On April 26, Sinopec News Office revealed that recently, the catalytic cracking technology of crude oil independently developed by Sinopec's Research Institute of Petroleum and Chemical Industry was successfully industrially tested at Yangzhou Petrochemical to directly convert crude oil into chemicals such as light olefins and aromatics.
This is the world's first industrial application of crude oil catalytic cracking technology, marking a breakthrough in China's crude oil direct chemical production technology, and becoming the world's leader in crude oil catalytic cracking technology.
The catalytic cracking technology of crude oil is one of the technical routes for the direct production of chemicals from crude oil. This technology can “skip” the atmospheric and vacuum distillation and raw material refining processes of traditional oil refining, and directly convert crude oil into light olefins and aromatics, greatly increasing the output of high-value chemicals such as ethylene, propylene, and light aromatics, while significantly reducing comprehensive Energy consumption and carbon emissions.
According to Sinopec, the test results show that the total production rate of low-carbon olefins and light aromatics is increased by two times, up to more than 50%, that is, about 500,000 tons of high-value chemicals can be produced for every 1 million tons of crude oil processed by this technology. The successful application of this technology is of great significance for resolving the contradiction between overcapacity and insufficient chemical supply in China's oil refining.
Li Mingfeng, the director of the institute, said that this technology has opened up a new way for crude oil to produce chemicals. The estimated chemical yield can reach up to 70%, which means that every 1 million tons of crude oil can produce about about high-value chemicals. 700,000 tons. In the future, this technology will be applied to new chemical refineries or the upgrading of existing catalytic cracking units in refineries to ensure the safety of China's chemical supply chain, ease the contradiction between supply and demand in the industry, and help enterprises to transform and upgrade.
ASIACHEM Consulting: In-depth interpretation of Sinopec's direct chemical production technology from crude oil
Sinopec crude oil direct chemical production technology was developed by the Petroleum Research Institute, mainly through catalytic cracking. After the crude oil is cut into light and heavy fractions, they are respectively subjected to catalytic cracking to produce low-carbon olefins. The double riser reactor of a catalytic cracking unit is used to implement the two risers. The light and heavy fractions are fed into the two risers respectively, and the most suitable ones are given respectively. The operating parameters maximize the production of light olefins.
The difficulty of the process is that the naphtha and diesel fractions in crude oil have high hydrogen content compared with heavy oil fractions, but because of their small molecules, they are more difficult to crack, requiring special catalysts and more severe operating conditions. The adaptability to crude oil requires paraffin-based crude oil. If it is an intermediate base or a naphthenic base, the heavy fraction after cutting must be hydrogenated first, or a matching hydrogenation device.
According to relevant data, the result of a small test of crude oil in Jiangsu Oilfield is: the yield of ethylene + propylene reaches 33%. If considering the re-refining of C 4 olefins and light gasoline, the diene yield will be higher than this data. This data is comparable to ExxonMobil's crude oil direct steam cracking data in Singapore (the yield of ethylene + propylene is 35%).
The route has undergone a small test. After the pilot test, the industrial test will be completed at Yangzhou Petrochemical in 2021, which has been successful. The results of the Yangzhou industrial test showed that the total yield of low-carbon olefins and light aromatics was increased by two times, reaching more than 50%. ASIACHEM believes that, judging from the published data, PetroChina's technical chemicals yield has exceeded ExxonMobil's level.
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