Pillared clays

Details Pillared clays Pillared clays

C - Chemistry, Metallurgy

01

B

C01B 33/26 (2006.01) B01J 20/12 (2006.01) B01J 20/16 (2006.01) C11B 3/10 (2006.01)

Patent

CA 2108779

2108779 9219533 PCTABS00017 A process for the production of an adsorbent suitable for use in the purification of edible oils such as soya oil comprising treating a layered clay mineral with a solution of a pillaring material such as a suitable aluminium cation so as to cause the adsorption of at least some of the pillaring material into the clay mineral and removing solvent to deposit pillaring material within the clay mineral, the process being characterised by the removal of at least some structural aluminium from the clay mineral by an acid treatment prior to contact with the pillaring material. The resulting pillared material, which can have a higher SiO2:Al2O3 ratio than normal as a result of the initial acid treatment can give chlorophyll adsorption capacity above 70 % and even, in some instances, up to about 99 %.

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