Process for preparation of naphthalene-2,6-dicarboxylic acid dialkali metal salts
US4820868A · kind A · utility
6Cited by
5References
7Claims
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Key dates
| Filing date | Sep 29, 1986 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Sep 29, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/412
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of a naphthalene-2,6-dicarboxylic acid dialkali metal salt which comprises heating an alkali metal salt of naphthoic acid and/or a dialkali metal salt of naphthalene-dicarboxylic acid under pressure with carbon dioxide gas in the presence of a catalyst, wherein an aprotic polycyclic aromatic compound having 2 or 3 rings is used as a reaction medium. Naphthalene-2,6-dicarboxylic acid dialkali metal salt can be obtained in high yield and selectivity with a good reproducibility of the reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.