Method and apparatus for recovering C2—C4 components in methane-containing industrial gas
US12110460B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 24, 2020 |
| Grant date | Oct 8, 2024 |
| Priority date | — |
| Expiry date | Sep 17, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2230/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for recovering C2 components in a methane-containing industrial gas includes the steps of (1) cooling a compressed methane-containing industrial gas and performing gas-liquid separation; (2) absorbing C2 components in the gas phase by using an absorbent to obtain an absorption rich liquid; (3) returning the absorption rich liquid to the compression in step (1) or mixing the absorption rich liquid with the liquid phase obtained in step (1) to obtain a mixed liquid, and depressurizing the mixed liquid or the absorption rich liquid; (4) performing methane desorption on the depressurized stream to obtain a rich absorbent, or performing second gas-liquid separation on the depressurized stream, followed by methane desorption on the second liquid phase to obtain a rich absorbent; and (5) desorbing and separating the rich absorbent to obtain a lean absorbent and an enriched gas, and recycling and reusing the lean absorbent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.