A novel catalytic cracking process named MIP was developed by Research Institute of Petroleum Processing (RIPP), SINOPEC, to produce cleaner gasoline with lowered olefin content but increased propylene yield. The MIP process features a unique riser consisting of two sequential reaction zones with varied diameter. Chemical reactions are intensified selectively in different reaction zones to achieve a better product distribution. To fully implement the potential of the MIP process, a proprietary catalyst RMI was developed by adopting an AIRY zeolite with improved active sites accessibility, modified ZRP zeolite, and modified matrix. Benefiting from the coke deposition preferentially occurring in the mesopores of the matrix, most of the active sites of the RMI catalyst are preserved in the first reaction zone, promoting the transformation of olefins produced in the first reaction zone into propylene and iso-paraffins in the second reaction zone. Commercial MIP trial confirms that the RMI catalyst is capable of lowering the olefin content in gasoline, increasing the octane number of gasoline, and increasing the yield of propylene.

Customized catalyst for MIP process to increase cleaner gasoline and propylene production

253rd National Meeting (2017)

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