In the fractionation section or palm oil, we usually add the seed crystal in raw material to accelerate the rate of crystallization, ant it should have a higher melting point than the material. There are two ways: one is add the proportional seed crystal directly into the fractionation tank mixing and then pumped into crystallizing tank to cooling crystallization; the second method is to add another good crystal in the process of crystallization. Typically, that not only can shorten about 100-300 minutes time of crystallization, but also can improve the yield of liquid oil.
The key to add the seed crystal one is the proportion between the added seed crystal and raw material. The other is the quality of seed crystal(mainly melting point).
