Process for producing boron compounds from borate ores

Details Process for producing boron compounds from borate ores Process for producing boron compounds from borate ores

1978-07-24

1980-04-01

Peters, G. O.

Chemistry of inorganic compounds

Boron or compound thereof

Oxygen containing

423280, 423283, 2606065B, C01B 3510

Patent

active

041961773

ABSTRACT:
High purity ammonium pentaborate or boric acid is produced from alkali metal and alkaline earth metal borate ores by a relatively non-corrosive technology requiring low energy, without polluting the environment, by treating finely ground borate ores with ammonia and sulphur dioxide or ammonium sulphite in the presence of methanol. Useful by-products, such as sulphites, or fertilizers, such as ammonium phosphates, can be obtained. If the ore is rendered anhydrous prior to treatment, there is produced methylborate-ammonia adduct which upon hydrolysis is transformed into ammonium pentaborate and boric acid.

REFERENCES:
patent: 1308577 (1919-07-01), Calvert et al.
patent: 2102126 (1937-12-01), Peterson
patent: 2531182 (1950-11-01), Wiseman
patent: 2833623 (1958-05-01), May et al.
patent: 3018163 (1962-01-01), May et al.

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