Stable supergallery pillared clay compositions

Claim 1

A pillared supergallery clay composition selected from the group consisting of a rectorite clay and those clays having an interstratified stacking sequence of layers selected from the group consisting of mica/smectites, illite/smectites, glauconite/smectites, chlorite/smectites, vermiculite/smectites, and kaolin/smectites containing a polymeric precursor of a metal oxide as a pillaring agent, wherein the composition has a basal spacing of 37.2 to 52 Å and an interlayer spacing of 17.6 to 32.4 Å.

Claim 9

A method for preparing a pillared clay composition which comprises: (a) preparing a Na-exchanged form of a clay selected from the group consisting of a rectorite clay and those clays having an interstratified stacking sequence of layers selected from the group consisting of mica/smectites, illite/smectites, glauconite/smectites, chlorite/smectites, vermiculite/smectites, and kaolin/smectites by an ion exchange method; (b) preparing 0.1-10% wt aqueous solution of an organic polymer containing a linkage (c) preparing an aqueous solution of a polymeric precursor of a metal oxide as a pillaring agent with a concentration of 10 to 1000 milligram-atom per liter; (d) mixing the Na-exchanged clay with the aqueous solution of the pillaring agent at a ratio of 1.0 to 10 milligram-atom of the metal per gram of clay in the presence of an aqueous solution containing 0.01-1.00 gram of the organic polymer solution of step (b) at 20°-85° C. to form a resulting mixture; (e) aging the resulting mixture at a temperature of 20°-85° C. for period of about 1 to 3 hours and holding the pH at 4 to 9 with the dropwise addition of a base to form a hydrated composition; (f) filtering and washing the hydrated composition; and (g) optionally calcinating the hydrated composition at 500°-800° C. for 2 to 17 hours and then cooling in air to form the clay composition.

Claim 10

A method for preparing a pillared clay composition which comprises: (a) preparing a Na-exchanged form of a clay selected from the group consisting of a rectorite clay and those clays having an interstratified stacking sequence of layers selected from the group consisting of mica/smectites, illite/smectites, glauconite/smectites, chlorite/smectites, vermiculite/smectites, and kaolin/smectites by an ion exchange method; (b) preparing 0.1-10% wt aqueous solution of an organic polymer containing a linkage (c) preparing an aqueous solution of a polymeric precursor of a metal oxide as a pillaring agent with a concentration of 10 to 1000 milligram-atom per liter; (d) mixing the Na-exchanged clay with the aqueous solution of the pillaring agent at a ratio of 1.0 to 10 milligram-atom of the metal per gram of clay in the presence of an aqueous solution containing 0.01-1.00 gram of the organic polymer solution of step (b) at 20°-85° C. to form a resulting mixture; (e) aging the resulting mixture at a temperature of 20°-85° C. for period of about 1 to 3 hours and holding the pH at 4 to 9 with the dropwise addition of a base to form a hydrated composition; (f) filtering and washing the hydrated composition; and (g) optionally calcinating the hydrated composition at 500°-800° C. for 2 to 17 hours and then cooling in air to form the clay composition.