Preparation method of trace element additive basic zinc sulfate
A trace element, zinc sulfate technology, applied in the direction of zinc sulfate, additional food elements, animal feed, etc., can solve the problems of high cost, high content of harmful impurities, complicated preparation process, etc., and achieves low addition level, product quality without impurities, Simple preparation process
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Embodiment 1
[0020] Prepare basic zinc sulfate by the following method steps: first take 16.05g of zinc sulfate monohydrate, dissolve it by heating with 100ml of water, then slowly put 29.11g of zinc oxide into the dissolved zinc sulfate aqueous solution, at a reaction temperature of 90°C Adjust the pH value to 6.7, react under normal pressure for 2.5 hours, wash with water, then centrifuge, dry at 95°C by airflow drying, and pulverize to obtain the finished product of basic zinc sulfate. The zinc content in the finished product was 58.2%.
Embodiment 2
[0022] Prepare basic zinc sulfate through the following reaction steps: first put 200Kg of zinc sulfate heptahydrate into the reaction kettle that has been added with 1000Kg of reaction water and stir fully, then slowly put 360Kg of zinc oxide into the reaction kettle with the dissolved zinc sulfate Carry out the reaction, adjust the pH value to 6.7 at a reaction temperature of 95°C, react for 2.5 hours under normal pressure conditions, wash with water and centrifuge, dry at 105°C with a flash drying method, pulverize, and finally prepare basic sulfuric acid Zinc finished product 620Kg. The finished product has a zinc content of 58.3%.
Embodiment 3
[0024] Biological potency evaluation and broiler chicken feeding experiment on basic zinc sulfate. Select 288 hatched AA broilers from the same batch and randomly divide them into 8 groups, with 6 replicates in each group and 6 broilers in each replicate (half male and half female). The test group used reagent grade zinc sulfate, basic zinc sulfate and zinc oxide as zinc sources, and reagent grade zinc sulfate and zinc oxide were respectively selected from two groups and the addition amount was 200 mg / kg (the addition amount in the full-price feed , the same below), 250mg / kg as controls; three groups of basic zinc sulfate were selected, and the addition amount of each group was 100mg / kg, 200mg / kg, and 250mg / kg; the control group did not add zinc source. The test results are shown in Table 1 and Table 2:
[0025] Table 1: Comparison table of relative biological potency of different zinc sources
[0026] zinc source
[0027] Table 2: Effect of adding basic zinc sulfa...
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