Method for preparing basic zinc chloride
A technology of zinc chloride and zinc chloride solution, applied in the direction of zinc halide, animal feed, additional food elements, etc., can solve the problems of expensive raw materials, high production cost, environmental pollution by by-products, etc. Low cost and low content of harmful impurities
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Embodiment 1
[0017] A preparation method of basic zinc chloride of the present invention, comprising the following steps: first add 100ml of water to the reaction kettle, then turn on the stirring device, drop 18.5g of zinc chloride into the reaction kettle, and then heat up to 75°C , and then slowly add 200g of zinc hydroxide slurry (120g of zinc hydroxide wet material containing 45% of zinc hydroxide is added with 80g of water and then beaten), and the pH value is 5-9. After constant temperature reaction for 1h, the material is cut Centrifuge at a centrifugal speed of 1000r / min, dry in a drying room at 85°C until the moisture content is less than 10%, pulverize and pass through a 60-mesh sieve, and finally prepare the finished product.
[0018] The crystal composition and structure of the finished product are detected by the conventional XRD detection method, and combined with the basic principle of chemical reaction, it can be determined that the finished product is basic zinc chloride. ...
Embodiment 2
[0020] A preparation method of basic zinc chloride of the present invention comprises the following steps: first add 500ml of water to the reactor, then open the stirring device, drop into the reactor 150g of zinc chloride, then heat up to 100°C, Then slowly add 1370g of zinc hydroxide slurry (with 870g of zinc hydroxide wet material containing 50% of zinc hydroxide and add 500g of water for beating), and after the constant temperature reaction for 2 hours under the condition of pH value of 5 to 9, the material is centrifuged. The centrifugal speed is 1500r / min, and it is dried in a drying room at 115°C until the moisture content is less than 10%, crushed and passed through a 60-mesh sieve, and finally the finished product of basic zinc chloride is prepared. The zinc content in the finished product is 59.12%, and the arsenic content It is 1.3ppm, and lead content is 2.5ppm, and cadmium content is 2.8ppm. The detection method of product is identical with embodiment 1.
Embodiment 3
[0022] A kind of preparation method of basic zinc chloride of the present invention, comprises the following steps: first add the water of 500Kg in the reactor, then open stirring device, drop into the zinc chloride of 150Kg in the reactor, then be heated up to 90 ℃, Then slowly add 1180Kg of zinc hydroxide slurry (made by adding 500Kg of water to 680Kg of zinc hydroxide wet material containing 50% of zinc hydroxide for beating). , with a centrifugal speed of 500r / min, put it into a drying room for drying at 95°C until the water content is less than 10%, crush it through a 60-mesh sieve, and finally prepare the finished product of basic zinc chloride. The finished product contained 58.62% zinc, 1.5ppm arsenic, 2.0ppm lead and 2.3ppm cadmium. The detection method of product is identical with embodiment 1.
[0023] The zinc hydroxide wet material in the above-mentioned each embodiment is to utilize waste zinc raw material (as industrial wastes such as sub-zinc oxide, zinc slag,...
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