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Process for the recovery of anhydrous hydrogen fluoride from aqueous solutions of fluosilicic acid and hydrogen fluoride
Process for the recovery of anhydrous hydrogen fluoride from aqueous solutions of fluosilicic acid and hydrogen fluoride
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机译:从氟硅酸和氟化氢水溶液中回收无水氟化氢的方法
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摘要
An electrodialytic distillative process for recovery of anhydrous hydrogen fluoride from an aqueous solution of fluosilicic acid and hydrogen fluoride wherein the concentration of hydrogen fluoride in said solution is such that hydrogen fluoride cannot be recovered therefrom by distillation, which comprises subjecting the solution to electrodialysis thereby increasing the total acids concentration in said solution to equal to or greater than about 46 weight percent, and thereafter recovering anhydrous hydrogen fluoride by distillation.
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