Improved method for preparing low-concentration...

Details Improved method for preparing low-concentration... Improved method for preparing low-concentration...

C - Chemistry, Metallurgy

01

B

C01B 33/26 (2006.01)

Patent

CA 2293720

An improved method and apparatus for preparing low-concentration polyaluminosilicate microgels from a water soluble silicate and an alkali metal aluminate in which the silicate and the aluminate are mixed at a rate to produce a Reynolds number of at least 4000, the mixture is aged and then diluted to a silica concentration of not more than 1.0 wt.%. The method achieves reduced silica deposition during the preparation of the microgels.

La présente invention concerne un appareil et un procédé améliorés de préparation de microgels à faible teneur en polyaluminosilicates, à partir d'un silicate soluble dans l'eau et d'un aluminate métallique alcalin, dans lesquels le silicate et l'aluminate sont mélangés à un taux suffisant pour produire un nombre de Reynolds d'au moins 4000. Le mélange est vieilli, puis dilué pour obtenir teneur en silice inférieure à 1,0 % en poids. Le procédé permet de réduire un dépôt de silice pendant la préparation des microgels.

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