Cryogenic separation of gaseous mixtures
US5035732A · kind A · utility
36Cited by
27References
44Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 4, 1990 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Jan 4, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A cryogenic technique for recovering ethene from a gaseous mixture containing methane, ethane, etc. Operating methods and apparatus are provided for passing the gas feed through a chilling train having a series of dephlegmator-type exchange units to condense liquid rich in ethene and ethane, while separating a major portion of methane and lighter gas. A multizone demethanizer removes condensed methane from the C.sub.2 fraction to provide multiple methane free liquid streams of varying ethene to ethane ratio at least one of which is essentially C.sub.3 free.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.