发明名称 PROCESS FOR THE SEPARATION OF NITROTOLUIC ACID ISOMERS
摘要 <p>A process for separately isolating 3-nitro-o-toluic acid and 5-nitro-o-toluic acid from a mixture of both, which comprises adding an aromatic organic base such as aniline or pyridine to the mixture to form the corresponding salts, throwing the salts into water or a solvent mixture comprising water and a water-soluble organic compound such as methanol, subjecting the resulting mixture to solid-liquid separation by utilizing the difference between the salts in the solubility in water or the solvent mixture, and recovering 3-nitro-o-toluic acid and 5-nitro-o-toluic acid from the resulting solution and solid, respectively.</p>
申请公布号 WO1998042654(P1) 申请公布日期 1998.10.01
申请号 JP1998000277 申请日期 1998.01.26
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