Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing poly-m-phenylenediamine through oxidation of composite oxidation system

A poly-m-phenylenediamine and composite oxidation technology, which is applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem that it is difficult to effectively adjust the oxidation degree of synthetic products, affect the adsorption performance, and affect the purification Process and other issues, to achieve the effect of reducing secondary pollution and post-treatment detoxification costs, reducing process costs, and controlling the degree of oxidation

Active Publication Date: 2012-08-15
CENT SOUTH UNIV
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still relatively large deficiencies in the chemical oxidation method at present, mainly in that when a high yield is ensured, the degree of oxidation of the synthesized product is difficult to effectively adjust, which affects the improvement of its adsorption performance; The maximum yield of m-phenylenediamine can only reach about 70%; at the same time, it will decompose and produce a large amount of sulfate ions during the reaction process, which will cause secondary pollution and affect the subsequent purification process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing poly-m-phenylenediamine through oxidation of composite oxidation system
  • Method for preparing poly-m-phenylenediamine through oxidation of composite oxidation system
  • Method for preparing poly-m-phenylenediamine through oxidation of composite oxidation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 10g (0.0925mol) of m-phenylenediamine and dissolve it in 150mL of distilled water, add it into a 500mL four-necked flask, place the four-necked flask in a 45°C water bath and stir for 20min to mix the monomer solution evenly, and raise the temperature of the monomer solution to 45°C. Weigh 2.10g (0.0093mol) ammonium persulfate and dissolve it in 5.5mL distilled water, weigh 0.0233g ferrous sulfate heptahydrate and dissolve it in 84.6mL distilled water, measure 8.6mL 30% (0.0833mol) H 2 o 2 Dissolve in 34.4mL distilled water. The ammonium persulfate aqueous solution was added dropwise into the four-necked flask with a peristaltic pump, and the dropping rate was controlled at 3 mL min -1 After adding the ammonium persulfate solution in about 2 minutes, immediately pour in the ferrous sulfate aqueous solution, and then gradually add the hydrogen peroxide aqueous solution to the four-necked flask after keeping the temperature for five minutes, and the dropping rate ...

Embodiment 2

[0022] Weigh 10g (0.0925mol) of m-phenylenediamine and dissolve it in 150mL of distilled water, add it into a 500mL four-necked flask, place the four-necked flask in a 45°C water bath, stir for 20min, mix the monomer solution evenly, and make the temperature of the monomer solution Warm to 45°C. Weigh 4.20g (0.0185mol) ammonium persulfate and dissolve in 11.0mL distilled water, weigh 0.0207g ferrous sulfate heptahydrate and dissolve in 75.3ml distilled water, measure 7.6mL 30% (0.0741mol) H 2 o 2 Dissolve in 30.4mL distilled water. All the other steps are the same as in Example 1.

Embodiment 3

[0024] Weigh 10g (0.0925mol) of m-phenylenediamine and dissolve it in 150mL of distilled water, add it into a 500mL four-necked flask, place the four-necked flask in a 45°C water bath, stir for 20min, mix the monomer solution evenly, and make the temperature of the monomer solution Warm to 45°C. Weigh 6.30g (0.0278mol) ammonium persulfate and dissolve it in 16.5mL distilled water, weigh 0.0181g ferrous sulfate heptahydrate and dissolve it in 65.9mL distilled water, measure 6.6mL 30% (0.0648mol) H 2 o 2 Dissolve in 26.6mL distilled water. All the other steps are the same as in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing poly-m-phenylenediamine through oxidation of a composite oxidation system, which utilizes the novel composite oxidation system of ammonium persulfate-hydrogen peroxide to prepare and synthesize poly-m-phenylenediamine. According to the method, the technical process is simple, the productivity of poly-m-phenylenediamine is higher than that of the conventional ammonium persulfate oxidation system by more than 10%, the degree of oxidation of a polymerization product is controllable, the dosage of ammonium persulfate is reduced substantially, the synthetic cost is reduced, and generated by-products such as sulfate ions are reduced. Simultaneously, the removing effect of the synthetic product on Cr (VI) in acid waste water is outstanding, and under a normal temperature, the maximum adsorbance of the synthetic product is more than 455mg.g<-1>, and the direct removing rate of the synthetic product on the low-concentration acid waste water (less than 50mg.L<-1>) containing the Cr (VI) can reach more than 99.99%. In the absorption process, the Cr (VI) can be converted to Cr (III), and the conversion rate is close to 80%, thereby realizing the one-step adsorption detoxification of the Cr (VI).

Description

technical field [0001] The invention relates to a chemical oxidation synthesis method of poly-m-phenylenediamine in a composite oxidation system. Background technique [0002] In recent years, many scholars have paid attention to the research of conductive polyarylamine, especially polyaniline and its derivatives. As one of the main derivatives of polyaniline, poly-m-phenylenediamine has better thermal stability and solvent resistance than polyaniline. At the same time, studies have shown that poly-m-phenylenediamine can be used as a new type of efficient multifunctional adsorption material, including excellent adsorption properties for chromium ions, lead ions, mercury ions, etc. Therefore, in recent years, the synthesis and application of poly-m-phenylenediamine have attracted more and more researchers' attention. [0003] At present, the synthesis methods of poly-m-phenylenediamine are mainly divided into electrochemical method and chemical oxidation synthesis method. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02B01J20/26C02F1/28C02F101/22
Inventor 王海鹰柴立元桑培伦王云燕杨卫春唐崇俭杨志辉
Owner CENT SOUTH UNIV