B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
209/3, 23/338
B01D 11/00 (2006.01) B03B 1/04 (2006.01) C01F 17/00 (2006.01) C22B 59/00 (2006.01)
Patent
CA 1105236
ABSTRACT OF THE DISCLOSURE A method for the separation of a mixture of fine particles wherein the fraction to be separated has a surface which is more reactive chemically than the remaining fractions by grinding the mixture so that the fraction to be separated has a particle size of less than 50 µ, suspending the ground mixture at a temperature less than 100°C in a diluted aqueous solution of zirconium oxychloride or zirconium oxynitrate, allowing the solution to settle and decanting the deposited material and then adding a base to the decantate to precipitate the residue therein. This process allows selective separation of the fractions having a more chemically reactive surface without the use of complex equipment and with a minimum use of expensive additives and chemicals.
305152
Marks & Clerk
Th. Goldschmidt Ag
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