Abstract: To meet the demand for high-quality ethylene raw in the ethylene market, SINOPEC Research Institute of Petroleum Processing Co. Ltd. has developed second-generation MHUG-E dedicated hydro-upgrading catalysts RIC-33 and RIC-31. Compared with the previous generation catalyst RHC-131, RIC-33 and RIC-31 catalysts are more suitable for processing straight-run diesel, and the unconverted diesel obtained from the reaction has a higher content of paraffin. Both unconverted diesel and light naphtha fractions can be used as high-quality ethylene raw. The experimental results of raw material adaptability, catalyst stability, and regenerability show that RIC-33 and RIC-31, have good adaptability to raw materials, high catalyst activity, and stability. The regenerated catalysts have similar activity and paraffin-selectivity comparable to the new catalysts.

Key words: ethylene, MHUG-E, hydroupgrading, catalyst, straight-run diesel, paraffin