Improvements in or relating to reducing the caking of ammonium sulphate and of salt mixtures essentially comprising the same

摘要

The caking tendency of ammonium sulphate, and of mixtures containing this sulphate as an essential constituent, is reduced by adding a water-soluble cadmium salt to the solid sulphate or to the solid mixture. Cadmium sulphate, nitrate, or chloride may be used in amount not more than 0.1, preferably 0.001-0.05 per cent. The cadmium salt may be intimately mixed with the sulphate, either by atomizing a dilute aqueous solution on to solid ammonium sulphate, or by adding the salt to a suspension of ammonium sulphate, separating the sulphate from the mother liquor, and drying.