| PATENT ASSIGNEE'S COUNTRY | UK |
| UPDATE | 06.00 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
(Alkyl)-C6H4-O-C6H4-NO2 purification from mixt contg the title compd together with > one isomers or di-nitrated analogues thereof, the process comprising - Dissolving the mixt in suitable crystallising solvent selected from aromatic hydrocarbon, haloaromatic, mixt of any of the above solvents or mixt contg an aromatic hydrocarbon with a co-solvent comprising an aliphatic hydrocarbon, ester, ether, nitrile or halohydrocarbon - Recrystallising prodt from resulting crystallisation soln Wherein the crystallisation soln contains < 25% loading of title compd & T to which soln is cooled for crystallisation is < 30C Wherein after the addition of the crystallising solvent but before recrystallization, the crystallization soln is subjected to at least one wash with an aq soln having acid pH |
| PATENT PHOTOCOPY | Available on request |
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