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Synthesis of melamine analog compounds

A compound and aminocarboxylate technology, applied in the field of aminocarboxylate compounds and their preparation, can solve the problems of low synthesis yield, toxic production raw materials, difficult conditions to control, etc., and achieve the effects of improving the preservation rate and prolonging the preservation period

Inactive Publication Date: 2007-07-11
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction is violent and the conditions are difficult to control
[0005] Existing methods for synthesizing aminocarboxyl chelating agents have shortcomings such as low synthetic yield, toxic raw materials, and difficult control of conditions

Method used

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  • Synthesis of melamine analog compounds
  • Synthesis of melamine analog compounds
  • Synthesis of melamine analog compounds

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 2,4,6-Triamino-1,3,5-triazine-N,N,N',N',N",N"-hexaacetic acid (melamine hexaacetic acid) with 41.6g of monochloroacetic acid and 160mL of distilled water Add it to a 500mL four-necked flask, and start stirring to dissolve it completely. Keep stirring, and add 23.3g of anhydrous sodium carbonate to the monochloroacetic acid solution under a circulating tap water bath. During this process, control the reaction temperature not to exceed 60°C. After adding the anhydrous sodium carbonate, continue stirring for 15 minutes and adjust the pH= 5-10. After heating the sodium chloroacetate solution to 90°C with a water bath, add 8.4g (0.067mol) of melamine into the sodium chloroacetate solution under constant stirring, and start adding sodium hydroxide solution dropwise when the pH of the system drops until the pH ≥14, when the pH of the system drops again, add sodium hydroxide solution dropwise, and repeat this until the pH does not change within 5.5 hours. The pH of the final ...

Embodiment 2

[0044] 2,4,6-Triamino-1,3,5-triazine-N-monoacetic acid

[0045] 6.33g (0.067mol) of monochloroacetic acid and 8.4g (0.067mol) of melamine were reacted according to the method of Example 1 to obtain the target product.

[0046] MS (ESP) m / z: 185 (M+1).

Embodiment 3

[0048] 2,4,6-Triamino-1,3,5-triazine-N,N (or N,N')-diacetic acid

[0049] 12.28g (0.13mol) of monochloroacetic acid and 8.4g (0.067mol) of melamine were reacted according to the method of Example 1 to obtain the target product.

[0050] MS (ESP) m / z: 243 (M+1).

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Abstract

The invention discloses a making method of melamine hexaacetate hexasodium salt with formula (I) as good chelant in the food industry, wherein R, B, Y, m, n and p are designed as instruction; the compound can lengthen the reserving period, which can replace EDTA completely.

Description

technical field [0001] The invention belongs to the field of organic chemistry, and relates to an aminocarboxyl compound and a preparation method thereof. Aminocarboxyl compound is a kind of aminocarboxyl chelating agent, which can have up to 12 active coordination atoms. The chelate formed when chelating metal ions is particularly stable, and can be widely used as an intermediate in chemical reactions. Background technique [0002] In recent years, with the increasing development of science and technology and the increasing awareness of environmental protection, aminocarboxyl compounds have been widely used in wastewater treatment, analytical chemistry, papermaking chemicals, textile chemicals and other fields. Aminocarboxyl compounds are a large class of organic compounds containing N and O atoms. These compounds are metal ion chelating agents with strong coordination ability, and they can form stable complexes with almost all metal ions. [0003] In 1977, U.S. Patent No....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/70A23L1/03A23L3/3544A23L29/00
Inventor 段洪东王晓滨秦大伟宋永胜李树英
Owner QILU UNIV OF TECH