The preparation of nickel phosphate impregnated zeolite catalyst has been carried out with various concentrations of Zeolite-Ni(H2PO4)2, namely 2, 4, 6, 8 and 10 mEq/g. The purpose of this study was to apply the Zeolite-Ni(H2PO4)2 catalyst during the dehydration of isopropanol to diisopropyl ether and to characterize the best synthesis using XRD, SEM-EDS, and FTIR. The performance of Zeolite-Ni…