Ethylene production with utilization of LNG refrigeration
US4121917A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1976 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Oct 6, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P30/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for utilizing liquefied natural gas as a source of refrigeration in an ethylene plant of the type featuring a "front-end" depropanizer and a forecooling recovery section, wherein the forecooling section is operated at lower than conventional temperature and pressure levels while the final separation section is maintained at conventional operating conditions. Liquefied natural gas is heat exchanged with recovered depropanizer column overhead gas in the forecooling section and with overhead of the demethanizer and C.sub.2 splitter columns to condense reflux, thereby closely matching the cooling curve of the ethylene plant with the LNG warming curve to achieve highly efficient utilization of the LNG refrigeration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.