Oligomer production with catalytic distillation
US6025533A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1998 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Apr 10, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/129
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This process for the production of heavy oligomers by a combination of dehydrogenation and oligomerization uses a bed of saturation catalyst in a debutanizer to simplify the saturation and recycle of C.sub.4 hydrocarbons to the dehydrogenation zone. The catalytic distillation zone is located in the top of the debutanizer column and may offer further efficiency improvements to the process when used in series with a bed of alkylation or oligomerization catalyst in the distillation zone. The bed of alkylation or oligomerization catalyst reduces the quantity of C.sub.4 hydrocarbons recycled to the dehydrogenation zone by oligomerizing unconverted C.sub.4 olefins in the distillation column. Conversion of C.sub.4 olefins in the distillation column facilitates the operation of the oligomerization zone at lower conversion conditions that favor production of high octane products. The catalytic distillation arrangement is particularly beneficial in a combination for motor fuel from isoparaffins by dehydrogenation, oligomerization and saturation where the mass flow through the saturation zone is also reduced by alkylation and saturation in the distillation column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.