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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

Active Publication Date: 2010-05-12
XINGJIA BIO ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current production and preparation process of basic zinc chloride, it can be produced by using waste zinc, by reacting zinc chloride and zinc oxide, or by reacting hydrochloric acid and zinc oxide or by reacting hydrochloric acid and basic zinc carbonate. Yes, in these preparation methods, the production cost of some methods is too high, the price of raw materials used in some methods is relatively expensive, and the by-products obtained in some preparation methods are likely to cause environmental pollution, and there are certain limitations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention discloses a method for preparing basic zinc chloride, which comprises the following steps: adding zinc hydroxide slurry into zinc chloride solution in a molar ratio of the zinc hydroxide to the zinc chloride being 3-4.5:1 to perform reaction at the temperature between 70 and 105DEG C and a pH value between 5 and 9, and obtaining a reaction product after the reaction; washing the reaction product with water, and centrifuging and drying the reaction product to obtain the basic zinc chloride. The preparation method has sample and safe operation, low waste emission and low production cost; and the product has better quality.

Description

technical field [0001] The invention relates to a preparation method of a zinc compound, in particular to a preparation method of a zinc halide. Background technique [0002] As a new zinc source feed additive, basic zinc chloride has low addition level, less dosage, good palatability, high biological potency and feeding effect compared with conventional zinc sources such as zinc oxide and zinc sulfate. It is a new type of feed additive that is safe, efficient, environmentally friendly and has comprehensive effects. In the current production and preparation process of basic zinc chloride, it can be produced by using waste zinc, by reacting zinc chloride and zinc oxide, or by reacting hydrochloric acid and zinc oxide or by reacting hydrochloric acid and basic zinc carbonate. Yes, among these preparation methods, the production cost of some methods is too high, the raw materials used in some methods are relatively expensive, and the by-products obtained in some preparation me...

Claims

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Application Information

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IPC IPC(8): C01G9/04A23K1/175A23K20/20A23K50/30
Inventor 黄逸强
Owner XINGJIA BIO ENG CO LTD
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