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Ｍ Ｃ Ｉ（最大限度提高十六烷值）工艺是一种改善劣质柴油馏分（如催化裂化柴油及其它高芳烃含量柴油）的加氢改质新工艺。 Ｍ Ｃ Ｉ工艺介于加氢精制和中压加氢改质（ Ｍ Ｐ Ｈ Ｇ）或中压加氢裂化（ Ｍ Ｐ Ｈ Ｃ）之间，它既具有加氢精制柴油馏分收率高的优点，又具有 Ｍ Ｐ Ｈ Ｇ 或 Ｍ Ｐ Ｈ Ｃ 对十六烷值提高幅度大的优点。 Ｍ Ｃ Ｉ工艺在接近加氢精制操作条件下利用一种新型催化剂进行加氢精制反应（如 Ｈ Ｄ Ｓ、 Ｈ Ｄ Ｎ 等）的同时达到提高柴油十六烷值的目的。此技术的关键是控制芳烃开环而不断链。一般情况下， Ｍ Ｃ Ｉ工艺能使柴油十六烷值提高 １０ 个单位以上，柴油收率高于９５％ 。
The M C I (Maximization of Cetane Number) process is a new process for hydrotreating a low-grade diesel fraction, such as catalytically cracked diesel and other high-aromatics diesel. The M C I process is between hydrotreating and medium pressure hydrogen upgrading (M P H G) or medium pressure hydrocracking (M P H C) and has the advantage of high yield of hydrotreated diesel fraction , And has the advantage that M P H G or M P H C greatly increases the cetane number. The M C I process achieves the goal of increasing cetane number of diesel while using a new type of catalyst for hydrotreating reaction (such as H D S, H D N, etc.) near the hydrotreating operation conditions. The key of this technology is to control aromatic ring opening and continuous chain. Under normal circumstances, M C I process can make diesel cetane number increased by 10 units or more, diesel yield higher than 95%.