Describe the manufacturing process of potassium fertilizer.
Potassium Fertilizer
The main potassium fertilizers are potassium nitrate, potassium sulphate.
Manufacturing of potassium nitrate:
KCl and chilled 60-70% HNO3 are fed into reactor at 5-100C. Recycled brine and solvent are added to the reactor. In the presence of the solvent, the reaction goes on completion and potassium nitrate crystallizes out. Solid product separated out in decanter and dried in dryer. It can be sold in powdered and prilled form. Unreacted nitric acid and hydrochloric acid recycled and separated from the process.
Or
Manufacturing of potassium sulphate