Continuous process for the production of 2,6-dimethylnaphthalene
US5004853A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1989 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Mar 27, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A continuous process is presented for the production and recovery of a high purity stream of 2,6-dimethylnaphthalene. The process comprises the general steps of: fractionating a hydrocarbon feed stream to recover a process stream rich in the various isomers of dimethylnaphthalene; subjecting the process stream rich in isomers of dimethylnaphthalene to a selective adsorption step to produce at least two streams of dimethylnaphthalene isomers, one lean in the 2,6-dimethylnaphthalene isomer and subjecting the stream of dimethylnaphthalene isomers lean in the 2,6 isomer to isomerization to increase the concentration of the 2,6 isomer of dimethylnaphthalene therein and directing the isomerized stream back to the fractionation zone to further processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.