Daqing Huanqiu completed the "Industrial Pilot Project of Complete Technology for the Synthesis of Octene and Other α-olefins" process package
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The "Industrial Experimental Project of Complete Technology for the Synthesis of Octene and Other α-Olefins" is one of the major scientific and technological projects of the group company jointly researched and developed by Daqing Huanqiu Company, Daqing Chemical Research Center, and Daqing Petrochemical Company, leveraging their respective advantages. The company is responsible for preparing and publishing the process package, and the intellectual property rights and benefits are shared by the three companies. This technology has the advantages of advanced technical indicators, short process flow, flexible and stable operation, safe production process and environmental protection. The research and development of this project will have great economic and strategic significance for the group company in curbing the price monopoly of foreign products, accelerating the company's independent research and development process of high-end products, solving the shortage of PAO synthetic raw materials, and promoting the sustainable development of the lubricant business field. The project was initiated in October 2016, the feasibility study was completed in February 2019, the process package design was completed at the end of May 2020, and it is planned to be handed over on March 30, 2021.
On April 20, after the Daqing Chemical Research Center broke through the core technology of the reactor, the project team started the final round of process simulation and process system design based on the final data. This project is the first industrialized device in China. It realizes that one device can switch to produce three products (1-hexene, 1-octene, and decene). The control is very complicated, and there is no similar device for reference. In order to save investment, the project plans to use the existing equipment of the hexene-1 unit of the Second Chemical Plant of Daqing Petrochemical Company for transformation, which greatly increases the difficulty of engineering design.
The process package has just been formed through the integration of production and research. I wonder how large the demonstration device is?
Poly-alpha-olefin synthetic oil is obtained from alpha-olefins (mainly C8-C12 olefins containing double chains between the first and second carbon atoms) through oligomerization or co-oligomerization reaction and hydrogenation saturation under the action of a catalyst. It has better antioxidant properties It has the advantages of stability and viscosity-temperature properties, high viscosity index, low pour point, and good sensitivity to additives. It can be mixed with mineral oil in any proportion. It is an ideal base oil for preparing high-grade, special-purpose lubricants, and will be the main force of high-grade synthetic lubricants in the future. .
Currently, the world's main processes for producing α-olefins include ethylene oligomerization and paraffin cracking. Among them, the ethylene oligomerization method is the main method for producing α-olefins, and the α-olefins produced by this method account for 94% of the total α-olefin production. l%. The ethylene method is often used to produce α-olefins abroad. C8-C10 α-olefins are polymerized by ethylene, and then directional polymerization with a Lewis acid complex catalyst can be used to produce poly-α-olefin products, which are suitable for preparing high-grade engine oils, automatic transmission fluids, special industrial oils, and greases. Domestic production of poly-α-olefins mainly relies on α-olefins cracked by paraffin wax. Due to the high oil content of paraffin, the content of cracked normal α-olefins is low (generally less than 65%). my country's poly-alpha-olefins are basically not hydrogenated, and double bonds still remain in the polymerized oil. Therefore, although its low-temperature performance is slightly better, other properties are similar to mineral oil. Therefore, the products of the wax cracking unit have many impurities and are only suitable for use in synthetic lubricants, alkylbenzenes, etc. Normal manufacturers include Fushun Petrochemical Plant No. 1, Fushun Petrochemical Plant No. 2 and Lanzhou Lubrizol Lanlian Additive Co., Ltd.
Currently, poly-α-olefins are mainly produced by ethylene-catalyzed oligomerization to obtain C4-C20+ linear products. Shell, BP, Chevron Phillips, Sasol, IFP and Idemitsu Petrochemical Company have all developed patented technologies in this area. domestic: On April 24, 2008, Shanghai Nak Lubrication Technology Co., Ltd. announced that China's first medium and high viscosity poly-alpha-olefin device with completely independent intellectual property rights was put into commercial operation in Shanghai. At the end of August 2009, the country's first 1-octene prototype test device was built at the China Petroleum and Petrochemical Research Institute. The 1-octene production scale of the prototype test device is 21 tons/year. Successfully developed a new chromium-based catalyst system for tetrapolymerization of ethylene into 1-octene. In March 2010, Daqing Petrochemical Company's designed 1-hexene unit with an annual output of 5,000 tons was successfully put into operation, producing hexene-1 products with a concentration of 99.2% and meeting national standards. Daqing Petrochemical's 1-hexene production capacity will eventually reach 100,000 tons. In June 2014, a polyalphaolefin factory was put into production in Shanghai. After completion, the plant's annual output of poly-alpha-olefins will reach 15,000 tons, and it will also be able to produce 10,000 tons of alkyl naphthalene base oil each year. The plant will manufacture three grades of high-viscosity polyalphaolefin, which will be marketed under the brand name "Sinosyn". At present, domestic manufacturers that produce poly-alpha-olefin synthetic oil include the Third Chemical Plant of Yanshan Petrochemical Company, the Chemical Plant of Lanzhou Petrochemical Company, and the First Chemical Plant of Fushun Petrochemical Company.