PROCESS FOR RECOVERY AND PURIFICATION OF 2- METHYLIMIDAZOLE Russian patent published in 1996 - IPC

FIELD: chemical industry. SUBSTANCE: recovery and purification of 2-methylinidazole from aqueous reaction solution resulting from synthesis of ammonia, acetaldehyde and henoxal. The process comprises saturating reaction solution with sodium chloride and cooling thereof to -5 -10 C, separating the recovered 2- methylimidazole by filtration, drying to residual moisture content of 7-15%, dissolving 2-methylhemidazole in toluene at 80-95 C, subsequently crystallizing the whole product from toluene on cooling, separating said product from mother toluene, drying and recycling said mother toluene. EFFECT: more efficient recovery and purification process. 1 tbl