In addition, coal tar downstream anthracene oil, phenol oil, washing oil, industrial products, among which anthracene oil deep processing can get industrial anthracene, refined anthracene, carbazole, etc., can be directly used for the production of carbon black. Coal bitumen is used to produce electrolytic aluminum and can be directly used to produce carbon black. The washing oil can prepare coking washing benzene, which can be further processed to obtain methyl naphthalene, dimethyl naphthalene, crude quinoline, etc. Phenolic oil is generally used for fuel oil, and industrial naphthalene can be made of water reducer and refined naphthalene. Among them, the products with development prospects, such as carbazole, quinoline, conductive carbon black, methylnaphthalene, dimethylnaphthalene, pyridine and its derivatives, are worth further research and discussion in traditional coal chemical enterprises.
What are the transformation directions of coal-to-olefin enterprises?
Coal to olefin refers to the process of using coal to produce ethylene and propylene. At present, coal to olefin enterprises mostly support polyethylene and polypropylene. Coal-to-olefin is the main representative of the development of China's new coal chemical industry, and it is also the direction of the first industrialization of China's new coal chemical industry, which plays a very important role in the development of China's coal chemical industry.
The representative products in the process of coal to olefin are: ethylene, propylene, high olefin C4, polyethylene, polypropylene, methanol and other products, among which methanol is the intermediate transition product, basically no foreign sales. Therefore, if you want to achieve the fine transformation and upgrading of coal-to-olefin enterprises, it is mainly in ethylene, propylene, polyethylene, polypropylene and high olefin carbon four products.
At present, the ethylene in China's coal-to-olefin enterprises is polypolymerized into polyethylene, which is basically not exported. If the coal-to-olefin enterprises have a more stringent competitive environment, the polyethylene operating rate can be appropriately reduced, and the ethylene surplus can be moved as the extension direction of the niche chemical industry chain. Ethylene downstream niche has a promising direction of development, such as oligomerization production of α-olefin, dimerization, trimerization production of single α-olefin, and ethylene as a raw material production of norbornene and COC, EVOH and other products, all have certain development prospects.
The development idea of propylene and polypropylene is similar, it can also reduce the start of polypropylene, reserve the propylene resources of Fuyu, and develop the downstream niche chemical production. The downstream minority development direction of propylene can focus on TPX, acrylamide-polyacrylamide, special acrylic ester, ASA resin, hexafluoropropylene and other products, which are worth further investigation.
In addition, we can expand the development direction of high-end polyethylene and polypropylene, improve the product types of polyethylene and polypropylene, and seek differentiated development in the field of polyolefin. At present, the high-end models with the future development direction of polyethylene are: linear metallocene polyethylene, high voltage polyethylene cable material, high pressure polyethylene injection plastic, low voltage PERT polyethylene pipe material, high pressure polyethylene microfiber material. The high-end models of polypropylene with future development direction are: three high and two low polypropylene, terpolymer film polypropylene, transparent and super-permeable polypropylene, foamable polypropylene, antibacterial and mildew resistant polypropylene, reinforced and toughened polypropylene, G resin, low VOC impact resistant polypropylene, high fluidity blue phase high crystal polypropylene, transparent impact resistant polypropylene, etc.
Coal-to-olefin There is another product is high olefin C4, which refers to C4 olefin with a n-butene content of 80% and above, and is a by-product of the coal-to-olefin production process, accounting for about 10% of coal-to-ethylene and propylene. At present, China's high-olefin C4 products are mostly mixed with isobutane, which is used as a raw material for C4 alkylation, but it does not know that this reduces its own value.
At present, the development directions of high-olefin C4 fine chemicals with development prospects are as follows: 1-butene can be separated and polymerized to poly1-butene to achieve high-end new material product production; N-butene can be isomerized to isobutene, and then further separated and extracted to produce high-purity isobutene, which can be used as the production of tert-butylamine, tert-butylphenol, isovaleraldehyde and methylallyl alcohol in the downstream. In addition, the downstream direction of high-purity isobutylene can reach more than 50 kinds, which has a very complex selectivity.
In addition, the downstream of n-butene can be used as an extension of the industrial chain such as 2-PH, 2-methylbutyraldehyde, 2-methylbutyric acid, isononyl alcohol, G resin, 4-carbon POE, etc., which is a very valuable extension direction of the industrial chain and worthy of further study. In addition, the carbonylation reaction of n-butene can prepare a variety of plasticizer alcohols with many options, which provides another development idea for high-carbon alcohols in China.
What are the transformation directions of coal-to-ethylene glycol enterprises?
Coal to ethylene glycol refers to the process of using coal to produce methanol and then ethylene glycol, which is an important representative of replacing petroleum-based ethylene glycol. The main products in the production process of coal to ethylene glycol are ethylene glycol, dimethyl oxalate, methanol and other products, of which the downstream of ethylene glycol can be extended in a clear direction, and the minority direction is PTT polyester, which is an upgraded alternative product of traditional polyester, but it is currently limited by the slow development of the PDO industry, so there is no explanation here.
It is important to say that dimethyl oxalate, a byproduct of coal to ethylene glycol, can be extended in the direction of: Oxalic acid, methyl glycolate, glycolic acid, polyglycolic acid, dimethyl carbonate, methyl ethyl carbonate, polycarbonate, glycolic acid, diethyl oxalate and other products, among which the use of dimethyl oxalate and oxalic acid as raw materials for the downstream extension of the industrial chain, Pingtouge believes that it is a feasible research direction, but also an important direction for the extension of the fine chemical industry chain of coal to glycol enterprises.
As for the downstream industrial chain extension direction of dimethyl oxalate, there are prospects for development: oxalic acid, methyl glycolate, glyoxalic acid, methyl ethyl carbonate, etc. These directions have a wide range of downstream applications and are related to new energy properties, worthy of further study.
What are the transformation directions of coal-to-oil enterprises?
Coal-to-oil refers to the chemical production of similar oil components from the synthesis of coal Fischer-Tropsch, which represents the products of liquefied gas, stable light hydrocarbons, Fischer-Tropsch liquid wax, normal Fischer-Tropsch wax, iso-Fischer-Tropsch wax, maleane, n-undecane, n-dodecane, n-tridecane, n-tetradecane, n-cetane, iso-alkanes and other products. Because the core industry of coal-to-oil enterprises is Fischer-Tropsch synthesis, the product components are numerous, and if each product is further separated, the list of more than 40 products will be obtained, which is very complicated.
In short, the current important research direction of coal-to-oil enterprises is the separation of downstream light Fischer-Tropsch wax, to obtain a series of α-olefin, and light liquid wax with more refined components. There are many directions for the downstream expansion of these products, and with the support of the rapid development of technology, China's coal-to-oil enterprises can achieve more refined production, which contributes to the rapid progress of China's fine chemical industry.
