Description
Recrystallization is a physical process achieved depending on the fact that at various temperatures, the solubility of a mixture is different in a solvent. We often dissolve solid products separated from the organic synthesis in the solvent or melt, which contain raw materials, by-products and impurities. And then we can gain the crystallization from the solution or melt. It can separate the mixed salts and purify the impure substances, which is one of the most important and common methods of separating and purifying solid compounds. General operating procedures include selecting solvents, dissolving solids, filtering impurities under hot condition, precipitating crystal, collecting and washing crystal, and drying crystal.