Ethylene Glycol in China: The main process route for producing ethylene glycol from petroleum

From the perspective of the industrial chain, the upstream of ethylene glycol is mainly composed of raw materials such as oil, coal, natural gas, and methanol. In the midstream market, according to the different preparation processes of ethylene glycol, it is mainly divided into oil to ethylene glycol and coal to ethylene glycol. The oil production process is also divided into naphtha feedstock method and ethane feedstock method (natural gas production), which are both used to produce ethylene glycol through ethylene oxide production; Coal production processes include oxalate method, methanol synthesis method, and direct synthesis method. In China, oil to ethylene glycol has the largest production capacity and is widely used, but it is subject to the price of crude oil; Coal to ethylene glycol has a short process, a wide range of raw materials, and low prices. However, the environmental load is large, and the initial investment in the device is huge, resulting in high costs.

As of February 2, the overall starting load of ethylene glycol in Chinese Mainland was 62.40%, of which the starting load of coal to ethylene glycol was 56.19%. The reasons for the low operating rate of domestic coal to ethylene glycol plants mainly include excessive project production, oversupply of products, and a positive correlation with high steam consumption and the absence of upstream and downstream industrial chains, or the fact that the project is built in the west, resulting in high transportation costs, as well as the impact of national "dual carbon" strategy, enterprise safety issues, high costs, and other factors. In the production process of coal to ethylene glycol, trace impurities such as aldehydes, acids, alcohols, and esters, which are different from petroleum routes, may have a negative impact on the dyeing of high-end spinning products. Therefore, downstream polyester spinning enterprises prefer oil to ethylene glycol, greatly reducing the living space of coal to ethylene glycol devices. Based on China's energy structure of "more coal and less oil", China has vigorously promoted the production route of coal to ethylene glycol. Oil based technology and coal based technology have become technologies that can be used to produce ethylene glycol on a large scale in China. In the context of "dual carbon", green, environmental protection, and energy conservation will become the development direction of the ethylene glycol industry.

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