In: Other
Main points are:-
1)First step is test solubility .ie determine the slovents in which the product is soluble and insoluble
There are differenet range of solvents having different degrees of polarity (such as water, methanol, ethanol, acetone, acetonitrile, methylene chloride, ethyl ether, toluene, and pentane)
2) Layering: This consists of creating two layers of solvents, one more dense than the other. The best way is to find a solvent that the compound is soluble in that is miscible with another solvent in which the product is insoluble. The more carefully the solvents are added together, the better the chance for large crystals.This is one of the best method available now for the same.
3)Vapor diffusion :use two solvents that are miscible, one that the compound is soluble in, and one that the compound is insoluble in.
4)Slow Evaporation :-is the easiest method of recrystallization