Preparation method of acrylamide/2-[(acryloyloxy)ethyl]trimethylammonium chloride copolymer

A technology of acryloyloxyethyltrimethylammonium chloride and acrylamide, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., and can solve the problem of not considering the full and effective use of ultraviolet light, not considering the uniformity of copolymerization products, and not meeting the requirements. Environmental protection and other issues, to achieve the effects of easy dissolution and application, overcoming poor heat dissipation, and easy operation and implementation

Inactive Publication Date: 2012-03-14
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of this method is complex, and the added additives and organic suspending agents are likely to cause secondary pollution during use and post-treatment, which does not meet the requirements of environmental protection.
[0003] In addition, at present, when preparing cationic polyacrylamide, only how to improve the relative molecular mass and solubility of the product is considered, but the uniformity of the composition of the copolymerized product is not considered, especially acrylamide (AM) and acryloyloxyethyl trimethyl Copolymer prepared from ammonium chloride (DAC)
In the process of photopolymerization, the full and effective use of ultraviolet light is not considered

Method used

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  • Preparation method of acrylamide/2-[(acryloyloxy)ethyl]trimethylammonium chloride copolymer
  • Preparation method of acrylamide/2-[(acryloyloxy)ethyl]trimethylammonium chloride copolymer
  • Preparation method of acrylamide/2-[(acryloyloxy)ethyl]trimethylammonium chloride copolymer

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preparation example Construction

[0017] A kind of in acrylamide and acryloyl oxyethyltrimethyl ammonium chloride aqueous solution, through photosensitizer and redox compound initiator, in light concentrating device and polycarbonate transparent reactor, adopt ultraviolet radiation to make acrylamide Copolymerize with acryloyloxyethyltrimethylammonium chloride, control the total conversion rate of monomer polymerization, and form a preparation method of acrylamide / acryloyloxyethyltrimethylammonium chloride copolymer with relatively uniform composition. Specific steps are as follows:

[0018] In the first step, take 75-95% of acrylamide monomer by mole percentage, preferably 80-90%; 25-5% of acryloyloxyethyltrimethylammonium chloride monomer, preferably 20-10%; in the reactor The mixture is mixed with deionized water to form a monomer aqueous solution with a total mass concentration of acrylamide and acryloyloxyethyltrimethylammonium chloride monomers of 20-30%, preferably 26-28%.

[0019] The second step is t...

Embodiment 1

[0031] 1. Take 56.8 parts of acrylamide monomer with a molar ratio of 80%, and 38.7 parts of acryloyloxyethyltrimethylammonium chloride monomer with a molar ratio of 20%, and mix them with 271.8 parts of deionized water in a reactor to prepare propylene The total mass concentration of the sum of amide and acryloyloxyethyltrimethylammonium chloride monomer is 26% monomer aqueous solution.

[0032] 2. Take 0.0382 parts of EDTA disodium salt complexing agent accounting for 0.04% of the total mass of monomers, and 0.0286 parts of isopropanol molecular weight regulator accounting for 0.03% of the total mass of monomers are added to the mixed monomer aqueous solution, Stir in the reaction system with nitrogen gas for 10-20 minutes, then keep the ultraviolet light intensity at 7W / m at 13°C 2 , the wavelength of ultraviolet light is 365nm, and the light is 30-40 minutes.

[0033] 3. Then add 0.02% photoinitiator 2,2'-azobisisobutylamidine dihydrochloride, 0.0191 part, 0.01% redox ini...

Embodiment 2

[0039] 1. Take 60.35 parts of acrylamide monomer with a molar ratio of 85%, take 29.03 parts of acryloyloxyethyltrimethylammonium chloride monomer with a molar ratio of 15%, and mix it with 241.7 parts of deionized water in a reactor to prepare propylene The total mass concentration of the sum of amide and acryloyloxyethyltrimethylammonium chloride monomer is 27% monomer aqueous solution.

[0040] 2. Take 0.0447 parts of EDTA disodium salt complexing agent accounting for 0.05% of the total mass of monomers, and 0.0268 parts of isopropanol molecular weight regulator accounting for 0.03% of the total mass of monomers are added to the mixed monomer aqueous solution, Stir in the reaction system with nitrogen gas for 10-20 minutes, and then keep the ultraviolet light intensity at 5W / m at 15°C 2 , the wavelength of ultraviolet light is 365nm, and the light is 30-40 minutes.

[0041] 3. Then add 0.025% photoinitiator 2,2'-azobis[2-(2-imidazoline-2-generation) propane] dihydrochlorid...

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Abstract

The invention relates to a preparation method of acrylamide / 2-[(acryloyloxy)ethyl]trimethylammonium chloride copolymer. The preparation method comprises the following steps: in an acrylamide and 2-[(acryloyloxy)ethyl]trimethylammonium chloride water solution, under the actions of photosensitizer and oxidation-reduction composite initiator, in an optical condensation device and a polycarbonate transparent reactor, enabling acrylamide and 2-[(acryloyloxy)ethyl]trimethylammonium chloride to carry out copolymerization under the radiation of ultraviolet light, thereby forming uniform acrylamide / 2-[(acryloyloxy)ethyl]trimethylammonium chloride copolymer.

Description

technical field [0001] The invention relates to a preparation method of acrylamide (AM) and acryloyloxyethyltrimethylammonium chloride (DAC) copolymer. That is, in an aqueous solution of acrylamide and acryloyloxyethyltrimethylammonium chloride, through a photosensitizer and a redox composite initiator, in a light concentrating device and a polycarbonate transparent reactor, propylene is irradiated by ultraviolet light The method for preparing an acrylamide / acryloyloxyethyltrimethylammonium chloride copolymer with a relatively uniform composition through a copolymerization reaction between amide and acryloyloxyethyltrimethylammonium chloride. technical background [0002] The copolymer formed by the copolymerization of acrylamide monomer and quaternary ammonium salt monomer with double bond has a certain positive charge, and is generally called cationic polyacrylamide. Its appearance is white granular, and it forms a colloid when dissolved in water. It is almost insoluble i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/34C08F2/50C08F4/40C02F1/56
Inventor 李万捷梁镇海刘成岑姚婷
Owner TAIYUAN UNIV OF TECH
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