C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 33/12 (2006.01) B09C 1/08 (2006.01) C01B 33/141 (2006.01) C09K 17/12 (2006.01)
Patent
CA 2557630
A process of preparing a biogenic silica comprising the steps of incinerating a silica bearing organic source at a temperature up to 1200~C and allowing the incinerated silica organic source to cool; adding the incinerated and cooled silica bearing organic source to an alkaline solution that has either been preheated to a temperature up to about 65~C or to be heated with the added organic source to a temperature up to about 65~C, the alkaline solution being contained in a vessel and having a pH up to 14; applying heat so that the added organic source and the alkaline solution in the vessel are at a temperature between 100~C and up to about 300~C for 1 to 4 hours, thereby forming an aqueous biogenic silica and undissolved impurities derived from the added organic source; and extracting the aqueous biogenic silica from the vessel. The extracted silica can be solidified into a solid form.
L'invention porte sur un procédé de préparation de silice biogène comporte les étapes suivantes: incinération d'une source organique siliceuse à une température atteignant 1200 ·C puis refroidissement de ladite source; adjonction de la source organique refroidie à une solution alcaline préchauffée à environ 65 ·C ou chauffée après adjonction de la source organique à 65 ·C, la solution organique, d'un pH atteignant 14, étant contenue dans un réservoir; chauffage dans le réservoir de la source organique additionnelle et de la solution alcaline; puis maintien du mélange entre environ 100 ·C et environ 300 ·C pendant 1 à 4 heures pour obtenir de la silice biogène aqueuse et des impuretés non dissoutes provenant de l'adjonction de la source organique; et extraction du réservoir de la silice biogène aqueuse qui peut être solidifiée.
Macrae & Co.
Nunn Garry Robert
LandOfFree
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