Method for removing chlorine from high chlorine contained zinc sulphate solution
The technology of zinc sulfate solution and zinc chlorosulfate is applied in the chemical industry, and can solve the problems of low dechlorination rate and complicated process, and achieve the effects of high dechlorination rate, simple process flow and low cost.
Inactive Publication Date: 2019-03-01
常宁市华兴冶化实业有限责任公司
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Problems solved by technology
For example, the invention patent with the patent number 200810058431.8, the solution to be treated is electrolytic zinc neutral leaching solution, Cu 2 O feed mass ratio controls Cu + / C1 - =1.5~3, this method has the defects of cumbersome process and low dechlorination rate
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[0015] A method for removing chlorine in a high chlorine-containing zinc sulfate solution, using concentrated sulfuric acid as a reactant to remove chloride ions in the zinc sulfate solution, adding according to the weight ratio of high chlorine-containing zinc sulfate and concentrated sulfuric acid as 1:4, specifically Proceed as follows:
[0016] (1) Add the high chlorine-containing zinc sulfate solution into the reaction tank;
[0017] (2) Raise the temperature of the reaction tank to 100°C;
[0018] (3) Slowly add concentrated sulfuric acid to the reaction tank while stirring, and the time for slowly adding concentrated sulfuric acid is no less than 3 hours;
[0019] (4) The gas generated in the reaction tank is sucked by the exhaust fan, and led out to the absorption tank through the conduit, and the absorption liquid in the absorption tank is water;
[0020] (5) The reaction is carried out for 6 hours. After the reaction, the zinc sulfate solution from which chloride i...
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The invention provides a method for removing chlorine from a high chlorine contained zinc sulphate solution. A concentrated sulfuric acid is used as a reagent to remove chloride ions in the zinc sulfate solution. The method includes the following steps that (1) the high chlorine contained zinc sulphate solution is added into a reaction tank; (2) the reaction tank is heated to 100-150 DEG C; (3) the concentrated sulfuric acid is slowly added into the reaction tank while stirring; (4) gas produced in the reaction tank is drawn out into an absorption tank; and (5) after the reaction, the zinc sulfate solution with chloride ion removed is purified in the next process to produce zinc series products. According to the method for removing the chlorine from the high chlorine contained zinc sulphate solution, the technological process is simple, the dechlorination rate is high and reach 95% or above, and costs are low; and a hydrochloric acid formed in the absorption tank can be recycled for industrial production, and the economical efficiency and environmental protection are achieved.
Description
technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for removing chlorine in a high chlorine-containing zinc sulfate solution. Background technique [0002] At present, common chlorine removal processes in zinc sulfate solution are commonly used: silver chloride precipitation method, alkali neutralization zinc precipitation method and copper slag dechlorination method. Among them, the silver chloride precipitation method is to add silver salt to the zinc sulfate solution, and generate silver chloride precipitation with chloride ions in the solution, thereby removing chloride ions. This method is costly and has no production application value. Adding alkali to neutralize the zinc precipitation method is to add alkali to the zinc sulfate solution, such as sodium hydroxide, sodium carbonate, sodium bicarbonate, ammonia water, ammonium carbonate, etc., to make zinc form hydroxides or complexes, and precipitate out ...
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IPC IPC(8): C22B3/44C22B19/20
CPCC22B3/44C22B19/26Y02P10/20
Inventor 刘建华刘忠环刘松林
Owner 常宁市华兴冶化实业有限责任公司