Extraction in chemistry may be a
separation technique consisting within the separation of a substance from a
matrix. It includes Liquid-liquid extraction, and Solid part extraction.
Crystallization is additionally a chemical solid–liquid separation technique,
within which heat transfer of a substance from the liquid resolution to a pure
solid crystalline part happens. In chemical engineering crystallization happens
in an exceedingly crystallizer. Sublimation is that the transition of a
substance directly from the solid to the gas part while not passing through the
intermediate liquid part. Sublimation is associate degree heat-absorbing
natural process that happens at thermal and pressures below a substance's
triple purpose in its part diagram. Distillation may be a method of separating
the part substances from a liquid mixture by selective evaporation and
condensation. Distillation might end in basically complete separation or it
should be a partial separation that will increase the concentration of trace
elements of the mixture.