I.Case in brief

This case relates to a patent for a cooled regenerated catalyst circulating method in the field of catalytic cracking, which is mainly used for catalytic cracking of heavy raw materials and catalytic upgrading of gasoline. The patent involved has achieved commercial success in the society and won the national science and technology award after it was published. The title of the patent is: “Method and equipment for circulating cooled regenerated catalyst”. Specifically, it relates to a fluidized catalytic cracking process where hydrocarbon feedstock is caused to contact and react with the catalyst in the riser reactor, the reactant flows into the settler to separate the catalyst from oil and gas, the separated catalyst to be regenerated is stripped in the stripping section and then enters the regenerator for coking regeneration, and thereafter, the regenerated catalyst is returned to the riser reactor for recycling. Claim 1 recites “fluidized media distribution facilities are provided at the lower part, and a catalyst mixing buffer space is provided in the downstream”, and such technical feature is also described in the description accordingly. The key technical dispute in this case focuses on the “mixing buffer space” located “downstream”.
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