Process for producing propylene
US8552240B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2006 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Nov 11, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for producing propylene from a propanol feedstock A2 by reacting the propanol feedstock A2 in a vapor phase dehydration reactor wherein the propanol is convened at a temperature comprised between 160 and 270° C. and at a pressure of above 0.1 MPa but less than 4.5 MPa, into a product stream B2 containing propylene, propyl ethers, water and unconverted and/or isomerized propanols, cooling the product stream B2, disengaging the cooled product stream B2 in a separation unit to give a first stream C2 containing propylene and propyl ethers, and a second product stream D2 containing water, propyl ethers and unconverted and/or isomerized propanols, feeding the product stream D2 to a dewatering unit wherein the water stream F2 is separated from the propyl ethers and unconverted and/or isomerised propanols stream E2, recycling the stream E2 into the dehydration reactor, cooling the product stream C2, feeding the cooled product stream C2 to a purification unit wherein the propyl ethers stream G2 is separated from the propylene stream H2, and optionally, recycling the propyl ethers stream G2 to either the dewatering unit or directly to dehydration reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.