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Current position: Home>> News Center >> recrystallization of new r & d procedure for the purification of raw materials
recrystallization of new r & d procedure for the purification of raw materials
Veröffentlicht:2015-08-13

the recrystallization to raw materials
1, learn the crystallization of solid organic compounds of theory and method.
2, master of the filtration and heat holding and chrysanthemums from filter paper method.
the principle of the
significance: the separation of reactions in the organic synthesis of solid oil products often contain unreacted starting material, by-products and impurities are cleaned, separated from the recrystallization is the pure solid compounds is an important, widely used separation technique.
principle: the use of mixtures of differences in solubility in a solvent or in a solvent with different solubility at different temperatures, they separated.
solid organic compounds in solvents, the solubility as a function of the temperature, easy to change, usually temperature, the solubility increases; on the contrary, the solubility verringert.für the first is often the case, heating the dissolved solvent dissolved when the temperature of the solution, the solubility is too saturated, crystallize. because of the compounds and impurities of different solubility of the desired substance separation and purification.
scope of application: it applies to products and impurities, large differences in the type of impurities, product less than 5% of the systems.


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