Production of high purity butene-1 from C4 olefins/paraffins mixed gas
US9067852B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 1, 2013 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | May 8, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2259/403
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A hybrid process comprising an adsorption process and a distillation process for the separation of butene-1 from a C4 hydrocarbon mixture gas including butene-1, trans-2-butene, cis-2-butene, normal butane, isobutane, etc. is provided. The hybrid process comprises introducing a gaseous C4 mixture into the adsorption tower loaded with adsorbents which adsorb olefins selectively to discharge C4 paraffins to the outlet of the tower, desorbing C4 olefins selectively adsorbed in the adsortion tower to produce high purity C4 olefins mixture gas in which isobutane and normal butane was removed, and separating the high C4 olefins mixture gas (a mixture of butene-1, trans-2-butene, cis-2-butene, and a trace amount of C4 paraffins) via distinction to obtain high purity butene-1 including a trace amount of isobutane in the top of the distillation tower and obtain a mixture gas including trans-2-butene, cis-2-butene and a trace amount of normal butane in the bottom of the tower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.