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The quality of lubricant base oils needs to be improved. At present, Daqing crude oil is the only crude oil used to produce high-viscosity index base oils in China's old three processes. However, Shengli crude oil, Liaohe crude oil, and Xinjiang crude oil cannot produce qualified high-viscosity products using traditional techniques. Index base oil, crude oil processed by several companies including Jingmen and Jinan are all intermediate or near intermediate bases. The base oil viscosity index produced by traditional processes does not meet the requirement of high viscosity index. The quality of China's base oil is compared with that of foreign companies. There is a big gap, which is also one of the reasons that the high-grade lubricant market is gradually occupied by foreign companies' products.
After 2000, China's lubricating oil market will mainly be SE/SF, CC/CD, and it is expected that by 2005, the number of SE/SF grades will account for 80%, and that of diesel engine oils above CD grade will account for 70%. The development trend of oil will inevitably require the development of high-grade and multi-grade oil, and the use of hydrogenation technology to produce base oil must be a development direction.
The specific production process for the base oil is a three-stage full hydrogenation process or a combination of solvent refining-hydroprocessing and solvent dewaxing-hydrotreating. It should be based on different raw material properties and product requirements and the refinery Some solvent refining, solvent dewaxing conditions, local conditions, determine a reasonable process, so as to obtain high-grade base oil with less investment.
April 01, 2024
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