Intelligent reaction kettle and method for recycling mixed acid of hydrofluoric acid and hydrochloric acid

Abstract

The invention discloses an intelligent reaction kettle and a method for recycling mixed acid of hydrofluoric acid and hydrochloric acid. The reaction kettle is designed once again, so that the mixed acid recycling can be perfectly matched by using the reaction kettle, and time and labor can be saved. The method comprises the following steps: continuously adding barium carbonate powder into the reaction kettle filled with the mixed acid; controlling the pH value and a reaction endpoint; pumping and filtering after the reaction is completed; washing and drying the filter residues to obtain a barium fluoride product; and removing impurities of filtrate, refining to obtain a barium chloride aqueous solution product which can be used as a liquid product for direct external sale or concentrated into a solid product for external sale. By adopting the recycling product, the mixed acid is processed into barium fluoride and barium chloride products, so that the mixed acid can be completely recycled, waste can be turned into wealth, and the environment cannot be polluted.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to an intelligent reaction kettle and a method for recycling a mixed acid of hydrofluoric acid and hydrochloric acid. Background technique [0002] Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, a clear, colorless, fuming corrosive liquid with a strong pungent odor. Melting point -83.3°C, boiling point 112.2°C, density 0.888g / cm 3 . Soluble in water, ethanol, slightly soluble in ether. Because the binding ability between hydrogen atoms and fluorine atoms is relatively strong, hydrofluoric acid cannot be completely ionized in water, so theoretically low-concentration hydrofluoric acid is a weak acid (according to its ionization constant, it is actually a medium-strong acid). It is extremely corrosive and can strongly corrode metal, glass and silicon-containing objects. Inhalation of vapors or contact with skin may cause irreversible burns. Due to its ability to disso...

AI Technical Summary

Problems solved by technology

The mixed acid cannot be sold directly and needs to be processed

Most of the manufacturers currently using the mixed acid are unlicensed underground factories. These manufacturers use the mixed acid to treat the metal surface, and the acid-containing wastewater is directly discharged during the production process, which is extremely serious for environmental pollution.

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