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Effect of Dry Grinding of Pyrophyllite on the Hydrothermal Synthesis of Zeolite Na X and Na A

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Figure

Table 1Chemical composition of the starting materials.
Fig. 3FT-IR spectra of the reaction products from ground pyrophyllite;(a) unground, (b) 15 min, (c) 30 min, (d) 60 min and (e) 120 min grinding.
Fig. 7XRD patterns and conversion of zeolite Na-X obtained from the120-min grinding pyrophyllite according to the reaction time; (a) 16 h,(b) 20 h, (c) 24 h and (d) 40 h.
Fig. 8XRD patterns of the reaction products from the pyrophyllite-gibbsite mixtures (Si/Al = 1.0) ground for various times; (a) unground,(b) 15 min, (c) 30 min, (d) 60 min and (e) 120 min grinding.

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