Process for hydrotreating catalytic cracking feedstocks
US4780193A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1986 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Dec 22, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G69/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Catalytic cracking of hydrocarbon feedstocks is improved by hydrotreating the cracking feed under conditions of relatively low temperature, typically below 390.degree. 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 SO.sub.x 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.