Fine coal chemical industry: extending industrial chain and seeking win-win situation through industrial grafting

wallpapers Industry 2020-12-09
Under the impact of low oil price and overcapacity of some products,

has entered a critical turning point in the development of modern coal chemical industry. How to develop a large number of coal to olefin projects built and under construction? How to realize multi production and deep processing of coal to liquid project? How can coal chemical raw materials produce more high value-added chemical products? At the 2015 high level Forum on fine development of China's coal chemical industry hosted by the China Chemical Industry Association last week, industry experts put forward a variety of technical paths on how to take the fine development road of coal chemical industry.

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coal to olefins: analysis and prediction of

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of the extended industrial chain. He pointed out that the supply and demand gap of ethylene industry will exist for a long time in the next few years, and coal to olefin will become an important supplement. At the same time,

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also pointed out that the downstream products of coal to olefins in China basically have the cost competitiveness to compete with other regions in the world except the Middle East. However, due to the huge investment scale of fixed assets per unit olefin and the oil price below $80 / barrel, the profitability of coal to olefin project can no longer meet the industry benchmark requirements. Therefore, he suggested that polyolefins should be mainly developed in areas with inconvenient logistics, and high-end polyolefins could be considered. The Secretary General of

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coal chemical industry special committee also put forward the same view. He believes that in the field of coal to olefins, new brands of polyolefin resins such as polyethylene copolymerized with α - olefins should be developed, and downstream ethylene and propylene products such as polyvinyl chloride, ethylene oxide, ethylene glycol, dichloroethane, phenol, propylene oxide and other downstream products should be produced by using petrochemical technology. He also introduced a representative technology route, coal through methanol to olefin, propylene carbonylation to n-butyraldehyde / isobutyraldehyde. With the development of coal to olefin industry,

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will increase the by-product C4 resources. But at the same time, China's 1-butene raw material has been facing the situation of short supply. The comprehensive utilization technology of C4, a by-product of coal to olefin developed by Kerry environmental protection company, solves this contradiction well. High purity (>

) for polyethylene production can be obtained by this technology The company's general manager Zhang Yong said that the world's first coal to olefin demonstration project - Shenhua Baotou coal to olefin project used C4 comprehensive utilization technology and catalyst provided by it. At present, the technology has been applied in five enterprises, with a total capacity of 100000 tons / year.

coal to liquids: broaden the product range

there are more than ten indirect liquefaction projects of Fischer Tropsch synthesis coal in China, with an annual capacity of nearly 24 million tons. However, almost all of these projects aim at fuel oil, and the products are too single. In this regard, many experts said that in fact, most petrochemical products and high value-added fine chemicals, such as high-quality high-carbon alcohols, long-chain olefins and high pour point paraffin, can also be obtained by Polygeneration and deep processing. However, due to the difference in composition between Fischer Tropsch synthetic oil and fossil crude oil, the existing crude oil processing technology can not fully meet the requirements of fine processing of Fischer Tropsch synthetic products. Therefore, the fine processing technology suitable for Fischer Tropsch synthesis products is developed to form a fine processing technology for the production of diversified products such as oil and chemicals with the best utilization of resources and energy The future development direction of indirect coal liquefaction technology. In order to realize the fine processing of Fischer Tropsch synthesis products,

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, first of all, the scale of Fischer Tropsch synthesis coal to oil unit must be increased. In this way, there are many kinds of chemical products and a large scale, so that the value of fine processing and extraction can be obtained. Secondly, she suggested that low-temperature and high-temperature Fischer Tropsch synthesis indirect liquefaction polygeneration technology should be adopted for Fischer Tropsch synthesis indirect coal to liquid technology, while high-temperature Fischer Tropsch synthesis should be the main method for large-scale industrial plants. In addition, according to the characteristics of high-temperature Fischer Tropsch synthesis polygeneration products, we should face the market and choose the fine processing scheme of large-scale high-low-temperature Fischer Tropsch synthesis products with low diesel / gasoline ratio, good market sales and good economic benefits, so as to improve the overall benefits of coal to liquid.

it is reported that the high-temperature Fischer Tropsch synthesis technology developed by Gung Mining Group will be used for the first time in the high-temperature Fischer Tropsch synthesis process. The 5000 ton oil / year pilot plant built by this technology can produce a variety of high-value-added organic chemical products while producing oil products. Sinopec (600028, Guba) Research Institute of petrochemical industry has carried out special research and development on the technology of hydrotreating Fischer Tropsch synthetic oil to produce high-grade base oil and paraffin, and has carried out the industrial test of long-term production of lube base oil and paraffin, and has completed the preparation of a million ton / year Fischer Tropsch synthesis process package It started construction in August 2015.

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coal to ethylene glycol: breaking through the technical bottleneck.

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oil prices have continued to decline recently, and the cost advantage of coal to ethylene glycol has almost disappeared. However, some coal chemical enterprises participating in the meeting still hope for coal to ethylene glycol. They believe that China's external dependence on ethylene glycol has reached 67.3%, and there is a big market gap. However, from the domestic point of view, the new capacity of ethylene glycol plant in the next few years is very limited, and the market volume will not be very large. Therefore, coal to ethylene glycol still has a good development prospect after breaking through its own technical bottleneck, which can be used as a direction of fine development of coal chemical industry. At present,

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are not fully mature, so the unit can not operate at full load, which weakens its cost advantage. The 200000 t / a coal to ethylene glycol project of Inner Mongolia Tongliao gold Coal Chemical Co., Ltd. is the first national demonstration project of coal to ethylene glycol recognized by the national development and Reform Commission. "From 2009 to 2014, we solved the problems encountered in production. Since June 2014, the 200000 t / a coal to ethylene glycol unit of Jinmei chemical industry has been in stable production, with an average load of more than 92%, with a daily output of more than 460 tons of ethylene glycol and more than 180 tons of oxalic acid. The excellent product rate of the product is over 99%, of which the transmittance of 220nm is close to 90%. All the indexes meet the national excellent standard. The products have been widely used in downstream polyester manufacturers At the forum, Zhang suoren, vice general manager of the company, introduced the operation of the device. In addition to the reasons that the plant can not reach the production capacity, the impurity content and ultraviolet transmittance of coal to ethylene glycol products can not fully meet the requirements of polyester grade. In view of this, Carey Environmental Protection Technology Co., Ltd
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