CN103232569A - Amphoteric polyacrylamide aqueous dispersion and its production process - Google Patents
Amphoteric polyacrylamide aqueous dispersion and its production process Download PDFInfo
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- CN103232569A CN103232569A CN 201310110635 CN201310110635A CN103232569A CN 103232569 A CN103232569 A CN 103232569A CN 201310110635 CN201310110635 CN 201310110635 CN 201310110635 A CN201310110635 A CN 201310110635A CN 103232569 A CN103232569 A CN 103232569A
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Abstract
The invention relates to an amphoteric polyacrylamide aqueous dispersion and its production process. The production process of the amphoteric polyacrylamide aqueous dispersion takes acrylamide, acrylic acid and methacryloyloxyethyl trimethyl ammonium chloride (DMC) as main monomer raw materials, adopts an oxidant, a reducing agent and a compound of a self-made water soluble azo compound 2, 2'-azobis[2-(2-imidazoline-2-yl)propane]dihydrochloride (W-44) as an initiating system, uses a DMC homopolymer (PMDC) as a dispersant, and employs using a multi-stage water dispersion polymerization technique to form the amphoteric polyacrylamide aqueous dispersion. The aqueous dispersion has a wide application scope, an obvious effect, a simple production process, a low cost, good safety, and has no pollution.
Description
Technical field
The invention belongs to the technical field of high molecular polymer, particularly a kind of amphiprotic polyacrylamide water dispersion and production technique thereof.
Background technology
The research and development of domestic polypropylene phthalein amine product are started late, and Tianyuan Chemical Plant., Shanghai built up the first cover PAM production equipment in 1962, produced the intermediates one water-soluble PAM blob of viscose of pressed powder.Subsequently, research institute of Ji Hua company, Chinese Academy of Sciences's Guangzhou chemistry PAM product of also succeeding in developing in succession, and the operation of putting into production.After this, owing to the extensive application of PAM in the tertiary oil recovery field, and the increase of its consumption in industries such as sewage disposal, papermaking, the throughput of China PAM constantly increases.Domestic PAM manufacturer existing oneself reach several hundred families, overall throughput is about 500,000 tons/year, ultimate production is about 320,000 tons/year.But domestic PAM product forms is more single, is generally the pressed powder type; Simultaneously, domestic PAM market comsupton structure is comparatively simple, mainly concentrates on oil field, water treatment, three fields of papermaking, and wherein the consumption of PAM in oilfield exploitation accounts for 81%.
Although domestic PAM industry has bigger breakthrough in output in recent years, but remain in very big gap in state of the art, product structure and product forms, this is mainly reflected in following three aspects: the one, and production technology falls behind, processing method is still continued to use traditional aqueous solution polymerization technology, and low, the poor product quality of unit throughput.The 2nd, PAM kind is few, and all more than 1,500 ten thousand, range of molecular weight distributions is narrower usually for molecular weight, so the new polymerization process in this field has huge research and development potentiality with poly-skill (as the aqueous dispersion polymerization method).
In recent years, through domestic high molecular scholar's unremitting effort, the example that oneself has reversed-phase emulsion type PAM product short run to use in papermaking and water treatment field, but do not see aqueous dispersion type PAM product on the polymkeric substance market at home as yet.
Summary of the invention
Deficiency at prior art exists the purpose of this invention is to provide a kind of amphiprotic polyacrylamide water dispersion and production technique thereof.
The technical scheme that realizes the object of the invention is as follows: a kind of amphiprotic polyacrylamide water dispersion, formed by following component: acrylamide (AM), vinylformic acid (AA), methylacryoyloxyethyl trimethyl ammonium chloride (DMC), oxygenant, reductive agent, initiator system, dispersion agent.
The mass percent that described acrylamide, vinylformic acid and methylacryoyloxyethyl trimethyl ammonium chloride account for total component is ω (total monomer)=10.0%.
The mol ratio of described acrylamide, vinylformic acid, methylacryoyloxyethyl trimethyl ammonium chloride is n (AM): n (DMC): n (AA)=9: 0.5: 0.5.
Described initiator system is the mixture of self-control water-soluble azo compounds 2,2 '-azo two [2-(2-tetrahydroglyoxaline-2-generation) propane] dihydrochloride (W-44).
Described dispersion agent is DMC homopolymer (PMDC), relative molecular mass 30 * 10
4-46 * 10
4
The mass percent that described dispersion agent accounts for total component is ω (PDMC)=3.0%.
A kind of production technique of amphiprotic polyacrylamide water dispersion, specifically comprise the steps: in the four-hole boiling flask that prolong, thermometer, nitrogen ingress pipe and whipping appts are housed, to add according to the above ratio AM, AA, DMC, dispersion stabilizer, inorganic salt and deionized water, at room temperature stir and product is mixed and fully dissolving, stirring velocity is 75-125 r/min, regulate pH to 5.0-6.5, letting nitrogen in and deoxidizing 30 min, be warming up to 55-65 ℃, add a certain amount of initiator, reaction 8h gets water-dispersible product.
Beneficial effect of the present invention:
1, amphiprotic polyacrylamide water dispersion performance of the present invention is good, and cost is low, and it is wide to add concentration range, is fit to very much different types of, complicated trade effluent is handled, and under different kind of waste water and different pH environment, all shows good flocculating effect.
