CN108840453A - Modification of chitosan water antisludging agent - Google Patents
Modification of chitosan water antisludging agent Download PDFInfo
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- CN108840453A CN108840453A CN201810691041.8A CN201810691041A CN108840453A CN 108840453 A CN108840453 A CN 108840453A CN 201810691041 A CN201810691041 A CN 201810691041A CN 108840453 A CN108840453 A CN 108840453A
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- chitosan
- oxalic acid
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- aqueous solution
- acid aqueous
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention proposes a kind of modification of chitosan water antisludging agent, including modification of chitosan, the degree of substitution of the modification of chitosan is 60~85%, and preparation method includes the following steps：1) chitosan is dissolved in oxalic acid aqueous solution, is configured to chitosan oxalic acid aqueous solution；2) by chitosan oxalic acid aqueous solution heating water bath to 60~70 DEG C, while stir process 20min~30min；3) dimethylaminoethyl acrylate is added into the chitosan oxalic acid aqueous solution of step 2), after reacting 3~6h, is cooled to room temperature to obtain reaction product；4) reaction product is recrystallized, then crystallized product is dried.The antisludging agent has good hydrolytic resistance, and dispersion performance is good, to alkaline underground heat hard water scale-inhibiting properties with higher.
Description
Technical field
The invention belongs to antisludging agent technical fields, and in particular to a kind of modification of chitosan water antisludging agent.
Background technique
Currently, the predicament that the use of conventional energy resource such as coal, oil and natural gas is faced with resource exhaustion, pollutes environment.
Geothermal energy belongs to China《Renewable Energy Law》The renewable new energy type that (2006) are included in, generally by pumping underground hot water
And utilize, it is one of energy conservation, the effective way of emission reduction.But the fouling of GEOTHERMAL WATER must face in geothermal energy application
One problem.Being handled using antisludging agent GEOTHERMAL WATER is still currently employed main means.
Natural polymer antisludging agent has the characteristics that environmental protection, can avoid the secondary pollution to water body.Wherein, chitin is only
Inferior to the second largest natural organic polymer compounds of cellulose, it is the master of the ectoskeleton of shell-fish (shrimp crab) animal, insect
Want ingredient.Chitin molecule is transformed, deacetylate obtains chitosan.The activity of chitosan has been known as compared with crust to be mentioned
It is high.Chitosan sheet contains reactive group hydroxyl and amino as linear molecule in strand, and the ortho position of amino is hydroxyl,
Can make the cage molecule that similar reticular structure is formed in chitosan molecule, therefore, chitosan can have certain absorption, complexing,
Chelating ability, therefore have certain anti-tartar effect.But chitosan is only used as wadding because its hydrolytic resistance is poor in water process at present
Solidifying agent application, chitosan is applied as antisludging agent it is still necessary to improve its hydrolytic resistance, initial phase of the technology also in research, state
Inside and outside pertinent literature is also fewer.
Summary of the invention
The present invention proposes that a kind of modification of chitosan water antisludging agent, the antisludging agent have good hydrolytic resistance, dispersion performance
It is good, to alkaline underground heat hard water scale-inhibiting properties with higher.
The technical proposal of the invention is realized in this way：
A kind of modification of chitosan water antisludging agent, including modification of chitosan, the degree of substitution of the modification of chitosan is 60~
85%, preparation method includes the following steps：
1) chitosan is dissolved in oxalic acid aqueous solution, is configured to chitosan oxalic acid aqueous solution；
2) by chitosan oxalic acid aqueous solution heating water bath to 60~70 DEG C, while stir process 20min~30min；
3) dimethylaminoethyl acrylate is added into the chitosan oxalic acid aqueous solution of step 2), it is cooling after reacting 3~6h
Reaction product is obtained to room temperature；
4) reaction product is recrystallized, then crystallized product is dried.
Preferably, the ratio between the quality and volume of the chitosan and the oxalic acid aqueous solution are 1g:100~150ml.
Preferably, the mass concentration of the oxalic acid in the oxalic acid aqueous solution is 5~10%.
Preferably, the mass ratio of the chitosan and the dimethylaminoethyl acrylate is 1:1.5~3.5.
Beneficial effects of the present invention：
Chitosan has certain absorption, complexing, chelating ability, has certain anti-tartar effect, is a kind of flocculant in itself,
When the dosage of chitosan in water is more than a certain amount of, it just shows flocculating property, makes the Ca in water2+Plasma flocculation sedimentation, table
Reveal scale inhibition performance decline state.But since its hydrolytic Resistance is poor, scale effect is restricted and is only used as wadding in water process
Solidifying agent application.Dimethylaminoethyl acrylate (DMAEA) is that a kind of widely applied quaternary ammonium acrylate and one kind possess
Multi-functional activated monomer has alkene, amine, the characteristic of ester type compound；It is mainly as high polymer coagulant and day-to-day
Learn articles (such as photocureable coating and adhesive) application.The present invention then passes through dimethylaminoethyl acrylate modification of chitosan,
Since contained amino belongs to hydrophilic class group, and alkalinity is stronger, enhances molecule chain rigidity, improves the thermostabilization of product
Property, while hydrolysis is inhibited to a certain extent, improve the stability of modification of chitosan.Add in alkaline underground heat hard water
Enter antisludging agent of the invention, scale problems can be effectively prevent by absorption, complexing, the effect of chelating.
