Process for the selective conversion of naphtha to aromatics and olefins
US5292976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1993 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Apr 27, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G59/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A staged process has been discovered for the selective conversion of paraffins in naphtha to aromatics and conversion of naphthenes in naphtha to olefins. In a first stage, n-paraffins in naphtha are converted to aromatics over modified non acidic zeolite catalyst particles with a low conversion of naphthenes in the feedstream. The effluent from the first stage is cascaded to a second stage reactor containing acidic zeolite catalyst wherein naphthenes are converted to light olefins. Advantageously, the process of the invention results in a reduction in the production of light C.sub.1 -C.sub.4 paraffins compared to the prior art. The preferred catalyst for the first stage is a platinum modified zeolite containing tin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.