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OwnerAlexandr Ilich Vulikh, Maina Konstantinovna Zagorskaya +5inventors
InventorsAlexandr Ilich Vulikh, Maina Konstantinovna Zagorskaya, Izrail Zalmanovich Kofman, Inna Vasilievna Pavlovich, Boris Veniaminovich Levitan, Nikolai Vasilievich Troyan, Sergei Viktorovich Dubyaga
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A method for purification of hydrofluoric acid from silicofluoric acid and/or sulphuric acid which comprises contacting a mixture of said acids with an anion-exchange resin in the fluoride form. As a result, a purified hydrofluoric acid is obtained. The exhausted anion-exchange resin is treated with a regenerating solution which comprises an aqueous solution of ammonium fluoride with a concentration within the range of from 2 to 10% by weight and having a pH value ranging from 6 to 9. The method according to the present invention is technologically simple; it enables the use of tightly sealed and safe equipment; requires minimal operation costs and eliminates the formation of production wastes.
A method for purification of hydrofluoric acid from acids selected from the group consisting of silicofluoric and sulphuric acids which comprises contacting a mixture of said acids with an anion-exchange resin in the fluoride form thereof to obtain a purified hydrofluoric acid;
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