Multi-stage hydroprocessing with multi-stage stripping in a single stripper vessel
US5720872A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Dec 31, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G65/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for hydroprocessing liquid petroleum and chemical streams in two or more hydroprocessing stages, which stages are in separate reaction vessels and wherein each reaction stage contains a bed of hydroprocessing catalyst. The liquid product from the first reaction stage is sent to a stripping stage and stripped of H.sub.2 S, NH.sub.3 and other dissolved gases. The stripped product stream is then sent to the next downstream reaction stage, the product from which is also stripped of dissolved gases and sent to the next downstream reaction stage until the last reaction stage, the liquid product of which is stripped of dissolved gases and collected or passed on for further processing. The flow of treat gas is in a direction opposite the direction in which the reaction stages are staged for the flow of liquid. Each stripping stage is a separate stage, but all stages are contained in the same stripper vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.