Abstract
AbstractA process for producing boric acid from ulexite and the recovery of the product by flotation is described. It was found that the degree of conversion of ulexite to boric acid decreased with rising HCl concentration. The undissolved mineral, together with other impurities such as clays, could be depressed by Quebracho, Orzan‐S, Daxad‐23 or starch, the first two being more effective. Concentrates assaying 97.1% H3BO3 were obtained without resorting to recrystallisation of the product. No flotation reagents other than the above‐mentioned were necessary for the process.
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