Preparation and Characterization of Natural Zeolite Minerals to Reduce Free Fatty Acid Levels in Used Cooking Oil

Zeolite as a catalyst can increase its activity by carrying out physical and chemical activation processes. Physical be activated reducing the size of zeolite through grinding sieving methods, from process it surface area zeolite. In this study, was chemically acid method immersing natural with HCl HF. The oxide compound in characterized using XRF. used to reduce free fatty levels variations addition 7 10 grams content acids is then compared quality requirements cooking oil according SNI 01-3741-2013. results research conducted showed that there were differences compounds before SiO2 content, namely 69.4% an 82.1% after activation. state test including properties, odor, taste tests have been purified indicate has meets based on Used normal taste, does not smell. rancid yellow. 01-3741-2013 for all highest decreasing value obtained at g 0.22%.