Zinc glycinate complex without introducing impurity ions as well as preparation method thereof

Abstract

The invention relates to a preparation method of a zinc glycinate complex without introducing impurity ions. The method comprises the following steps: adding glycine and zinc hydroxide which serve asraw materials into water to dissolve to obtain corresponding aqueous solution and turbid liquid; conveying the glycine aqueous solution and the zinc hydroxide turbid liquid into a supergravity reactoraccording to the flow speed of 1:1 to obtain first mixed liquid; adding the first mixed liquid into an enamel reaction kettle and performing indirect heating reaction to obtain an intermediate product containing white substances; and pumping the intermediate product into a plate and frame filter, performing solid and liquid separation, and drying and pulverizing the separated filter cake to obtain the zinc glycinate complex. By the method, the glycine and the zinc hydroxide serve as the raw materials, H<+> ions of carboxyl of glycine molecules and OH<-> ions in zinc hydroxide molecules are bonded to generate H2O only under the existence of the glycine and zinc ions, so that any impurity ions are not introduced in the production process and the preparation method of the zinc glycinate complex without introducing impurity ions is an environment-friendly preparation method.

Description

technical field [0001] The invention relates to the technical field of preparation of organic zinc complexes, in particular to a method for preparing zinc glycine complexes without introducing impurity ions. Background technique [0002] Zinc is one of the essential nutrients for animals to maintain life and growth, and participates in the composition and metabolism of various enzymes in the body. The development of zinc additives has gone through three stages: the first generation is inorganic salts, such as zinc sulfate and zinc oxide, and the second generation is simple organic compounds, such as zinc lactate and zinc gluconate. The above two types of products all have application defects: for example, inorganic salts not only have poor absorption and utilization rate, but most of them are excreted with feces, which is easy to cause environmental pollution; simple organic compounds also have the disadvantage of low utilization rate. The third-generation products are amin...

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Problems solved by technology

The above two types of products all have application defects: for example, inorganic salts not only have poor absorption and utilization rate, but most of them are excreted with feces, which is easy to cause environmental pollution; simple organic compounds also have the disadvantage of low utilization rate

This method needs to adjust the pH value of the solution with acid and alkali, and introduces impurity ions, such as sulfate ions and sodium ions, resulting in low product purity and sewage discharge during the production process.

[0007] CN106187796A discloses a preparation method of zinc glycine complex. The preparation method comprises the following steps: dissolving glycine and zinc sulfate heptahydrate in water, adding a small amount of iron powder and several drops of concentrated sulfuric acid, and carrying out the preparation at 70-90°C. reaction, cooling to 50-65°C for crystallization and suction filtration to obtain a crystalline solid, washing the crystalline solid several times with absolute ethanol, and drying naturally to obtain the zinc glycine complex. The product synthesized by this method contains The amount of crystal water is large, and impurity ions will also be introduced at the same time, which is easy to agglomerate, which is not conducive to production and storage

At the same time, since glycine is an organic substance, the COD and BOD content in the production wastewater drawn from these open circuits is very high, and the sewage treatment is very difficult

In addition, the preparation process is not environmentally friendly

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