An intelligent reaction kettle and a method for recycling mixed acid of hydrofluoric acid and hydrochloric acid
A reaction kettle and intelligent technology, applied in the chemical field, can solve the problems of direct discharge of acid-containing wastewater, serious environmental pollution, and inability to directly sell, and achieve the effects of continuous addition, accelerated reaction rate, and simple structure.
Active Publication Date: 2020-07-21
QUZHOU XINBU CHEM TECH CO LTD
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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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[0040] The present invention introduces an intelligent reaction kettle and a method for recycling mixed acid of hydrofluoric acid and hydrochloric acid, using poisonous heavy stone powder (barium carbonate) to react with hydrofluoric acid and hydrochloric acid in the mixed acid respectively to obtain barium fluoride products and chlorine The barium chloride aqueous solution product fully utilizes the mixed acid.
[0041] An intelligent reaction kettle includes a kettle body 1 in which a reaction layer 2 and a suction filter layer 3 are arranged. The raw materials are reacted in the reaction layer 2 and the product is suction filtered in the suction filter layer 3. The surface of the kettle body 1 is provided with a cooling water jacket 4, and a large amount of heat is generated during the reaction between the mixed acid and the poisonous heavy stone powder. Usually, cold water is continuously injected into the cooling water jacket 4 to remove a large amount of heat in the reaction...
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Abstract
The invention discloses an intelligent reactor and a method for recycling mixed acid of hydrofluoric acid and hydrochloric acid. The reactor is redesigned so that the reactor used in the invention can perfectly cooperate with the recovery and utilization of the mixed acid, saving time and effort. The recovery method of the present invention is, in the reactor that mixed acid is housed, add witherite powder (barium carbonate) continuously, control pH value and reaction terminal point, suction filtration after reaction finishes, filter residue washes and dries, obtains barium fluoride product; Filtrate After impurity removal and refining, it is a barium chloride aqueous solution product, which can be directly sold as a liquid product, or can be concentrated into a solid product for external sale. The above recycling method processes the mixed acid into two products of barium fluoride and barium chloride, so that the mixed acid can be fully utilized, turning waste into wealth without polluting the environment.
Description
Technical field [0001] The invention relates to the field of chemistry, in particular to an intelligent reaction kettle and a method for recycling mixed acids of hydrofluoric acid and hydrochloric acid. Background technique [0002] Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, a clear, colorless, smoky corrosive liquid with a strong irritating odor. Melting point -83.3℃, boiling point 112.2℃, density 0.888g / cm 3 . Easily soluble in water and ethanol, slightly soluble in ether. Because the ability of hydrogen atoms and fluorine atoms to bond is relatively strong, hydrofluoric acid cannot be completely ionized in water, so theoretically low-concentration hydrofluoric acid is a weak acid (actually a medium-strong acid according to its ionization constant). It is highly corrosive and can strongly corrode metals, glass and silicon-containing objects. Inhalation of vapor or contact with skin can cause incurable burns. Due to the ability of hydrofluoric acid ...
Claims
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IPC IPC(8): B01J8/10B01D29/03B01D29/075C01F11/22C01F11/24
CPCB01D29/03B01J8/10B01J2208/00212B01J2208/00592B01D29/075C01F11/22C01F11/24
Inventor 严招春
Owner QUZHOU XINBU CHEM TECH CO LTD