Integrated process for C.sub.4, C.sub.5 and C.sub.6 isomerization
US5082989A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1989 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Dec 29, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is disclosed for the isomerization of a C.sub.4 feedstock and a C.sub.5 -C.sub.6 feedstock that reduces equipment and operating expenses by utilizing a process flow scheme that provides beneficial heat integration and facilitates the use of a common recovery zone while permitting a wide variation in the relative ratio of a C.sub.4 to a C.sub.5 -C.sub.6 feedstock. The isomerization of the C.sub.4 feedstock takes place in a separate reaction zone. The effluent from the C.sub.4 isomerization zone is heat exchanged against or mixed with the C.sub.5 -C.sub.6 feedstock ahead of an additional isomerization zone that converts the C.sub.5 -C.sub.6 hydrocarbons, and if present, normal C.sub.4 hydrocarbons, to more highly branched hydrocarbons. Effluents from both isomerization zones enter a common separation section that removes light gases from the isomerate product. This invention simplifies the simultaneous isomerization of C.sub.4 and C.sub.5 -C.sub.6 feedstocks. If offers significant cost and operational advantages to newly designed units and is beneficial in the revamp of existing isomerization units to either add or improve butane isomerization capabilities. For example, but…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.