[Ocean Chemical News] China Petroleum's slurry method polyethylene catalyst scale-up preparation and industrial application test were successful
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It was learned on October 29 that the "Slurry Method Polyethylene Catalyst Scale-up Preparation and Industrial Application Test" led by China Petroleum and Petrochemical Research Institute and jointly completed by Jilin Petrochemical, Liaoyang Petrochemical and others has achieved breakthroughs in the design and development of catalysts and new product development after 8 years of research.: The project developed the slurry polyethylene catalyst PSE-100 with independent intellectual property rights, breaking the monopoly of foreign catalysts and comprehensively improving the development strength of PetroChina in the field of slurry polyethylene catalysts. This is a major breakthrough made by PetroChina in the field of polyethylene catalysts. This project has obtained 6 domestic and foreign invention patents. On October 23, China Petroleum Science and Technology Management Department organized and held an acceptance evaluation meeting for major technical field test projects such as "Slurry Process Polyethylene Catalyst Scale-up Preparation and Industrial Application Test" at Jilin Petrochemical. After listening to the report by the project manager Yi Jianjun, director of the Polyolefin Research Office of the Petrochemical Institute, the experts agreed that the project work was solid, the technology research and development and production application results were remarkable, and the organization was effective. The overall score was 91.8 points (excellent). They also hoped that the project team would continue to optimize the catalyst performance in the subsequent research and development and accelerate the promotion and application of the Hostalen process unit of PetroChina. The establishment of major field test projects is an important measure for PetroChina to enhance its independent innovation capabilities and accelerate the development of its chemical business. “The "Slurry Method Polyethylene Catalyst Scale-up Preparation and Industrial Application Test" project is the first batch of major on-site test projects in CNPC's polyolefins. He Shengbao, President and Party Secretary of the Petrochemical Research Institute, introduced that the project was initiated in 2010. After 8 years of research, the slurry polyethylene catalyst PSE-100 with independent intellectual property rights was successfully developed, and the industrial test was completed this year at the Jilin Petrochemical Ethylene Plant. As a major scientific and technological field experiment project of the group company, the "Slurry Method Polyethylene Catalyst Scale-up Preparation and Industrial Application Test" project team and cooperative enterprises Jilin Petrochemical and Liaoyang Petrochemical overcame many difficulties, lived up to expectations, completed all research content, and achieved a series of research results.: Compared with the imported catalyst Z501, the developed special catalyst for pressure-resistant pipes is superior to the imported catalyst Z501 in terms of copolymerization performance and wax content, and can be applied to Hostalen process production equipment. ； Based on catalyst morphology repair technology, we independently developed the third component modulation technology and multi-stage precipitation control technology. We completed industrial trials at the 300,000 tons/year high-density polyethylene unit of Jilin Petroleum Ethylene Plant, producing a total of 1,470 tons of high-density polyethylene products. The performance indicators of the target products meet the Q/SY 1679-2014 quality standards for high-density polyethylene resin JHMGC100S products.
The technical characteristic of the slurry method is that the polymer produced is suspended in the diluent, and the pressure and temperature during the production process are low. The slurry process is the main method for producing HDPE. The loop slurry process is mainly used to produce HDPE and LLDPE. Its typical representative processes are the Chevron Phillips process, the Borstar process of Borealis and the Innovene S process of Ineos. The kettle slurry process is only suitable for the production of HDPE resin. Typical representatives include LyondellBasell's Hostalen process, Mitsui Chemicals/Prime Polymer's CX process and Equistar-Maruzen process.
Loop slurry method Loop slurry method Chevron Phillips polyethylene process The Chevron Phillips process loop reactor is equipped with a jacketed closed-circuit cooling water system and can produce HDPE, MDPE, and LLDPE with high product quality and stability. The product density range is 0.916~0.970g/cm3, and the MFR is 0.15~100 g/10min ethylene homopolymers and copolymers. Usually the reaction pressure is 4.2MPa and the reaction temperature is 90~109℃. Domestic companies that adopt this production technology include: Shanghai Jinfei 135,000 tons ； Maoming Petrochemical 350,000 tons.
