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

C - Chemistry, Metallurgy

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C01B 35/00 (2006.01) C01B 35/10 (2006.01) C01D 5/00 (2006.01) C05B 7/00 (2006.01)

Patent

CA 1106135

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 sul- phite 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 treat- ment, there is produced methylborate-ammonia adduct which upon hydrolysis is transformed into ammonium pentaborate and boric acid.

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