Aluminum bridged clays
AssigneeRhone-Poulenc Chimie
InventorsAlain Aubry, Jean-Michel Popa
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Abstract
Novel aluminum bridged clays having an interfoliate spacing of at least 1 nm, well adapted as catalysts/catalyst supports, are prepared by (a) controlledly introducing an aqueous solution of a hydroxide base into an aqueous reaction medium containing suspended clay particulates and a dissolved aluminum salt, at a rate and for such period of time that the ratio of the concentration [C] of the base, in moles of OH.sup.- and expressed in moles/liter, to the duration (h) of introducing such OH.sup.- values, expressed in hours, is at least 0.1, and (b) recovering the reaction product bridged clay thus produced (and optionally drying/lyophilizing and/or calcining same).
Claims30
An aluminum bridged clay having an interfoliate spacing greater than 1 nm.
A process for the preparation of the bridged clay, comprising (a) introducing an aqueous solution of a hydroxide base into an aqueous reaction medium which comprises suspended clay particulates and a dissolved aluminum salt, at a rate and for such period of time that the ratio of the concentration [C] of the base, in moles of OH.sup.- and expressed in moles/liter, to the duration (h) of introducing said OH.sup.- values, expressed in hours, is at least 0.1, and (b) recovering the reaction product bridged clay thus produced.
Dependencies are inferred from the claim text.