Abstract: Based on the effective control of the deactivation factors of hydrogenation catalysts such as the formation of coke deposits and the growth of the active phase，the support preparation technology to build a smooth diffusion channel，the metal loading technology to stabilize the active phase，and the catalyst preparation technology to reduce the carbon deposition on active phase have been successively developed. Therefore，a novel catalyst preparation technology platform defined as "Reactant-active Phase Optimization & Cost-effective Key Technology(ROCKET+) was established. Based on this platform，RS-3100，a diesel hydrogenation catalyst with highly stable ultra-deep desulfurization and deep aromatic saturation performance,was successfully developed. Compared with previous generation catalyst，the stability of RS-3100 is improved by more than 30%，and the industrial packing density is reduced by more than 20%，which has a very high performance-price ratio. RS-3100 is suitable for medium and high pressure hydrogenation units fed by the secondary processed diesel fraction，and it can realize the production of the national Ⅵ standard diesel products with the mass fraction of the sulfur content less than 10 μg/g and the mass fraction of the polycyclic aromatic hydrocarbon less than 7% under mild operation conditions.

Key words: high stability, diesel hydrogenation catalyst, RS-3100, deactivation factors, ROCKET⁺ technology platform