Abstract
The main objective of this work was to use the XRD-Cluster analysis associated with a 23 full factorial design of experiments to optimize the synthesis process of analcime (a zeolite used as soil conditioner) from gibbsite-kaolinite waste from bauxite beneficiation combined with the siliceous co-product of silicon metal production (amorphous silica). The variables included the NaOH solution concentration (1.5-3.5 M), temperature (110-180 ºC) and time (4-48 hours). Concentration is the most important variable and according to the clusters formed, it can be said that the optimal conditions are: NaOH solution concentration of 2.5 M; temperature of 145 ºC and time of 26 hours. Keywords: Zeolite; Principal Component Analysis (PCA); multivariate statistics.
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