Method and device for reducing heavy polycyclic aromatic compounds in hydrocracking units
US10533142B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2015 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Jan 18, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/4081
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a process and a facility for reducing the concentration of heavy polycyclic aromatic compounds (HPNA) in the recycle loop of hydrocracking units, which comprises a fractionation column. In accordance with this process, a portion of the stream present at the level of at least one plate (I) which is the supply plate or a plate located between the supply plate and the residue evacuation point, or if stripping gas is injected, between the supply plate and the stripping gas injection point, is withdrawn from the fractionation column. A portion, preferably all, of the withdrawn stream is recycled to the hydrocracking step directly or after optional separation of the gases. The residue is purged in its entirety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.