Multistage indirect propylene hydration process for the production of diisopropyl ether and isopropanol
US5569789A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1995 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Aug 2, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A multistaged fixed catalyst bed process for the production of diisopropyl ether and isopropanol is disclosed comprising a fixed bed of serially connected stages containing zeolite Beta catalyst. A feedstream of propylene and water equivalents selected from the group consisting of water, isopropanol and diisopropyl ether is introduced into each stage at a rate sufficient to provide a mole ratio of water equivalents to propylene equivalents that increases in increments by stage from at least 0.1 in a first stage to at most 1.2 in a final stage. The feedstream is introduced at a temperature between 50.degree. and 450.degree. C., pressure between 700 and 24000 kPa, and weight hourly space velocity between 0.10 and 30, based on catalyst, whereby a single non-aqueous liquid phase is maintained in the fixed bed. An effluent product stream is recovered comprising diisopropyl ether, isopropanol and water from the final stage. Isopropanol is recycled to the first stage when the preferred product is diisopropyl ether. When the preferred product is isopropanol, diisopropyl ether and water are recycled to the first stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.