发明授权
US4447615A Process for the purification of nicotinic acid amide I 失效
烟酰胺I的纯化方法

Process for the purification of nicotinic acid amide I
摘要:
Crude nicotinamide is purified by a recrystallization and in this way freed especially from nicotinic acid and salts of nicotinic acid. As solvent there is used a 2-methylpropanol-1 containing water. The recrystallization takes place at a pH between about 7 and 10.
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