Process for selective production of propylene from hydrocarbon fractions with four carbon atoms
US6743958B2 · kind B2 · utility
11Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 2001 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Nov 25, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2523/36
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
For the selective production of propylene from an olefinic C4 fraction, a process is implemented that successively comprises:1) the selective hydrogenation of butadiene with isomerization of butene-1 into butene-2;2) the separation by distillation of a mixture that is rich in isobutene and butene-1 at the top and a fraction that is rich in butene-2 at the bottom;3) the skeletal isomerization of isobutene into n-butenes on the top fraction, with recycling in stage 1; and4) the metathesis of the butene-2-rich fraction with ethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.