Method for preparing trace element additive basic zinc chloride
A technology of trace elements and zinc chloride, which is applied in the direction of zinc halide, additional food elements, animal feed, etc., can solve the problems of expensive raw materials and high production costs, and achieve the effect of improving purity, low production cost and low price
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Embodiment 1
[0017] Prepare basic zinc chloride by following reaction steps: get 39.5g mass concentration earlier and be the concentrated hydrochloric acid of 37%, dilute concentrated hydrochloric acid with 80ml water, then slowly drop into the hydrochloric acid after the basic zinc carbonate of 68.4g, Adjust the pH value to 6.5 at a reaction temperature of 75° C., react for 1 hour under normal pressure, and then wash with water, centrifugally separate, dry, and pulverize, and finally prepare the finished product of basic zinc chloride. The finished product has a zinc content of 58.5%. React the reaction liquid after the above centrifugation with 32.56g of zinc oxide for 1 hour under normal pressure at a reaction temperature of 95°C, and then wash with water, centrifuge, dry, and pulverize to obtain the finished product of basic zinc chloride , the zinc content in the finished product is 59.6%.
Embodiment 2
[0019] Prepare basic zinc chloride through the following reaction steps: first put 400Kg of concentrated hydrochloric acid with a mass concentration of 36.5% into the reactor that has added 1000Kg of reaction water and stir fully, then slowly drop 685Kg of basic zinc carbonate into the reactor React with diluted hydrochloric acid, adjust the pH value to 7 at a reaction temperature of 80°C, and react for 1.5 hours under normal pressure, then wash with water, centrifugally separate, dry, and pulverize, and finally prepare the finished product of basic zinc chloride 551Kg. The finished product has a zinc content of 59%. The centrifuged reaction solution reacted with 325Kg zinc oxide for 50 minutes under the normal pressure condition of 95°C, and then washed with water, centrifuged, dried and crushed to prepare 550Kg of basic zinc chloride product. The medium zinc content is 59.3%.
[0020] Because the price of basic zinc carbonate (in terms of zinc) is about 30% lower than that...
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