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US 6,656,439 B2Granted
Pillared trioctahedral micas and/or vermiculites
AssigneeUniversité Catholique De Louvain
InventorsGeorges Poncelet, Francisco Del Rey
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Abstract
Pillared trioctahedral micas and/or vermiculites are prepared. The process includes a conditioning operation for the partial reduction of the layer charge through an accelerated weathering process, and also includes a pillaring operation.
Claims10
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 600° 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 Å.
3 more elements
Dependencies are inferred from the claim text.