Impact of the transformation of the downstream methanol system

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In response to the impacts of the modifications made to the methanol production system for downstream products, as downstream applications for methanol develop, modifications have been carried out in this system to produce products such as ethylene glycol, 1,4-butanediol, and acetic acid. 1. Ethylene glycol: In the Pu Jing process, the purified syngas is subjected to deep cooling to separate carbon monoxide and hydrogen, which are then used separately in the synthesis of ethylene glycol. The impact on the methanol system is a reduction in the volume of process gas, while the impact after the modification of the methanol system is on the methanol production volume. 2. 1,4-Butanediol: Methanol is used to produce formaldehyde; formaldehyde is then used to produce 1,4-butyne diol, which is subsequently hydrogenated to yield 1,4-butanediol. The hydrogen to be used in this process is separated by pressure swing adsorption, with the desorbed gases such as carbon monoxide returning to the methanol system. The effects of the methanol system modification are the H/C ratio in methanol synthesis and the methanol yield. 3. Acetic acid: Carbon monoxide is used in the process of producing acetic acid from methanol; the carbon monoxide required for this process is separated using pressure swing adsorption, while hydrogen is returned to the methanol system. The effects of the methanol system modification are the H/C ratio in methanol synthesis and the methanol yield.