Title:
METHOD OF SEPARATING AND COLLECTING BORON COMPOUND
Document Type and Number:
Japanese Patent JPS63170213
Kind Code:
A
Abstract:
Boron compounds are separated are 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 form 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. f
Inventors:
BITSUTOORIO BURUTSUJI
ANZERO BETSURIINI
ANZERO BETSURIINI
Application Number:
JP31914887A
Publication Date:
July 14, 1988
Filing Date:
December 18, 1987
Export Citation:
Assignee:
ENICHEM ANIC SPA
International Classes:
B01D9/00; B01D61/00; C01B35/00; C01B35/10; (IPC1-7): C01B35/10
Attorney, Agent or Firm:
Kimura Masami (1 person outside)
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