Process for hydrotreating catalytic cracking feedstocks

Details Process for hydrotreating catalytic cracking feedstocks Process for hydrotreating catalytic cracking feedstocks

C - Chemistry, Metallurgy

10

G

196/90

C10G 69/04 (2006.01)

Patent

CA 1302329

F-4149 PROCESS FOR HYDROTREATING CATALYTIC CRACKING FEEDSTOCKS ABSTRACT Catalytic cracking of hydrocarbon feedstocks is improved by hydrotreating the cracking feed under conditions of relatively low temperature, typically below 390°C for start-of-cycle, and high pressure, typically above 10,000 kPa, preferably above 12,000 kPa. The use of these conditions favors aromatics saturation to produce a cracking feed of improved crackability so that higher conversion is achieved in the cracking step at constant cracking conditions with production of naphtha of good octane quality. At the same time, desulfurization is achieved to maintain cracker SOx emissions at required levels; the advantages of high pressure operation are more notable at high denitrogenation severities while still achieving a low catalyst aging rate.

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