses good activity and selectivity, as well as a long service life. The issue of **excess hydrogen** in the reaction and the recycling of unreacted hydrogen also needs to be considered.