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Patent No: ZA200705227 [South Africa] Application No: 2007/05227
Title: Process for preparing amorphous silica from kimberlite tailing
Issue Date: 29-12-2010 File Date: 02-07-2007
Inventor(s): RAKSH VIR JASRA, HARESH MAHIPATLAL MODY, HARI CHAND BAJAJ, RAJESH SHANTILAL SOMANI, JATIN SHANTILAL CHUNAWALA, HEMA NARE
IPC Classification: C01B
Abstract: 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.
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Industrial Applications Chemical Techniques [Analytical Techniques] Metal Recyling [Metallurgy]