Process for the production of 2,6-diisopropylnaphthalene
US4950824A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 2, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Aug 2, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of 2,6-diisopropylnaphthalene is disclosed wherein an isopropylation reaction mixture containing isopropylated naphthalenes is subjected to transalkylation with a triisopropylnaphthalene-containing mixture to obtain a mixture containing mono-, di- and tri-isopropylnaphthalenes which is then separated into a first fraction containing monisopropylnaphthalenes, a second fraction containing diisopropylnaphthalenes and a third fraction containing triisopropylnaphthalenes. The first and third fractions are recycled to the above system, while the second fraction is subjected to separation treatments for the recovery of 2,6-diisopropylnaphthalene. The second fraction from which 2,6-diisopropylnaphthalene has been removed is subjected to transalkylation with naphthalene to obtain a monoisopropylnaphthalene-rich mixture which is to be fed to the isopropylation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.