Process for preparing amorphous silica from kimberlite tailing

Details Process for preparing amorphous silica from kimberlite tailing Process for preparing amorphous silica from kimberlite tailing

C - Chemistry, Metallurgy

01

B

C01B 33/12 (2006.01)

Patent

CA 2592518

A new process is described for the preparation of free flowing hydrated amorphous silica from kimberlite tailing - a waste in diamond mining. The process comprises treating of kimberlite with acid, further reacting it with alkali solution to obtain soluble metal silicate solution, which is subsequently neutralized with mineral acid to polymerize silica as insoluble precipitates. The products is useful in rubber, paints as abrasive etc.

La présente invention décrit un nouveau procédé de préparation de silice amorphe hydratée à écoulement libre à partir de résidus de kimberlite - un déchet obtenu lors de l~extraction de diamants. Le procédé comprend le traitement de kimberlite avec un acide, la réaction de ce dernier avec une solution alcaline afin d~obtenir une solution de silicate de métal soluble, qui est ensuite neutralisée avec un acide minéral pour polymériser la silice sous forme d~un précipité insoluble. Le produit est utile dans le caoutchouc, les peintures comme abrasifs, etc.

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