Method for preparing threonine zinc

The technology of zinc threonine and threonine is applied in the field of preparation of amino acid chelates, which can solve the problems of long synthesis reaction time, reduced product purity, low reaction efficiency, etc., and achieves shortened production cycle, easy control of impurities, high purity effect

Active Publication Date: 2009-12-30
XINGJIA BIO ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing zinc threonine is mainly synthesized by threonine and inorganic zinc salt products, and then the finished product is obtained through processes such as crystallization, filtration separation, water washing, drying, and crushing. The process is relatively complicated, and the synthesis reaction time is also short. Longer, low reaction efficiency; during the reaction process, solid base is often added to adjust the pH value of the reaction, which may form by-products or incomplete reaction, thereby reducing the purity of the product

Method used

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  • Method for preparing threonine zinc

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Effect test

Embodiment 1

[0019] Zinc threonine is prepared through the following reaction steps: first take 24.31g threonine, put it into a reaction kettle filled with 150ml of reaction water and stir fully, then put 6.5g of zinc powder into it, and adjust the pH value of the reaction mixture at 65°C 6.8, react for 2 hours under normal pressure, then extract the reaction product with ethanol for 30 minutes, the volume ratio of ethanol and reaction product is 9:1, dry the extracted precipitate in a flash at 120°C, and grind it to obtain Zinc threonine finished product.

Embodiment 2

[0021] Zinc threonine was prepared through the following reaction steps: First, take 60g of threonine, put it into a reaction kettle filled with 400ml of reaction water and stir thoroughly, then put in 8.0g of zinc powder, and adjust the pH value of the reaction mixture to 6.7 at a temperature of 80°C , reacted for 2.5 hours under normal pressure, then extracted the reaction product with ethanol for 20 minutes, the volume ratio of ethanol to the reaction product was 6:1, flashed and dried the extracted precipitate at a temperature of 100 ° C, and prepared after crushing Get the zinc threonine finished product.

Embodiment 3

[0023] Zinc threonine is prepared by the following reaction steps: first take 44g threonine, put it into a reaction kettle filled with 250ml of reaction water and stir thoroughly, then put in 8.0g of zinc powder, and adjust the pH value of the reaction mixture to 6.4 at a temperature of 50°C , reacted for 3h under normal pressure, and then sent the reaction product to the concentration tank, at 0.25kgf / cm 2 Vacuum concentration is carried out under a certain degree of vacuum, the concentration temperature is 85°C, and the concentration time is 80 minutes. After the product is viscous, the concentrate is fed into the tray, flashed and dried at 110°C, and crushed to prepare Zinc threonine finished product.

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Abstract

The invention discloses a method for preparing threonine zinc, which is characterized by comprising the following steps: mixing zinc powder and threonine water solution in a molar ratio of the zinc powder to threonine of (0.4 to 1) to 2, reacting the mixture at the reaction temperature of between 40 and 95 DEG C, and obtaining a reaction product after the reaction is finished; and concentrating the reaction product in vacuum or extracting the reaction product by an organic solvent, and drying and crushing the reaction product to obtain a threonine zinc finished product. The method for preparing the threonine zinc has the advantages of simple process, full reaction, low cost and good product quality.

Description

technical field [0001] The invention relates to a preparation method of a feed additive, in particular to a preparation method of an amino acid chelate. Background technique [0002] Threonine is an important nutritional enhancer, which can strengthen the nutrition of grains, cakes, dairy products, etc. Threonine, like tryptophan, also has the functions of restoring human fatigue and promoting growth and development. In medicine, because the structure of threonine contains hydroxyl groups, it has a water-holding effect on human skin. After combining with oligosaccharide chains, it can play an important role in protecting cell membranes; threonine can also promote phospholipid synthesis and fatty acid oxidation in the body , and its preparation has medicinal effects such as promoting human growth and anti-fatty liver, and is often used as a component of compound amino acid infusion. At the same time, threonine is also the basic raw material for the manufacture of highly eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/76C07C229/22C07C227/18
Inventor 黄逸强
Owner XINGJIA BIO ENG CO LTD
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