| PATENT ASSIGNEE'S COUNTRY | Germany |
| UPDATE | 12.99 |
| PATENT ASSIGNEE | Bayer AG |
| PATENT CLAIMS |
- Dissolving 5-NO2-IsoPhthalic acid in mixt of 1-4C alkyl alc. & water-immiscible solvent to form reaction mixt wherein 3-8 mol of alc. is used per mole of acid - Heating mixt in presence of strong acid - Crystallizing formed acid |
| PATENT PHOTOCOPY | Available on request |
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