Process for the separation and recovery of boron compounds...

Details Process for the separation and recovery of boron compounds... Process for the separation and recovery of boron compounds...

C - Chemistry, Metallurgy

10

B

23/2, 23/4

C10B 35/00 (2006.01) B01D 9/02 (2006.01) C01B 35/10 (2006.01)

Patent

CA 1301426

CASE 2426 "PROCESS FOR THE SEPARATION AND RECOVERY OF BORON COMPOUNDS FROM A GEOTHERMAL BRINE" Abstract Boron compounds are separated and recovered from a geothermal brine, which additionally contains inorganic salts, such as sodium and potassium chlorides and sulphates, by means of a process comprising the following process steps: a) pre-concentration of the geothermal brine by expansion up to room pressure, to to a pressure lower than room pressure; b) concentration of the pre-concentrated brine, coming from the (a) step, by means of an osmotic treatment against a concentrated aqueos solution of recycled inorganic salts; c) treatment of crystallization of the concentrated brine, coming from the (b) step, with the separation of the solid inorganic salts from an aqueous solution of boron compounds; d) recycle of the inorganic salts separated in the (c) step, to the (b) step of osmosis, in the form of a concentrated aqueous solution; and e) recovery of boron compounds from the relevant aqueous solution obtained in the (c) step.

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