Process for the fabrication of sodium bicarbonate and boric acid

Details Process for the fabrication of sodium bicarbonate and boric acid Process for the fabrication of sodium bicarbonate and boric acid

1975-12-10

1977-05-10

Peters, G. O.

Chemistry of inorganic compounds

Boron or compound thereof

Oxygen containing

423186, 423279, 423423, C01B 3512

Patent

active

040228711

ABSTRACT:
Process for the fabrication of boric acid by carboammoniac attack of a borate mineral, involving subjecting a borosodium ore, in its natural state or previously refined, and in a finely ground condition, to a treatment in an aqueous medium with carbonic anhydride and ammonia in a manner to precipitate sodium bicarbonate which is separated. The remaining mother liquor is cooled to obtain crystals of ammonium borate which are separated, redissolved, the obtained solution being decomposed by thermal means in order to form ammonia which is recycled to the ore treatment and a boric acid solution from which the acid is separated by crystallization. This process permits obtaining two valuable products: NaHCO.sub.3 and H.sub.3 BO.sub.3. When the ore is preliminarily refined, more effective utilization can be made of the ammonia.

REFERENCES:
patent: 1510046 (1924-09-01), Dolbear
patent: 1660561 (1928-02-01), Lambert
patent: 3018163 (1962-01-01), May et al.
patent: 3112996 (1963-12-01), Garbato

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