Preparation method of basic zinc chloride

[0019] Example 1:

[0020] A preparation method of basic zinc chloride of the present invention includes the following steps: first add 150ml of water to the reaction pot, then turn on the stirring device, put 20.8g of zinc chloride into the reaction pot, and then raise the temperature to 100°C , Then slowly add 9.4g of sodium hydroxide, react at a constant temperature under the condition of pH 5-9 for 2h, then cool down, stir and cool with cooling water, centrifuge the feed, centrifuge at 1000r/min, enter the drying room at 85℃ Drying until the water content is below 10%, crushing through a 60-mesh sieve, and finally preparing a finished product.

[0021] Through conventional XRD detection methods to detect the crystal composition and structure of the finished product, combined with the basic principles of chemical reactions, it can be determined that the finished product is basic zinc chloride. The zinc content in the finished product is 59.02%, the arsenic content is 2.1ppm, the lead content is 3.2ppm, and the cadmium content is 2.5ppm. The XRD pattern of the product is consistent with the standard pattern. The zinc content in the finished product and the content of arsenic, lead and cadmium are determined by reference Determination of basic zinc chloride according to the national standard (GB/T 22546-2008) method.

[0022] Example 2:

[0023] A preparation method of basic zinc chloride of the present invention includes the following steps: first add 300ml of water to the reaction pot, then turn on the stirring device, put 60.0g of zinc chloride into the reaction pot, and then raise the temperature to 65°C , Then slowly add 46g ammonia water containing 26% ammonia, react at a constant temperature under the condition of pH 5-9 for 1h, then lower the temperature, stir and cool with cooling water, centrifuge the feed, the centrifugal speed is 1100r/min, enter the drying room at 95 It is dried at ℃ until the water content is below 10%, crushed through a 60-mesh sieve, and finally a finished product of basic zinc chloride is prepared. The zinc content in the finished product is 58.72%, the arsenic content is 1.8 ppm, the lead content is 2.2 ppm, and the cadmium content is 2.9 ppm. The detection method of the product is the same as in Example 1.

[0024] Example 3:

[0025] A preparation method of basic zinc chloride of the present invention includes the following steps: first add 1000 kg of water to the reaction pot, then turn on the stirring device, put 280 kg of zinc chloride into the reaction pot, and then raise the temperature to 80°C, Then slowly add 215kg of ammonia water with 26% ammonia, react at a constant temperature under the condition of pH 5-9 for 1h, then lower the temperature, stir and cool with cooling water, centrifuge the feed at 500r/min, and enter the drying room at 115 It is dried at ℃ until the water content is below 10%, crushed through a 60-mesh sieve, and finally a finished product of basic zinc chloride is prepared. The zinc content in the finished product is 58.92%, the arsenic content is 1.5 ppm, the lead content is 2.0 ppm, and the cadmium content is 2.3 ppm. The detection method of the product is the same as in Example 1.