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Dithiocarboxylic acid-terminated polyamide-amine dendrimers, preparation method and use thereof

A dithiocarboxylic acid and amine dendritic technology, which is applied in the field of preparation of dithiocarboxylic acid-functionalized polyamide-amine dendrimers, can solve the problems of insufficient acid resistance, large dosage, and environmental pollution by fly ash. Achieve good resistance to acid and alkali impact, strong resistance to acid and alkali impact, and low dosage

Active Publication Date: 2015-11-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The object of the present invention is to provide a kind of dendritic polymer---the preparation method of the polyamide-amine of dithiocarboxylic acid termination and its application as waste incineration fly ash heavy metal stabilizer, to overcome existing inorganic stabilizer and Most of the organic stabilizers are used in a large amount and have insufficient acid resistance, so as to achieve the purpose of reducing the amount of stabilizing agents and improving the acid resistance, and achieve the purpose of controlling the cost of waste incineration fly ash stabilization treatment and reducing the pollution of the stabilized fly ash to the environment risk

Method used

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  • Dithiocarboxylic acid-terminated polyamide-amine dendrimers, preparation method and use thereof
  • Dithiocarboxylic acid-terminated polyamide-amine dendrimers, preparation method and use thereof
  • Dithiocarboxylic acid-terminated polyamide-amine dendrimers, preparation method and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Embodiment 1: Preparation of hexamethylenediamine core polyamide amine end-capped by sodium dithiocarboxylate

[0049] Slowly add 143.00 g (20%, 0.05 mol) of 0-generation polyamide amine (Hexaethylenediamine core, 0 generation, PAMAM dendrimer; The following abbreviation H-PAMAM (NH 2 ) 4 ) methanol solution, lower the temperature to 5°C, slowly add 65g NaOH (40%, 0.65 mol) aqueous solution dropwise, and control the dropping rate so that the temperature is 8 ), the yield was 90.97%.

[0050] The nuclear magnetic resonance spectrum of gained dendrimers is as follows: 13 C NMR (D 2 O): δ26.55; 28.48; 34.23; 36.53; 50.13; 53.28; 56.32; 175.89; 211.82. Its chemical formula is: (CH 2 ) 6 {N[CH 2 CH 2 CONH CH 2 CH 2 N(CSSNa) 2 ] 2} 2 .

Embodiment 2

[0051] Embodiment 2: Preparation of butanediamine core polyamide-amine end-capped by ammonium dithiocarboxylate

[0052] Slowly add 136.00 g (20%, 0.05 mol) of 0-generation polyamide-amine (Butanediamine core, 0 generation, PAMAM dendrimer ; The following abbreviation is B-PAMAM(NH 2 ) 4 ) methanol solution, cool down to 5°C, slowly add 40.93g of ammonia water (27%, 0.65 mol) dropwise, and control the dropping rate so that the temperature is 4 ) 8 ), the yield was 91.01%.

[0053] The nuclear magnetic resonance spectrum of gained dendrimers is as follows: 13 C NMR (D 2 O): δ26.98; 33.96; 35.57; 51.26; 54.32; 57.81; 176.77; 213.43. Its chemical formula is: (CH 2 ) 4 {N[CH 2 CH 2 CONH CH 2 CH 2 N(CSSNH 4 ) 2 ] 2} 2 .

Embodiment 3

[0054] Embodiment 3: Preparation of ethylenediamine core polyamide-amine end-capped by sodium dithiocarboxylate

[0055] Slowly add 129.00 g (20%, 0.05 mol) of 0-generation polyamide amine (Ethylenediamine core, 0 generation, PAMAM dendrimer; The following abbreviation E-PAMAM (NH 2 ) 4 ) methanol solution, lower the temperature to 5°C, slowly add 75.00g NaOH (40%, 0.75 mol) aqueous solution dropwise, and control the dropping rate so that the temperature is 8 ), the yield was 90.43%.

[0056] The nuclear magnetic resonance spectrum of gained dendrimers is as follows: 13 C NMR (D 2 O): δ34.02; 36.13; 50.91; 51.26; 56.54; 175.84; 212.48. Its chemical formula is: (CH 2 ) 2 {N[CH 2 CH 2 CONH CH 2 CH 2 N(CSSNa) 2 ] 2} 2 .

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Abstract

The invention relates to a dithiocarboxylic-terminated polyamidoamine dentritic polymer as well as a preparation method and use thereof. The dentritic polymer is obtained by performing dithiocarboxylic functionalization on amido-terminated polyamidoamine, and the chemical formula is (CH2)n{N[CH2CH2CONHCH2CH2N(CSSM)2]2}2, wherein n is a positive integer from 2-12, M is Na<+1>, K<+1> or NH4<+1>; the dentritic polymer can be used as a stabilizer for garbage incineration fly ash, and has an efficient stabilizing effect for heavy metal in the garbage incineration fly ash, the stabilizing treatment method is simple, the dosage is less, the cost is low and the secondary pollution is avoided; the heavy metal leaching concentration of the obtained fly ash stabilized product is less than the national rule related to hazardous wastes leaching toxicity and is good in acid resistance, the risk of polluting the environment by the stabilized product in long-term natural environment is reduced, and the obvious environment benefit and huge economic and social benefit are provided.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and environmental protection, and in particular relates to the preparation and application of a dithiocarboxylic acid functionalized polyamide-amine dendritic polymer. Background technique [0002] With the development of my country's urbanization process, the amount of urban waste removal has increased year by year. In 2012 alone, the amount of urban waste removal in my country reached 170 million tons, and the accumulated waste stockpile is huge, reaching 7 billion tons, covering an area of ​​about 80. ten thousand mu. At present, there are more than 600 cities in the country, except for county towns, 2 / 3 of the large and medium-sized cities have fallen into the predicament of "garbage siege", and 1 / 4 of the cities have no suitable places to pile up garbage. [0003] Incineration treatment has become a waste treatment technology commonly used in developed countries due to its advant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C333/16A62D3/33A62D101/08A62D101/43
Inventor 张冰如李风亭陈玲陈德珍陈轶波
Owner TONGJI UNIV