A method for the production of hydrofluoric acid in various concentrations including anhydrous hydrofluoric acid in aqueous solutions

摘要

It produces hydrofluoric acid (HF) in various concentrations on reaction between fluorite ore (finely Ground f2ca) and sulfuric acid (9h2so4) diluted with hot water and producing HF in HF aqueous solution as it migrates from the bathroom or gas according to the concentrated ING initial diluted H2SO4 and hot.The reaction occurs in a closed reactor with internal Coating (e.g. Teflon anticorrosive Steel Mechanical agitation), and Thermal insulation.If the gas is Condensed as HF migrates as Anhu00eddro using as source Cold boiling Brine Vacuum being absorbed by Concentrated acid Vapors which, once diluted, is heated to be raw material process, but part of it can Heat Concentrated H2SO4) By mixed with hot water to take advantage of its High Heat Of dilution).The so obtained is impurificado diluted HF acid fluosilu00edcico (h2f6si) and Anhydrite (so4ca) solution (the majority OPTS).It is subjected to boiling in an Evaporator where low voltage electrical Alternating Current flows through the solution Acid Producing Vapors are Condensed u00f4de Tower parkingu00f6 (packaged) In Series, FED by cold water in a closed circuit, being the last or last irrigated by S ODE or diluted caustic Potash in Closed Circuit.The h2f6si being more volatile than the HF shows first what is a way to separate. But it can also be separated from the solution by converting the h2f6si in k2f6si immiscible reaction with HOK, K2CO3, KF or FK. HF. The Calcined Anhydrite is not decanted and becomes fraguable kneading with NaCl Brine and, even more, with cement.