2,3-Benzopyridine(CAS NO 91-22-5)
Other name: Quinoline
Preparation:
The refining process of crude 2,3-Benzopyridine is to pickle the wash oil fraction to obtain quinolinic acid solution, extract the neutral oil from it with a solvent to obtain pure 2,3-Benzopyridine sulfate, and then use ammonia to neutralize 2,3-Benzopyridine sulfate to obtain crude 2,3-Benzopyridine, The crude 2,3-Benzopyridine and crude 2,3-Benzopyridine are pumped to a distillation kettle for heating and distillation to obtain anhydrous crude 2,3-Benzopyridine. After cutting off the front fraction, continue distillation to obtain the main fraction with a mass fraction of 2,3-Benzopyridine ≥95%.
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