Patent ID: 6828370
Filing Date: 2004-12-07
Classification: B32B,C01B,C08K,Y10T

Abstract:
A process for preparing a cation-exchanged intercalate having a decreased level of extractable cations without washing excess cations from the intercalate after ion-exchange comprising the step of:containing a layered clay material with an organic cation after analysis of the clay material to determine an amount of said organic cation within the range of 0.95 and 1.05 moles of organic cation for each mole of exchangeable cations in the layered clay material, wherein the moles of exchangeable cations in the layered clay is determined empirically in order to approximate an equimolar quanity of organic cation to intercalate into the clay by titrating the clay with an organic cationic indicator that cation-exchanges with the exchangeable cations in the clay and provides an indication when all exchangeable cations have been ion-exchanged with cations from the indicator.