Application of CPP

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The application of CPP has been in recent times. The technology of catalytic cracking of heavy oil to produce ethylene has not only attracted the attention of the two major companies, PetroChina and Sinopec, but also some companies in Zhejiang, Fujian, Jiangsu, Shandong, Liaoning and other places.* * Departments and some enterprises (especially small and medium-sized local oil refining enterprises and private enterprises with financial strength) are also eager to try. The reporter learned from interviews with relevant units and experts that the heavy oil catalytic cracking process is a new integrated refining and chemical process suitable for national conditions and has good market application prospects for the development of China's ethylene industry. 　　To effectively solve practical problems, as we all know, the development of petrochemical industry first requires the development of ethylene. The production of ethylene has become a measure of * * An important symbol of the development of the petrochemical industry. However, the shortage of light hydrocarbon resources in China has become one of the factors that seriously restricts the rapid development of China's ethylene industry. Although China's crude oil resources are insufficient, the proportion of heavy oil components is high, and the raw material resources for heavy oil cracking are relatively abundant. Therefore, whether from the perspective of making good use of heavy oil or increasing ethylene production, developing catalytic cracking of heavy oil to produce olefins technology is an objective requirement. Affected by factors such as the layout of ethylene production, many domestic provinces with relatively scarce ethylene resources and several large state-owned companies want to seize the opportunity to build ethylene production sites from heavy oil, which has also promoted the further heating of this project from the outside. In the mid-1980s, China began early research and development on catalytic cracking of heavy oil to produce ethylene. Among them, the HCC technology developed by Sinopec Luoyang Petrochemical Engineering Company and the CPP technology developed by Sinopec Beijing Petrochemical Science Research Institute are adapted to China's urgent need to develop ethylene and the shortage of raw materials. They were developed based on the fact that there is a relatively large amount of domestic heavy oil and using the basic conditions of relatively mature domestic catalytic cracking technology. Industrial application begins. It is understood that CPP technology (catalytic pyrolysis of heavy oil) is a new catalytic pyrolysis technology for heavy oil developed by the Beijing Petrochemical Research Institute on the basis of DCC (deep catalytic cracking technology) through comprehensive improvements in catalysts, process parameters and device technical structures, mainly for producing ethylene. HCC technology (heavy oil direct contact cracking) is a new process successfully developed by Luoyang Company after more than ten years that uses a special catalyst to directly crack heavy oil to produce ethylene and other products. Both technologies have their own merits. Experts are very satisfied with the current progress of the two major technologies. Because these two different patented technological achievements have been promoted to industrial trials and are at the world's leading level. 　The first 80,000-ton/year CPP industrial unit was modified from a 120,000-ton/year DCC industrial unit. After the device underwent industrial testing from October 2000 to January 2001, experts identified it as: The technology is mature and the process is reliable. The existing catalytic cracking unit is appropriately modified to implement the CPP process. It is a new way to develop petrochemical industry based on catalytic cracking using heavy raw materials. According to the calibration data, once the unit reaches economic scale, its overall production cost will be lower than that of the steam cracking unit. According to the latest news, China's first 500,000 tons/year CPP industrial production unit has completed a feasibility study and will be built in Shenyang in early 2005. At Luoyang Petrochemical Company, the reporter learned that the first domestic HCC industrial test device for short-term process exploration using Daqing atmospheric residual oil as raw material was built in Qiqihar in July 2000. Since then, a 600,000-ton/year FCC industrial device has been transformed into an HCC industrial test device. The results of multiple industrial trials conducted over the past two years have shown that: The olefin cracking yield of this device is basically consistent with the medium-scale test data. ； Industrial products of catalysts have good cracking activity. Since the HCC process directly produces low-carbon olefins from heavy raw materials, there are many problems that need to be solved, and there is still a long way to go to achieve large-scale industrialization. 　　Both large and small refineries can benefit from the development of heavy oil catalytic cracking, which can not only alleviate the shortage of raw materials for China's traditional ethylene industry, but also alleviate the shortage of fuel and diesel markets. Some experts have made conservative comparisons: A HCC plant with a capacity of 4 million tons per year can be built to produce 1 million tons of ethylene per year. This is equivalent to solving 3.22 million tons of chemical light oil raw materials for tube furnace cracking ethylene with the same output. Since catalytic thermal cracking technology can be an effective and economically advantageous supplement to steam cracking technology in terms of raw material composition and product structure, some domestic scholars have suggested adding a heavy oil catalytic cracking unit to the existing large-scale oil refining and ethylene combined unit systems to achieve multiple combinations of steam cracking and catalytic thermal cracking in technology, raw materials and products, so as to achieve the purpose of maximizing the production of petrochemical raw materials in refineries. If successful, this will become a major feature of China's ethylene industry. Due to various reasons, there are a number of small and medium-sized oil refining companies in China. Most of these companies are the lucky ones who have "skidded" with the policy, but in terms of resources, capital, technology, etc., they have no advantages at all. If we can choose to use CPP, HCC and other technologies to develop deep processing of heavy oil, the raw material heavy oil will be easy to obtain ； The second main products, ethylene, propylene, butylene, etc., have many and wide utilization channels. ； At the same time, its implementation can be accomplished by modifying existing equipment. In this regard, many experts believe that CPP and HCC technology are likely to become a new way for small and medium-sized oil refining companies to develop and transform into complex directions such as petrochemicals and fine chemicals.