A method for converting inferior heavy oil into light oil by two-stage slurry-bed hydroconversion
By employing a two-stage slurry bed hydrogenation process and microbubble hydrogen technology, the problems of high coke production and low light oil yield in slurry bed hydrogenation units have been solved. This has enabled the efficient conversion of inferior heavy oil into light oil, extending unit life and increasing production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PETROCHINA CO LTD
- Filing Date
- 2022-12-19
- Publication Date
- 2026-07-14
AI Technical Summary
Existing slurry bed hydrotreating technology produces a large amount of coke when processing low-quality heavy oil, leading to equipment blockage, affecting long-term stable operation, and resulting in low light oil yield.
A two-stage slurry-bed hydrocracking process is adopted. The first stage is carried out at a higher temperature and pressure for hydrocracking, and the second stage is carried out at a lower temperature and pressure for further conversion. Combined with microbubble hydrogen and heavy fraction recycling, solid coke and potential coking precursors are separated, the amount of coking is controlled and the yield of light oil is improved.
Maximize the conversion of inferior heavy oil into light oil with a low coke production rate, extend the stable operation time of the unit, increase the yield of light oil, and reduce equipment investment.
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Figure CN118222322B_ABST