Method for producing 2,6-DMN from mixed dimethylnaphthalenes by crystallization, adsorption and isomerization
US6057487A · kind A · utility
7Cited by
37References
36Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 30, 1997 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Dec 30, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2523/755
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is disclosed to produce 2,6-dimethylnaphthalene (2,6-DMN), used for the production of polyethylene naphthalate, at high purity and high yield from a mixture of dimethylnaphthalene isomers without limitation to the specific isomers present in the feed by a series of fractionation, crystallization and adsorption steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.