Preparation of suspensions

C - Chemistry – Metallurgy – 01 – F

Patent

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Details

C01F 7/16 (2006.01) C01F 1/00 (2006.01) C01F 5/14 (2006.01) C01G 1/00 (2006.01) C01G 49/00 (2006.01) C30B 28/04 (2006.01) C30B 29/22 (2006.01) C30B 29/68 (2006.01) C30B 33/02 (2006.01)

Patent

CA 2594132

A method for preparing a suspension of LDH particles comprises the steps of preparing LDH precipitates by coprecipitation to form a mixture of LDH precipitates and solution; separating the LDH precipitates from the solution; washing the LDH precipitates to remove residual ions; mixing the LDH precipitates with water; and subjecting the mixture of LDH particles and water from step (d) to a hydrothermal treatment step by heating to a temperature of from greater than 80 ~C to 150 ~C for a period of about 1 hour to about 144 hours to form a well dispersed suspension of LDH particles in water.

L'invention porte sur un procédé de préparation d'une suspension de particules de LDH comportant les étapes suivantes: préparation de précipités de LDH par co-précipitation pour former un mélange de précipités de LDH et une solution; séparation du précipité de LDH d'avec la solution; lavage du précipité de LDH pour éliminer les ions résiduels; mélange du précipité de LDH à de l'eau; et soumission dudit mélange à un traitement hydrothermal consistant à le chauffer à une température supérieure à 80 °C à 150 °C pendant une période allant d'environ 1 heure à environ 144 heures, pour former une suspension bien dispersée de particules de LDH dans l'eau.

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