Design and start-up of FCC gasoline selective hydrotreating unit

In the 1.3 MM TPY FCC gasoline selective hydrotreating unit of a grass-roots refinery with a capacity of over 10 million tons per year,the CDHydro process and catalyst of American CDTECH Company has been applied.While separating FCC gasoline into light and heavy gasoline in the hydrotreating distillation column,mercaptan and diolefine in light gasoline are removed.The process flow,reaction mechanisms,technical features,start-up and performance tests are described in detailed.The operation demonstrates that the unit capacity,product specifications and energy consumption have met the design requirements when processing low-sulfur crude oil.The unit's de-mercaptane removal performance when processing high-sulfur crude remains to be testified.