The prospects for the development of coal-to-olefins have attracted numerous projects to be launched. A large number of projects under construction and proposed projects have also triggered people's thinking about the scientific layout of the coal-to-olefins industrial chain and its benefits. At the second symposium on coal-to-olefins technology held recently, experts suggested that the downstream product layout of coal-to-olefins should focus on a high starting point and develop high-end products, and at the same time pay attention to the development and utilization of by-products and improve the integration of coal-to-olefin equipment. benefit.
According to the incomplete statistics of the Asian Chemical Consulting Company, China will start construction of coal-to-olefins projects within three years (including production and ongoing trials), and there are more than 20 coal-to-olefins projects. The planned total production capacity of coal-to-olefins has exceeded 20 million tons. At present, China's coal-to-olefins have formed three production modes: coal-methanol-olefins, methanol (methanol resources in concentrated areas)-olefins, methanol (imported or outsourced methanol resources)-olefins, and these three models have their own constraints. factor.
With regard to how a large number of coal-to-olefins projects are planned for downstream products, Liu Yanwei, deputy chief engineer of the Institute of Petroleum and Chemical Industry Planning, believes that there are four options to choose from: The first is the development of general-purpose resins. Typical products include polyethylene, polypropylene, and ethylene propylene rubber. , Ethylene-vinyl acetate copolymer, the product price in the 6500 ~ 12000 yuan / ton; Second, general resin + raw material monomer type, product plan, including polyethylene, polypropylene, ethylene oxide / ethylene glycol, styrene single Body/propylene oxide, phenolacetone, butyl octyl alcohol, acrylic acid and ester products, the market price is 6500~18000 yuan/ton; Third, resin + high-end special chemical type, the product includes polyethylene, polypropylene, ethylene oxide Alkylene/ethylene glycol, ethanolamine, ethyleneamine, glacial acrylic acid, etc., the market price is 6500~30000 yuan/ton; there is also a product layout is complementary chain type, olefin can produce vinyl chloride monomer - PVC - epoxy Propane-polypropylene glycol can also produce ethylene oxide/ethylene glycol-polyethylene terephthalate-polypropylene fibers.
Liu Yanwei pointed out that the competitiveness of coal to olefins is not just resources and prices, but more importantly, technology, R&D, quality, management, service, and sales network, and Other factors. The selection of construction models and product plans should comprehensively consider their own comprehensive strength and construction conditions. The existing industry base is a reasonable choice.
Experts believe that in the future considerable period of time, the oil route olefins will still be in a dominant position, while coal-based olefins mainly play a complementary role, in an auxiliary position. At present, in China's polyolefin supply, the gap of general products is smaller than that of high-end products. With the release of polyethylene and polypropylene production capacity in the Middle East in the next few years, combined with the gradual launch of new domestic projects, the market competition for low-end polyolefin products in China will be fierce. Therefore, experts pointed out that the downstream products of coal-to-olefins should focus on a high starting point and develop high-end products to ensure smooth sales of products.
The comprehensive utilization of coal-to-olefins by-products and the development of downstream products also require attention. The production of olefins will produce by-product mixed carbons. In recent years, China will build several million-ton coal-based olefins plants, and there will be a large increase in the production of by-product carbon tetrahydrocarbons. Therefore, the rational use of carbon 4 resources is an urgent problem to be solved in the layout of coal-to-olefin products, and it is also an important means for improving the economic efficiency of coal-to-olefin equipment. Zhou Hongjun, Professor of China University of Petroleum, introduced the development of key technologies for the comprehensive utilization of carbon tetrahydrocarbamate, such as the autogenous disproportionation of ethylene and 2-butene to increase propylene production, and the catalytic cracking of carbon tetra-carbon/carbons to produce propylene and ethylene, and the addition of isobutylene oxide. Techniques such as isobutylene and isobutane dehydrogenation to isobutylene have matured, providing powerful technical support for the comprehensive utilization of carbon tetrahydrocarbyl.
According to the incomplete statistics of the Asian Chemical Consulting Company, China will start construction of coal-to-olefins projects within three years (including production and ongoing trials), and there are more than 20 coal-to-olefins projects. The planned total production capacity of coal-to-olefins has exceeded 20 million tons. At present, China's coal-to-olefins have formed three production modes: coal-methanol-olefins, methanol (methanol resources in concentrated areas)-olefins, methanol (imported or outsourced methanol resources)-olefins, and these three models have their own constraints. factor.
With regard to how a large number of coal-to-olefins projects are planned for downstream products, Liu Yanwei, deputy chief engineer of the Institute of Petroleum and Chemical Industry Planning, believes that there are four options to choose from: The first is the development of general-purpose resins. Typical products include polyethylene, polypropylene, and ethylene propylene rubber. , Ethylene-vinyl acetate copolymer, the product price in the 6500 ~ 12000 yuan / ton; Second, general resin + raw material monomer type, product plan, including polyethylene, polypropylene, ethylene oxide / ethylene glycol, styrene single Body/propylene oxide, phenolacetone, butyl octyl alcohol, acrylic acid and ester products, the market price is 6500~18000 yuan/ton; Third, resin + high-end special chemical type, the product includes polyethylene, polypropylene, ethylene oxide Alkylene/ethylene glycol, ethanolamine, ethyleneamine, glacial acrylic acid, etc., the market price is 6500~30000 yuan/ton; there is also a product layout is complementary chain type, olefin can produce vinyl chloride monomer - PVC - epoxy Propane-polypropylene glycol can also produce ethylene oxide/ethylene glycol-polyethylene terephthalate-polypropylene fibers.
Liu Yanwei pointed out that the competitiveness of coal to olefins is not just resources and prices, but more importantly, technology, R&D, quality, management, service, and sales network, and Other factors. The selection of construction models and product plans should comprehensively consider their own comprehensive strength and construction conditions. The existing industry base is a reasonable choice.
Experts believe that in the future considerable period of time, the oil route olefins will still be in a dominant position, while coal-based olefins mainly play a complementary role, in an auxiliary position. At present, in China's polyolefin supply, the gap of general products is smaller than that of high-end products. With the release of polyethylene and polypropylene production capacity in the Middle East in the next few years, combined with the gradual launch of new domestic projects, the market competition for low-end polyolefin products in China will be fierce. Therefore, experts pointed out that the downstream products of coal-to-olefins should focus on a high starting point and develop high-end products to ensure smooth sales of products.
The comprehensive utilization of coal-to-olefins by-products and the development of downstream products also require attention. The production of olefins will produce by-product mixed carbons. In recent years, China will build several million-ton coal-based olefins plants, and there will be a large increase in the production of by-product carbon tetrahydrocarbons. Therefore, the rational use of carbon 4 resources is an urgent problem to be solved in the layout of coal-to-olefin products, and it is also an important means for improving the economic efficiency of coal-to-olefin equipment. Zhou Hongjun, Professor of China University of Petroleum, introduced the development of key technologies for the comprehensive utilization of carbon tetrahydrocarbamate, such as the autogenous disproportionation of ethylene and 2-butene to increase propylene production, and the catalytic cracking of carbon tetra-carbon/carbons to produce propylene and ethylene, and the addition of isobutylene oxide. Techniques such as isobutylene and isobutane dehydrogenation to isobutylene have matured, providing powerful technical support for the comprehensive utilization of carbon tetrahydrocarbyl.
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