Environment-friendly preparation method of basic manganese chloride

Abstract

The invention relates to the field of inorganic chemistry, in particular to an environment-friendly preparation method of basic manganese chloride, the method comprises the following steps: adding crystal manganese chloride, powdered manganese hydroxide and a catalyst into an enamel reaction kettle to obtain a precipitate; opening the enamel reaction kettle, and transferring precipitate and mother liquor to a vacuum suction filtration device for suction filtration; after suction filtration, transferring precipitates to a constant-temperature drying box to be dried, wherein the drying temperature is 50-120 DEG C, and mother liquor is pumped into an enamel reaction kettle to be recycled. The method is simple in process, short in reaction time, low in production cost and high in yield, the produced product is free of wastewater pollution discharge, the mother liquor obtained after suction filtration can be recycled, the method is suitable for industrial mass production, wastewater discharge is avoided, and the method is a green and environment-friendly basic manganese chloride synthesis method.

Description

technical field [0001] The invention relates to the field of inorganic chemistry, in particular to an environment-friendly preparation method of basic manganese chloride. Background technique [0002] Manganese is a component of various amino acid enzymes in animals, and it is also an activating factor for various enzymes in animals. The lack of manganese in animals will reduce the animal's food intake and development, which will lead to a decrease in the utilization of other components. There are many abnormal phenomena. [0003] There are two main types of manganese-containing feed additives currently in use: inorganic manganese sources and organic manganese sources. Among them, inorganic manganese mainly includes manganese oxide, manganese carbonate, manganese sulfate, manganese chloride, and powdered manganese hydroxide. In inorganic manganese, manganese sulfate and manganese chloride are water-soluble, so the bioavailability of animals is basically the same, but manga...

AI Technical Summary

Problems solved by technology

In inorganic manganese, manganese sulfate and manganese chloride are water-soluble, so the bioavailability of animals is basically the same, but manganese sulfate and manganese chloride are easy to deliquescence and agglomerate during storage, and manganese sulfate has sulfate ion The disadvantage of too high content is that excessive intake of sulfate ions by animals is not good for animal growth. Manganese oxide, as a manganese source, is absorbed in animals mainly through the action of acid in the stomach and then dissolved for gastrointestinal absorption. It is not very acidic and not easy to dissolve, so the absorption is not good and the bioavailability is low. The powdered manganese hydroxide should be better absorbed in the animal body, but because it is easily oxidized to tetravalent manganese in the air, it is not suitable for storage. Only Basic manganese chloride is stable in the air and is better absorbed in animals. Because basic manganese chloride has many advantages, many domestic and foreign feed enterprises have adopted a new type of manganese source basic manganese chloride in recent years.

[0004] Changsha Xingjia biological patent CN106865619A, using manganese and manganese chloride solution to prepare basic manganese chloride under the protection of airtight inert gas, this process will produce a large amount of alkaline waste water to pollute the environment, and at the same time, it needs inert gas protection to increase the reaction equipment Requirements, invisibly increased the production cost, at the same time after the reaction also need to add organic solvent, the addition of organic solvent is easy to catch fire in the production, which increases the danger of the production process, Wang Yunshan, Zhang Jinping and others in the Chinese Journal of Nonferrous Metals Published the method for preparing basic manganese chloride with ammonium chloride and manganese oxide, but this preparation method is the basic manganese chloride that obtains under the situation of airtight pressurization, and this technique needs pressurization because reaction, to the production The requirements for equipment are very high, and the production process has a relatively high risk, and the price of the obtained product is low. Considering the cost, it can only stay in the laboratory preparation stage or as a basic research, and is not suitable for large-scale industrial production.

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