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Chelating agent, cleaning agent and preparation method of chelating agent

A chelating agent and compound technology, applied in the field of organic chemical synthesis, can solve the problems of low performance of IDS chelating metal, carcinogenicity and high production cost, and achieve the effects of excellent storage stability, strong chelating ability and high chelating performance.

Pending Publication Date: 2020-09-01
NANJING ALL-PLUS CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, EDTA is not easy to biodegrade (OECD), NTA has potential carcinogenicity, IDS has low performance in chelating metals, raw material toxicity is high in the production process of GLDA and MGDA, equipment requirements are high, industrialization is difficult, production costs are high, and product prices are high. Expensive, often limiting its widespread use in real life

Method used

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  • Chelating agent, cleaning agent and preparation method of chelating agent
  • Chelating agent, cleaning agent and preparation method of chelating agent
  • Chelating agent, cleaning agent and preparation method of chelating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0151] Add 196g of maleic anhydride to a 2000mL four-necked bottle, then add 200g of deionized water, and hydrolyze at 25°C for 1 hour. Then use 50% (mass fraction) NaOH solution to adjust the pH of the reaction system to 6.0-6.5, and keep the temperature not exceeding 45°C. After the dropwise addition, the temperature was raised to 55° C. and stirred for 15 minutes. Add 14g of sodium tungstate to the reaction system and stir for 45min. Add 30% hydrogen peroxide solution dropwise within 90 minutes, and add 50% NaOH to the system to adjust the pH. During the reaction, the pH is 6.0-7.5, and the temperature does not exceed 75°C. After adding hydrogen peroxide dropwise, raise the temperature to 65°C, stir for 3h, then add 266g of iminodiacetic acid, stir for 1h, add 160g of solid sodium hydroxide, then raise the temperature to 80°C, react for 5h, cool down to obtain N,N-diethylcarboxylate The solution of acid-3-hydroxydisuccinic acid tetrasodium salt, that is, the solution of ...

Embodiment 2

[0153] Add 232g of maleic acid into a 2000mL four-neck flask, then add 200g of deionized water, and stir at 45°C for 1h. Then use 50% (mass fraction) NaOH solution to adjust the pH of the reaction system to 5.0-6.5, and keep the temperature not exceeding 55°C. After the dropwise addition, the temperature was raised to 55° C. and stirred for 15 minutes. Add 16g of sodium tungstate to the reaction system and stir for 45min. Add 30% hydrogen peroxide solution dropwise within 90 minutes, and at the same time add 50% NaOH to the system to adjust the pH. During the reaction, the pH is 6.0-7.0, and the temperature does not exceed 75°C. After adding hydrogen peroxide dropwise, raise the temperature to 60-65°C, stir for 3h, then add 266g of iminodiacetic acid, stir for 1h, add 160g of solid sodium hydroxide, then raise the temperature to 90°C, react for 8h, cool down to obtain N,N-di The solution of ethyl carboxylate-3-hydroxydisuccinic acid tetrasodium salt, that is, the solution o...

Embodiment 3

[0155]Add 232g of fumaric acid into a 2000mL four-neck flask, then add 200g of deionized water, and stir at 45°C for 1h. Then use 50% (mass fraction) NaOH solution to adjust the pH of the reaction system to 5.0-6.5, and keep the temperature not exceeding 55°C. After the dropwise addition, the temperature was raised to 55° C. and stirred for 15 minutes. Add 20g of sodium tungstate to the reaction system and stir for 45min. Add 30% hydrogen peroxide solution dropwise within 90 minutes, and add 50% NaOH to the system to adjust the pH. During the reaction, the pH is 6.0-7.0, and the temperature does not exceed 75°C. After adding hydrogen peroxide dropwise, raise the temperature to 60-65°C, stir for 3h, then add 266g of iminodiacetic acid, stir for 1h, add 160g of solid sodium hydroxide, then raise the temperature to 90°C, react for 8h, cool down to obtain N,N-di The solution of ethylcarboxylate-3-hydroxydisuccinic acid tetrasodium salt, that is, the solution of the chelating ag...

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PUM

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Abstract

The invention provides a chelating agent, a cleaning agent and a preparation method of the chelating agent. The general structural formula of the chelating agent is shown in the specification. According to the general structural formula, R1, R2, R3 and R4 are alkyl; M1, M2, M3 and M4 are hydrogen atoms, metal atoms, ammonium groups or organic amine groups; A is hydroxyl or amino. The chelating agent provided by the invention has the advantages of no phosphorus and strong chelating performance.

Description

technical field [0001] The application relates to the technical field of organic chemical synthesis, in particular to a preparation method of a chelating agent, a cleaning agent and a chelating agent. Background technique [0002] At present, the common chelating agents mainly include phosphates, hydroxycarboxylic acids, aminocarboxylic acids and polymers containing carboxylic acids. The chelating effect of phosphate is better, but the phosphorus content causes great pollution to the environment. Sodium tripolyphosphate (STPP) is mainly used more, but it gradually fades out of the market amid the calls for phosphorus restriction and banning in the world. Hydroxycarboxylic acids mainly include sodium gluconate, sodium citrate, etc. Generally, the chelating performance of metal ions is poor, and the cost performance is not high. Acrylic polymers belong to polymer chelating agents. In addition to chelating ability, they also have thickening and flocculating effects. Generally,...

Claims

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Application Information

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IPC IPC(8): C07C229/24C07C227/08C07C227/18C07D301/12C07D303/48C07C51/41C07C57/145C11D3/33C11D7/32
CPCC07C229/24C07C227/08C07C227/18C07D301/12C07D303/48C07C51/412C11D3/33C11D7/3245C07C57/145
Inventor 欧敏梅龙毅
Owner NANJING ALL-PLUS CHEM CO LTD
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