2, production technique of the present invention has adopted composite initiation system and multistage aqueous dispersion polymerization technology, key issues such as aqueous dispersion polymerization reaction system viscosity controller, different ions degree amphiprotic polyacrylamide series water dispersion is synthetic have been solved, prepare the aqueous dispersed polymer product of high reactivity thing content and high molecular weight, improved the stability in storage of product.
Description of drawings
Fig. 1 is technological process of production figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Embodiment:
A kind of production technique of amphiprotic polyacrylamide water dispersion, specifically comprise the steps: in the four-hole boiling flask that prolong, thermometer, nitrogen ingress pipe and whipping appts are housed by above-mentioned adding AM, AA, DMC, PMDC, inorganic salt and deionized water, wherein n (AM): n (DMC): n (AA) is 9: 0.5: 0.5, the mass percent that AM, AA and DMC account for total component is ω (total monomer)=10.0%, the relative molecular mass 30 * 10 of PMDC
4-46 * 10
4, the mass percent that accounts for total component is ω (PDMC)=3.0%; At room temperature stir and product is mixed and fully dissolving, stirring velocity is 75-125 r/min, regulate pH to 5.0-6.5, letting nitrogen in and deoxidizing 30 min, be warming up to 55-65 ℃, add a certain amount of self-control water-soluble azo compounds 2, the mixture of 2 '-azo two [2-(2-tetrahydroglyoxaline-2-generation) propane] dihydrochloride (W-44), reaction 8h gets water-dispersible product.
Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention also is not limited to above-mentioned giving an example; those skilled in the art; in essential scope of the present invention, the variation of making, change, interpolation or replacement all should belong to protection scope of the present invention.
Claims (7)
1. an amphiprotic polyacrylamide water dispersion is characterized in that: be made up of following component: acrylamide (AM), vinylformic acid (AA), methylacryoyloxyethyl trimethyl ammonium chloride (DMC), oxygenant, reductive agent, initiator system, dispersion agent.
2. according to claim 1 described a kind of amphiprotic polyacrylamide water dispersion, it is characterized in that: the mass percent that described acrylamide, vinylformic acid and methylacryoyloxyethyl trimethyl ammonium chloride account for total component is ω (total monomer)=10.0%.
3. according to claim 1 described a kind of amphiprotic polyacrylamide water dispersion, it is characterized in that: the mol ratio of described acrylamide, vinylformic acid, methylacryoyloxyethyl trimethyl ammonium chloride is n (AM): n (DMC): n (AA)=9: 0.5: 0.5.
4. according to claim 1 described a kind of amphiprotic polyacrylamide water dispersion, it is characterized in that: described initiator system is the mixture of self-control water-soluble azo compounds 2,2 '-azo two [2-(2-tetrahydroglyoxaline-2-generation) propane] dihydrochloride (W-44).
5. according to claim 1 described a kind of amphiprotic polyacrylamide water dispersion, it is characterized in that: described dispersion agent is DMC homopolymer (PMDC), relative molecular mass 30 * 10
4-46 * 10
4
6. according to claim 1 described a kind of amphiprotic polyacrylamide water dispersion, it is characterized in that: the mass percent that described dispersion agent accounts for total component is ω (PDMC)=3.0%.
7. the production technique of the amphiprotic polyacrylamide water dispersion of a claim 1, it is characterized in that: comprise the steps: in the four-hole boiling flask that prolong, thermometer, nitrogen ingress pipe and whipping appts are housed, to add in proportion AM, AA, DMC, dispersion stabilizer, inorganic salt and deionized water, at room temperature stir and product is mixed and fully dissolving, stirring velocity is 75-125 r/min, regulate pH to 5.0-6.5, letting nitrogen in and deoxidizing 30 min, be warming up to 55-65 ℃, add a certain amount of initiator, reaction 8h gets water-dispersible product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201310110635 CN103232569A (en) | 2013-04-01 | 2013-04-01 | Amphoteric polyacrylamide aqueous dispersion and its production process |
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| CN 201310110635 CN103232569A (en) | 2013-04-01 | 2013-04-01 | Amphoteric polyacrylamide aqueous dispersion and its production process |
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| CN103232569A true CN103232569A (en) | 2013-08-07 |
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| CN 201310110635 Pending CN103232569A (en) | 2013-04-01 | 2013-04-01 | Amphoteric polyacrylamide aqueous dispersion and its production process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104558406A (en) * | 2015-01-27 | 2015-04-29 | 江苏富淼科技股份有限公司 | Preparation method of amphoteric polyacrylamide dispersion liquid |
| CN107353760A (en) * | 2016-05-10 | 2017-11-17 | 中国科学院理化技术研究所 | Polyacrylamide coating with super-hydrophilic property and preparation method and application thereof |
-
2013
- 2013-04-01 CN CN 201310110635 patent/CN103232569A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104558406A (en) * | 2015-01-27 | 2015-04-29 | 江苏富淼科技股份有限公司 | Preparation method of amphoteric polyacrylamide dispersion liquid |
| CN104558406B (en) * | 2015-01-27 | 2017-01-25 | 江苏富淼科技股份有限公司 | Preparation method of amphoteric polyacrylamide dispersion liquid |
| CN107353760A (en) * | 2016-05-10 | 2017-11-17 | 中国科学院理化技术研究所 | Polyacrylamide coating with super-hydrophilic property and preparation method and application thereof |
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Application publication date: 20130807 |