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Method for preparing chelates of zinc threonine

A technology of threonine zinc and chelate, which is applied in the field of preparation of threonine zinc chelate, can solve the problems of low absorption utilization rate, adverse stimulation, damage, etc., and achieve the effect of low price

Inactive Publication Date: 2008-10-22
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) Low absorption and utilization rate: Inorganic metal ions are easy to form insoluble compounds with phytic acid, phosphoric acid, oxalic acid and other molecules in food or feed in the gastrointestinal tract, which are not easily absorbed by humans and animals. Different divalent metal ions may Produce antagonism, affect its absorption in the small intestine and the utilization rate of the body, resulting in trace element deficiency in humans or animals even if added in large amounts
[0004] (2) Damage to other nutrients: free divalent metal ions can easily oxidize and inactivate certain vitamins, induce fat oxidation in food or feed to produce peroxide free radicals, and cause harm to the body, such as resulting in decreased immunity, Reduced production performance, etc.
[0005] (3) Disadvantages of excessive addition: excessive addition of inorganic minerals will cause adverse stimulation to the gastrointestinal tract of animals, promote the reproduction of harmful bacteria, and increase the incidence of digestive tract diseases
At the same time, excessive metal elements are excreted with feces, causing pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 37.5g (0.315mol) of threonine and dissolve it in 150mL of water. Then slowly add zinc chloride salt 20.4g (0.15mol) in threonine solution, the mol ratio of threonine and zinc is 2.1: 1, stir reaction at 90 ℃, while slowly adding zinc chloride salt, slowly Add sodium carbonate powder to control the pH value of the solution at 5.1. After adding the zinc chloride salt, add sodium carbonate to keep the pH value of the solution at 6.5, and continue the reaction for 0.5h. Stop the reaction, cool down, add 200mL of absolute ethanol to precipitate the threonine zinc chelate, filter, recrystallize, wash with water, vacuum dry at 50°C and 0.10MPa, and pulverize to obtain 29.5g threonine zinc chelate.

Embodiment 2

[0019] Weigh 41.1 g (0.345 mol) of threonine and dissolve it in 150 mL of water. Then slowly add zinc chloride salt 20.4g (0.15mol) in threonine solution, the mol ratio of threonine and zinc is 2.3: 1, stir reaction at 90 ℃, while slowly adding zinc chloride salt, slowly Sodium carbonate powder was added to control the pH value of the solution at 5.9. After adding the zinc chloride salt, add sodium carbonate to make the pH of the solution around 7.5, and continue the reaction for 1.0 h. Stop the reaction, cool down, add 200mL of absolute ethanol to precipitate the zinc threonine chelate, filter, recrystallize, wash with water, vacuum dry at 50°C and 0.10MPa, and pulverize to obtain 34.2g of the zinc threonine chelate.

Embodiment 3

[0021] Weigh 37.5g (0.315mol) of threonine and dissolve it in 200mL of water. Then slowly add zinc sulfate heptahydrate 43.1g (0.15mol) in threonine solution, the mol ratio of threonine and zinc sulfate is 2.1: 1, stir reaction at 85 ℃, while slowly adding zinc sulfate, Slowly add sodium carbonate powder to control the pH value of the solution at 4.2. After adding the zinc sulfate salt, add sodium carbonate to keep the pH value of the solution at 5.5, and continue the reaction for 2.5 hours. Stop the reaction, cool down, and let it stand overnight to precipitate the threonine zinc chelate, and precipitate a large amount of colorless translucent block crystals, filter, wash with water, vacuum dry at 50°C and 0.10MPa, and pulverize to obtain 43.3g threonine Zinc acid chelate.

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PUM

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Abstract

The invention relates to a preparation method of a zinc threonine chelate, which takes threonine and dissolvable zinc salt as raw materials that react in water medium. The molar ratio of the threonine to the zinc is (7.00 to 2.00) to 1 and the zinc threonine chelate is obtained by stirring the threonine and the zinc to react at the temperature of 40 DEG C to 100 DEG C. The method adopts the threonine which is cheap in market price and belongs to the essential amino acid to human bodies and animals and the dissolvable zinc salt as the raw materials to synthesize the zinc threonine chelate, and the prepared zinc threonine chelate which meets physical condition requirements not only provides enough zinc nutrition for animals but also provides the nutrition of the essential amino acid-the threonine for animals.

Description

technical field [0001] The invention relates to a preparation method of a threonine zinc chelate, in particular to a preparation method of a threonine zinc chelate prepared by reacting threonine and a soluble zinc salt. technical background [0002] At present, the trace elements added in the production of food and feed in my country are mainly inorganic metal minerals, and the main problems of inorganic trace element additives are as follows: [0003] (1) Low absorption and utilization rate: Inorganic metal ions are easy to form insoluble compounds with phytic acid, phosphoric acid, oxalic acid and other molecules in food or feed in the gastrointestinal tract, which are not easily absorbed by humans and animals. Different divalent metal ions may It produces antagonism, which affects its absorption in the small intestine and the utilization rate of the body, resulting in trace element deficiency in humans or animals even if it is added in large quantities. [0004] (2) Dama...

Claims

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Application Information

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IPC IPC(8): C07C229/76C07C229/22C07C227/14
Inventor 谢明勇胡晓波聂少平王远兴龚毅黄亚霖
Owner NANCHANG UNIV
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