Modified kaolins

Singh, B. & Mackinnon, I.D.R. (2000) Modified kaolins. WO1997015427.

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A process for the preparation of a modified kaolin from a kaolin group mineral which includes expansion and contraction of layers of the kaolin group mineral. The layers comprising one Si-tetrahedral sheet and one Al-octahedral sheet. The expansion and contraction may be initiated by initial intercalation of a reagent which can penetrate kaolin layers to reach an interlayer region there between to form an intercalate. Subsequently, the intercalation may be followed by de-intercalation which involves the removal of the reagent. By the above process, there is provided crystalline modified kaolins having the following properties: (i) an increased interlayer space compared to corresponding kaolin group minerals; (ii) an increased susceptibility to intercalation by cations, anions or salts compared to corresponding kaolin group minerals; and (iii) an increased exfoliated morphology compared to corresponding kaolin group minerals.

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ID Code: 58354
Item Type: Patent
Refereed: No
Additional Information: PCT/AU96/00667; Filing Date: October 23rd, 1996.
WO97/15427; Pub Date: May 1st, 1997.
Australia: PN6142 October 23rd, 1995.
Additional URLs:
Patent ID: WO1997015427
Keywords: kaolinite, exfoliated layers, intercalation, divalent cations, cation exchange capacity
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > MACROMOLECULAR AND MATERIALS CHEMISTRY (030300) > Synthesis of Materials (030306)
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Mineralogy and Crystallography (040306)
Divisions: Current > Institutes > Institute for Future Environments
Deposited On: 17 Mar 2013 22:48
Last Modified: 31 Jul 2014 04:35

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