Evaporation of Ammonium Sulphate
Evaporation of Ammonium Sulphate
(OP)
We are trying to evaporate large quantities of ammonium sulphate (which is a byproduct of a pharmaceutical extraction process). The dissolved solids is supposed to be 25%. It contains 6% ammonia, 6% sulphur, 5000mg/k potassium and <10mg/kg of metals. I wonder how much i can evaporate using an industrial evaporator which can recirculate the product. The client thinks it cannot be reduced to less than 30% becuase of the "dissolved solids". But i think it is feasible, in fact down to around 5%....but am i just losing organic contaminants, ammonia, etc to the atmosphere to get a result that low??
Thanks.
Thanks.





RE: Evaporation of Ammonium Sulphate
Do you mean to evaporate water i/o to precipitate the salt crystals as a solid ?
RE: Evaporation of Ammonium Sulphate
RE: Evaporation of Ammonium Sulphate
StoneCold
RE: Evaporation of Ammonium Sulphate
Sodium sulfate starts to decompose at about 100 deg C. You should use vacuum. Besides, the dihydrate contains ~20.2 % water.
RE: Evaporation of Ammonium Sulphate
Sorry for the mixup. I should have said ammonium sulfate. The dihydrate contains somewhere above 21% water. The rest is OK.