Membrane-based gas separation processes to separate dehydrogenation reaction products
US9517981B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Dec 6, 2013 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Feb 6, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Gas separation processes are provided for separating dehydrogenation reaction products from a raw gas stream to recover hydrocarbons, specifically olefins, such as propylene and iso-butene, as well as unreacted feedstock. The processes employ a sequence of partial condensation steps, interspersed with membrane separation steps to raise the hydrocarbon dewpoint of the uncondensed gas, thereby avoiding the use of low-temperature or cryogenic conditions.
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