Method for recovering a stream of C2+ hydrocarbons in a residual refinery gas and associated installation
US11629108B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2018 |
| Grant date | Apr 18, 2023 |
| Priority date | — |
| Expiry date | Apr 19, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2230/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This method comprises passing a residual stream into a flash drum to form a gaseous overhead flow and liquid bottom flow, and feeding the bottom flow into a distillation column,It comprises cooling the overhead flow in a heat exchanger to form a cooled overhead flow.It comprises the extraction of a gaseous overhead stream at the head of the distillation column, and the formation of at least one effluent stream from the overhead stream and/or from the top stream.The separation of the cooled overhead flow comprises passing the cooled overhead flow into an absorber, and injecting a methane-rich stream into the absorber to place the cooled overhead flow in contact with the methane-rich stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.