Catalytic conversion method for increasing cetane number barrel of diesel

摘要

A catalytic conversion process uses a catalytic cracking catalyst having a relatively homogeneous activity containing mainly large pore zeolites in a catalytic conversion reactor. The reaction temperature, residence time of oil vapors and weight ratio of the catalyst/feedstock oil are sufficient to obtain a reaction product containing from about 12 to about 60% by weight of a fluid catalytic cracking gas oil relative to the weight of the feed stock oil and containing a diesel. The reaction temperature ranges from about 420° C. to about 550° C. The residence time of oil vapors ranges from about 0.1 to about 5 seconds. The weight ratio of the catalytic cracking catalyst/feedstock is about 1-about 10.

主权项

1. A catalytic conversion process for producing diesel, comprising:
loading a catalyst into a catalytic conversion reactor, wherein the catalyst comprises an aged catalyst having a reduced activity; contacting a feedstock oil with the catalyst in the catalytic conversion reactor to produce oil vapors; separating the oil vapors to obtain diesel and fluid catalytic cracking gas oil, wherein a weight of the fluid catalytic cracking gas oil relative to a weight of the feedstock oil ranges from 12% to 60%, a reaction temperature ranges from about 420° C. to about 550° C., a residence time of the oil vapors ranges from about 0.1 second to about 5 seconds, a weight ratio of the catalyst to the feedstock oil ranges from about 1 to about 10, wherein less than about 10 vol.% of the catalyst has a particle size of less than 40 μm, less than about 15 vol.% of the catalyst has a particle size of greater than 80 μm, and the remainder of the catalyst has a particle size of from about 40 μm to about 80 μm, wherein the volume percentage is calculated based on a total volume of the catalyst.