Process for preparing 4-nitro-o-phthalic acid
US4137419A · kind A · utility
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3References
13Claims
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Key dates
| Filing date | Jul 11, 1977 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Jul 11, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2602/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for converting (1) an indene, (2) a polyindene, (3) a dihydronaphthalene or (4) a polydihydronaphthalene to 4-nitro-o-phthalic acid which involves nitrating said indene, polyindene, dihydronaphthalene or polydihydronaphthalene and then oxidizing said nitrated indene, polyindene, dihydronaphthalene or polydihydronaphthalene with nitric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.