Process and apparatus for cracking hydrocarbons with recycled catalyst to produce additional distillate
US9783749B2 · kind B2 · utility
12Cited by
22References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2015 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Jan 1, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G45/44
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process and apparatus is for recycling LCO and/or HCO to an FCC unit to recover additional distillate. Spent catalyst recycle in the FCC unit may be used to improve distillate yield. A hydroprocessing zone may saturate cycle oil aromatics for cracking in an FCC unit. The recycle cracked stream may be recycled to a downstream hydroprocessing zone to avoid a first hydroprocessing zone for hydrotreating feed to the FCC unit. Additional recovery of cycle oil for recycle is obtained by heating slurry oil prior to vacuum separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.