Recovery of hydrogen fluoride from metallic fluoride salts

Details Recovery of hydrogen fluoride from metallic fluoride salts Recovery of hydrogen fluoride from metallic fluoride salts

C - Chemistry, Metallurgy

01

B

23/180

C01B 7/19 (2006.01)

Patent

CA 1151840

ABSTRACT OF THE DISCLOSURE Anhydrous hydrogen fluoride of high purity can be recovered from metallic fluoride salts containing phosphate values by digesting the metallic salts in an aqueous solution in a humid atmosphere at a sufficiently high temperature to release a gas containing hydrogen fluoride and negligible amount of P2O5. The released gas is rectified in a rectifi- cation operation which includes a rectification zone in which the rectification occurs in the presence of sulfuric acid.

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