Loop slurry method Borstar polyethylene process The Borstar process is a bimodal polyethylene production process successfully developed by Borealis. The process is mainly composed of a loop slurry reactor and a gas-phase fluidized bed reactor in series, and can control the molecular weight distribution of the product as needed. Using ZN catalyst, the product density range is 0.918~0.970g/cm3, and the MFR range is 0.02~100 g/10min. The reaction pressure of the loop slurry reactor is 6.5MPa, and the reaction temperature is 90~109℃. The reaction pressure of the gas phase fluidized bed reactor is 2.0MPa, and the reaction temperature is 80~110℃. The Borstar process can produce bimodal and unimodal LLDPE, MDPE and HDPE. The maximum design capacity of a single line of this process can reach 300,000 tons/year. Domestic companies that adopt this production technology include: Shanghai Petrochemical 250,000 tons.
Kettle-type slurry method Kettle-type slurry method Hostalen polyethylene process LyondellBasell Company's Hostalen process uses two stirred tank reactors connected in parallel or in series for slurry polymerization. It is used to produce HDPE with a single-modal, bimodal or broad-peak molecular weight distribution and a specific co-monomer content in the high molecular weight part. The Hostalen process uses a titanium catalyst, the reaction pressure is 1.0MPa, the temperature is 76~85°C, the comonomer is butene, the product density range is 0.939~0.961g/cm3, and the relative molecular mass range: 50,000 to 250,000. The material and energy consumption per ton of product produced is: 1.015t of ethylene and comonomer, 400kg of steam, 350kwh of electricity, and 165m3 of cooling water. The current maximum production capacity of this technology in a single line can reach 350,000 tons/year. Products such as films, hollows and pipes have a certain reputation in the world. Domestic companies that adopt this production technology include: Sichuan Petrochemical 300,000 tons ； Liaoyang Petrochemical 70,000 tons ； Fushun Petrochemical 350,000 tons ； Jilin Petrochemical 300,000 tons ； Hengli Petrochemical 400,000 tons ； Baolai Petrochemical 350,000 tons ； 300,000 tons from PetroChina Tarim Branch.
At 16:00 on September 6, the polyethylene unit of Yan'an Energy and Chemical Co., Ltd. using Basel's Hostalen ACP process was successfully put into operation, and qualified HS GC7260 polyethylene powder was produced in the early morning of the next day. At 15:00 in the afternoon, the extrusion granulation unit was successfully started to continuously produce high-density polyethylene. The smooth commissioning of this device marks that Aneng Petrochemical Company has opened up all its main processes, seizing the opportunity in the increasingly fierce market competition and creating two "firsts".”: The country’s first polyethylene plant using Basel’s Hostalen ACP process ； The world's largest single-line polyethylene plant with an annual output of 450,000 tons and a daily output of 1,230 tons of polyethylene pellets.
The total investment of the 600,000 tons/year ethane-to-ethylene project of PetroChina Tarim Oilfield Branch is nearly 11.1 billion yuan. It will build 762,000 tons/year ethane recovery, 600,000 tons/year ethylene unit, 300,000 tons/year full-density polyethylene unit, 300,000 tons/year high-density polyethylene unit, polyethylene products, by-product hydrogen, fuel gas, C3+ and other products in the Korla Petroleum and Petrochemical Industrial Park. The project is planned to start construction at the end of 2018 and is expected to be completed and put into operation in June 2021. The ethylene unit uses CNPC's own technology, the FDPE unit uses the Unipol low-pressure gas phase fluidized bed process, and the HDPE unit uses the BASELL Hostalen ACP process. After the Tarim Oilfield light hydrocarbon project is completed, the project will have an annual output value of 8 billion yuan, tax revenue of 940 million yuan, an internal rate of return of more than 15%, and an investment payback period of 7.8 years. This project is the first large-scale ethylene project in southern Xinjiang and will also fill the gap in domestic production of ethylene from its own ethane resources.
What equipment is used for slurry transportation?
Will the slurry pump get stuck if it encounters particles with larger particle sizes?