The difficulty of ethylene oligomerization technology for the preparation of high-carbon alpha-olefin lies in a series of problems such as high catalyst price, catalytic activity and selectivity defects, and by-products are easy to clog pipelines. Most domestic manufacturers are in the pilot stage.
Three alpha-alkenes
1-butene, 1-hexene and 1-octene are the most widely used α-olefin, mainly used to produce the copolymer monomers of HDPE and LLDPE polyolefin elastomers to improve their tear and tensile strength, accounting for more than 50% of the total consumption of α-olefin.
1-butene is obtained mainly by C4 separation. After the successful development of isobutene ether synthesis into MTBE technology, C4 separation method has become the main production method of 1-butene. Ethylene dimerization process is used in a few plants, but due to high cost, it has been shut down more in recent years. Overall, the domestic 1-butylene production capacity is large. The main synthesis methods of 1-hexene and 1-octene include paraffin cracking, ethylene oligomerization, ethylene trimer/ethylene tetramer, Fischer-Tropsch synthesis, etc. In China, 98% of 1-hexene is used as a copolymer to produce high-performance HDPE and LLDPE, which is mainly high-density polyethylene, and the products are mostly tube materials and hollow materials. 1-octene synthesis is similar to 1-hexene, mainly ethylene oligomerization, ethylene tetramerization and Fischer-Tropsch synthesis, most of which are obtained by ethylene oligomerization or extraction separation process at present. However, the oligomerization method has low selectivity of 1-octene, high ethylene consumption and low yield.
More than half a year enterprise layout
The second announcement of the satellite chemical alpha-olefin project
On May 22, Xuwei New District issued an announcement for the secondary publicity of the α-olefin comprehensive utilization of high-end new materials Industrial Park project (Phase 1) of Lianyungang Petrochemical Co., LTD. The project is divided into two stages of construction, the evaluation content is the first stage of the project, the first stage of construction content is 2 sets of 100,000 tons/year alpha-olefin equipment, the second stage of construction content is 3 sets of 100,000 tons/year alpha-olefin equipment. The construction of the second phase is not included in this EIA.
National Energy Baotou coal chemical long chain α-olefin project an environmental impact assessment
On May 20, the National Energy Baotou Coal Chemical Co., Ltd. syngas direct conversion to long chain alpha-olefin 100-ton and 10,000-ton test project was the first public participation. The main construction content of this project is the direct conversion of hundred-ton and 10,000-ton syngas to long chain A-olefin devices and supporting systems. Among them, the 100-ton pilot plant to be built mainly carries out the reactor and process optimization work for the production of long chain α-olefin test, which is used as the basis for the production of long chain α-olefin test from 10,000 ton syngas. That is, on the basis of the hundred-ton verification test, it is scaled up to the 10,000-ton scale.
Sinopec high carbon alpha-olefin key raw materials and product application test project
On May 7, the "High carbon alpha-olefin Key raw materials and product application Test Project" of Yanshan Branch of Beijing Research Institute of Chemical Industry conducted an environmental impact assessment.
Maoming Petrochemical 50,000 tons/year 1-octene plant EIA approved
On April 17, Maoming Ecological Environment Bureau planned to publicize the approval decision on the environmental impact assessment document of "50,000 tons/year ethylene tetramerization 1-octene device". The technology of ethylene tetramerization to 1-octene developed by Yanshan Branch of Beijing Chemical Institute was adopted in the project.
Wanhua Chemical alphaolefin comprehensive utilization of high-end new materials project filing
Wanhua chemical subsidiary Wanrong new materials αolefin comprehensive utilization of high-end new materials project on February 4. The project is located in the eastern part of Jiangyin Port City Economic Zone, Fuqing, with the construction of two 100,000-ton/year α-olefin units (butene-1), one 100,000-ton/year α-olefin unit (hexene-1, octene-1), one 100,000-ton/year butadiene extraction unit, one 80,000-ton/year C3 separation unit, and one 1.1 billion yuan standard/year PSA unit. And supporting 1.95 million tons/year raw material processing equipment. An annual output of 200,000 tons of butene-1, 25,000 tons of hexen-1, 75,000 tons of octene-1, 90,000 tons of butadiene, 70,000 tons of propylene, 1.1 billion cubic meters of hydrogen.
Among the announced project plans, there are many pilot or pilot projects. Alpha-olefin technology has long been in the hands of international giants, a number of domestic leading enterprises are focusing on breaking through the process technology difficulties, pilot projects are crucial to localization. The pilot test is the transitional test that transforms the new product in the trial production stage into the production process, and is the key link of the industrialization of scientific and technological achievements. After the petrochemical industry has entered the stage of high-quality development from high-speed development, overcoming the technical bottleneck of high-end products has become one of the focuses of the industry. Therefore, the state attaches more and more importance to the pilot test. Since the beginning of this year, from the national level to the local level, policies on pilot tests have been introduced.
On January 16, the Ministry of Industry and Information Technology and the National Development and Reform Commission jointly issued the "Implementation Opinions on Pilot Innovation and Development of Manufacturing Industry", focusing on building modern pilot capacity and supporting industrial scientific and technological innovation and high-quality development. On April 8, the Ministry of Industry and Information Technology issued the Notice of the General Office of the Ministry of Industry and Information Technology on the quality work of industry and information Technology in 2024, which mentioned the moderate inclusive approval of the safety assessment and environmental impact assessment of chemical pilot projects, and the difficulty of the approval of chemical pilot projects and the long cycle.
On July 9, the website of the Shandong Provincial Department of Industry and Information Technology released the "Implementation Plan for the Pilot Innovation and Development of the Manufacturing Industry in Shandong Province" (hereinafter referred to as the "implementation plan"), which proposed the layout and construction of a number of pilot platforms with complete functions, open sharing and distinctive characteristics around key industrial areas.
Recently, the General Office of the Guangdong Provincial Government issued the "Implementation Opinions on Accelerating the Construction of a Modern Pilot Platform System to Promote the Mutual promotion of Industrial science and technology," proposing that the recent priority identification and concentration of resources to build a number of provincial pilot platforms that urgently need to "forge long boards, make up short boards, benefit small and medium-sized", and gradually establish a pilot platform system covering the province's key industrial fields.
