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Water-in-water amphoteric polyacrylamide emulsion and preparation method thereof

A technology of polyacrylamide and acrylamide, which is applied in the field of water-in-water amphoteric polyacrylamide emulsion and its preparation, to achieve the effects of preventing gelation, controlling the speed of salting out, and increasing the speed of adsorption

Active Publication Date: 2018-06-01
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a water-in-water type amphoteric polyacrylamide emulsion with good dispersibility, low apparent viscosity, high dilution viscosity, high active ingredient content, fast dissolution and storage resistance and its preparation method to solve the existing problems. One or more problems in the technology

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  • Water-in-water amphoteric polyacrylamide emulsion and preparation method thereof
  • Water-in-water amphoteric polyacrylamide emulsion and preparation method thereof

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preparation example Construction

[0029] The present invention provides a kind of preparation method of water-in-water type amphoteric polyacrylamide emulsion in the first aspect, described method comprises the following steps:

[0030] (1) Acrylic acid is neutralized with sodium hydroxide to obtain a mixture containing acrylic acid and sodium acrylate;

[0031] (2) The mixture containing acrylic acid and sodium acrylate, acrylamide monomer, cationic monomer, compound dispersant composed of nonionic dispersant and amphoteric dispersant, surfactant, at least a part of inorganic salt, hydrophobic monomer Body, chelating agent and water (such as deionized water or distilled water) are mixed homogeneously to obtain a solution; and

[0032] (3) Nitrogen is passed through the solution obtained in step (2) to remove oxygen, then an initiator is added to initiate a polymerization reaction, and then aging and salting out are performed to obtain a water-in-water type amphoteric polyacrylamide emulsion.

[0033] In the pr...

Embodiment 1

[0057] ① Preparation of amphoteric dispersant: Mix 40 parts by weight of acrylamide, 160 parts by weight of acrylic acid, 25 parts by weight of dimethyl diallyl ammonium chloride, 0.35 parts by weight of sodium formate and 687 parts by weight of water to obtain a mixed solution; 88 parts by weight of sodium hydroxide to adjust the pH of the mixed solution to 6.8, and then keep it warm in a water bath at 50°C, then pass nitrogen to remove oxygen for 30 minutes, and then add 0.4 parts by weight of azobisisobutylamidine hydrochloride to initiate the polymerization reaction 2h to prepare the amphoteric dispersant P(AM-DMDAAC-AA). The rotational viscosity of the amphoteric dispersant P (AM-DMDAAC-AA) measured with a rotational viscometer at 25°C was 97500 mpa·s.

[0058] ②Preparation of water-in-water type amphoteric polyacrylamide emulsion: After neutralizing 22.5 parts by weight of acrylic acid with 10 parts by weight of sodium hydroxide to pH 5.7, mix with 150 parts by weight of...

Embodiment 2

[0060] Embodiment 2 is basically the same as Embodiment 1, the difference is:

[0061] The raw material formulations are different, as shown in Table 1;

[0062] In ②, neutralize acrylic acid to pH 5.5 with sodium hydroxide;

[0063] In ②, adjust the final pH of the resulting solution to 5.8 with sodium hydroxide;

[0064] In ②, after purging nitrogen and deoxygenating for 10 min, the initiator was added at 34°C to initiate the polymerization reaction.

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Abstract

The invention relates to a water-in-water amphoteric polyacrylamide emulsion and a preparation method thereof. The method comprises neutralizing acrylic acid with sodium hydroxide to obtain a mixturecontaining acrylic acid and sodium acrylate, uniformly mixing the mixture, an acrylamide monomer, a cationic monomer, a compound dispersing agent composed of a nonionic dispersing agent and an amphoteric dispersing agent, a surfactant, at least portion of an inorganic salt, a hydrophobic monomer, a chelating agent and water to obtain a solution, feeding nitrogen into the solution to remove oxygen,adding an initiator to initiate a polymerization reaction, and carrying out aging salting-out treatment to obtain the water-in-water amphoteric polyacrylamide emulsion. The preparation method has simple processes, utilizes easily available raw materials, realizes a low cost, needs less corollary equipment, is easy to operate in situ and has huge economic benefits. The water-in-water amphoteric polyacrylamide emulsion has the characteristics of good dispersibility, low apparent viscosity, high dilution viscosity, high content of active ingredients, dissolution fastness and resistance to storage.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a water-in-water amphoteric polyacrylamide emulsion and a preparation method thereof. Background technique [0002] Amphoteric polyacrylamide is a kind of water-soluble organic polymer. Its macromolecular chain has both positive and negative charged groups. The unique property of anti-polyelectrolyte effect makes it have a wide range of application prospects. In recent years, it has been widely used in water treatment industries such as flocculants, decolorizers for dye wastewater, sludge dehydration and metal ion chelating agents, as well as in oil field exploitation, environmental protection, papermaking, and fluid transportation. [0003] Water-in-water products have the characteristics of good dispersion, fast dissolution and low cost, and are more and more widely used. According to charge, water-in-water emulsions are divided into cationic, anionic, ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F220/34C08F226/02C08F220/14C08F2/30C08F2/26C08F2/28
CPCC08F2/26C08F2/28C08F2/30C08F220/56C08F220/06C08F220/34C08F226/02C08F220/14
Inventor 荣敏杰孙建波许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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