Clean and efficient synthesis using mechanochemistry
This study investigated a mechanochemical process for synthesizing slowrelease fertilizers of kaolinite and KH2PO4/(NH4)2HPO4 in separate systems by milling in a planetary ball mill. Tests with kaolinite contents ranging from 25 to 75 wt % and mill rotational speeds at 600 rpm for 2 h were performed to evaluate incorporation of KH2PO4 and (NH4)2HPO4 and release of K+,