Patent ID: 6656439
Filing Date: 2003-12-02
Classification: B01J,C07C

Abstract:
Pillared vermiculites precalcined or not and/or trioctahedral micas obtained according to the process comprising:conditioning the micas and/or vermiculites through accelerated weathering so as to partially reduce the layer charge of the micas and/or vermiculites, wherein conditioning the micas and/or vermiculites comprises successive steps as follows: a) treating the micas and/or vermiculites with a solution of an acid; b) calcining the product recovered from step a) at about 600Â° C. for approximately 4 hours under static air; and c) treating the product from step b) with a solution of a salt of a hydrated cation until exchange is completed; and pillaring the charge-reduced micas and/or vermiculites, wherein the pillared vermiculites exhibit basal spacings above 16 Ã¥.