Preparation method of stable amino acid-ferrous complex

Abstract

The invention discloses a preparation method of a stable amino acid-ferrous complex. The amino acid-ferrous complex is prepared from optimized amino acid and a ferrous salt according to a molar ratioof 1:1 in the presence of iron powder under the condition of a water system. An auxiliary agent is used to achieve the effects of regulating the pH value, digesting the iron powder, and carrying out secondary complexation or chelating on free ferrous, so that after the obtained reaction liquid is subjected to spray drying, the stable amino acid-ferrous complex is obtained. A high-level ferrous content and a low-level oxidation rate (ferric iron content) are achieved, and relatively good antioxidant capacity is achieved in a water solution, so that excellent stability is exhibited, oxidation resistance of a ferrous complex product in a storage and transportation process is improved, and efficient utilization of the ferrous product is facilitated. According to the preparation process of themethod, the steps of filtering the iron powder and digesting the iron powder by adding inorganic acid are optimized, no three wastes (waste gas, waste water and industrial residue) are generated, cleaning can be carried out continuously, and in addition, the used auxiliary agent can also provide favorable nutritional ingredients.

Description

technical field [0001] The invention belongs to the field of organic compound synthesis, and in particular relates to a preparation method of a stable ferrous amino acid complex. Background technique [0002] Ferrous iron is an essential trace element for humans and animals. It is a component of hemoglobin. If it is deficient in food or feed, it will cause iron deficiency anemia in animals. Traditionally, inorganic salts of ferrous iron are used as feed additives, which are unstable during the addition process and are easily oxidized. Animals need to pass through various biological barriers for absorption and utilization. The absorption efficiency is low, the addition amount is large, and the biological potency is low. Most of them are excreted through feces, which has the disadvantages of polluting the environment. [0003] Amino acid ferrous complexes or chelates are single five-membered ring ferrous complexes formed by ferrous ions forming coordination bonds with amino g...

AI Technical Summary

Problems solved by technology

[0011] (1) The preparation process of using water as a solvent does not consider the removal of impurity ions and dissolved oxygen in water, which increases the difficulty and workload of ferrous anti-oxidation in the subsequent preparation process

[0012] (2) There are problems in the selection or use of antioxidants, such as: the use of heterogeneous antioxidants such as hydroxylamine hydrochloride and ascorbic acid to bring into the final product affects product quality; when iron powder is used as a reducing agent, there is a need to filter out unreacted iron powder and recycle iron The iron powder is difficult to use or the iron powder is preferentially contacted with acid or stronger acid to cause consumption without actual reduction; the above problems directly affect the quality and stability of the final product

[0013] (3) The stability control of subsequent links such as storage, transportation and use of amino acid ferrous products is not considered (Chinese patent CN107118115 adds maltodextrin with 10-50% glycine weight to prevent moisture absorption during storage and transportation, but there are problems described above , and it does not help the stability when used as a feeding material)

[0014] (4) Some product preparation methods also produce salty wastewater

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