Modification of chitosan water antisludging agent of the invention has high hydrolytic resistance, especially has height to alkaline underground heat hard water
Scale-inhibiting properties can effectively prevent the scale problems of hard water (hardness >=160mg/L), with especially effectivelying prevent acid (PH >=7)
The scale problems of hot hard water.
Specific embodiment
Embodiment 1
A kind of modification of chitosan water antisludging agent, including modification of chitosan, the degree of substitution of the modification of chitosan are 60%,
Preparation method includes the following steps：
1) chitosan is dissolved in mass concentration is to be configured to chitosan oxalic acid aqueous solution in 7% oxalic acid aqueous solution；
2) by chitosan oxalic acid aqueous solution heating water bath to 62 DEG C, while stir process 28min；
3) dimethylaminoethyl acrylate is added into the chitosan oxalic acid aqueous solution of step 2), it is cooling after reacting 3.6h
Reaction product is obtained to room temperature；
4) reaction product is recrystallized, then crystallized product is dried.
The ratio between the quality of chitosan and oxalic acid aqueous solution and volume are 1g:100ml.Chitosan and the acrylic acid diformazan ammonia
The mass ratio of base ethyl ester is 1:1.5.
The degree of substitution measurement of products obtained therefrom is carried out using photometric titration, and scale inhibition performance is measured using static scale inhibition method, detection
GEOTHERMAL WATER sample is chosen to be：Hardness >=150mg/L, the underground heat hard water of alkaline PH >=7.Scale inhibition performance is 83.4%.
Embodiment 2
A kind of modification of chitosan water antisludging agent, including modification of chitosan, the degree of substitution of the modification of chitosan are 70%,
Preparation method includes the following steps：
1) chitosan is dissolved in mass concentration is to be configured to chitosan oxalic acid aqueous solution in 5% oxalic acid aqueous solution；
2) by chitosan oxalic acid aqueous solution heating water bath to 60 DEG C, while stir process 30min；
3) dimethylaminoethyl acrylate is added into the chitosan oxalic acid aqueous solution of step 2), after reacting 6h, is cooled to
Room temperature obtains reaction product；
4) reaction product is recrystallized, then crystallized product is dried.
The ratio between the quality of chitosan and oxalic acid aqueous solution and volume are 1g:130ml.Chitosan and acrylate second
The mass ratio of ester is 1:2.2.
The degree of substitution measurement of products obtained therefrom is carried out using photometric titration, and scale inhibition performance is measured using static scale inhibition method, detection
GEOTHERMAL WATER sample is chosen to be：Hardness >=150mg/L, the underground heat hard water of alkaline PH >=7.Scale inhibition performance is 85.5%.
Embodiment 3
A kind of modification of chitosan water antisludging agent, including modification of chitosan, the degree of substitution of the modification of chitosan are 78%,
Preparation method includes the following steps：
1) chitosan is dissolved in mass concentration is to be configured to chitosan oxalic acid aqueous solution in 10% oxalic acid aqueous solution；
2) by chitosan oxalic acid aqueous solution heating water bath to 66 DEG C, while stir process 23min；
3) dimethylaminoethyl acrylate is added into the chitosan oxalic acid aqueous solution of step 2), after reacting 5h, is cooled to
Room temperature obtains reaction product；
4) reaction product is recrystallized, then crystallized product is dried.
The ratio between the quality and volume of chitosan and the oxalic acid aqueous solution are 1g:140ml.Chitosan and acrylic acid diformazan ammonia
The mass ratio of base ethyl ester is 1:2.8.
The degree of substitution measurement of products obtained therefrom is carried out using photometric titration, and scale inhibition performance is measured using static scale inhibition method, detection
GEOTHERMAL WATER sample is chosen to be：Hardness >=150mg/L, the underground heat hard water of alkaline PH >=7.Scale inhibition performance is 86.1%.
Embodiment 4
A kind of modification of chitosan water antisludging agent, including modification of chitosan, the degree of substitution of the modification of chitosan are 85%,
Preparation method includes the following steps：
1) chitosan is dissolved in mass concentration is to be configured to chitosan oxalic acid aqueous solution in 8% oxalic acid aqueous solution；
2) by chitosan oxalic acid aqueous solution heating water bath to 70 DEG C, while stir process 20min；
3) dimethylaminoethyl acrylate is added into the chitosan oxalic acid aqueous solution of step 2), after reacting 3h, is cooled to
Room temperature obtains reaction product；
4) reaction product is recrystallized, then crystallized product is dried.
The ratio between the quality of chitosan and oxalic acid aqueous solution and volume are 1g:150ml.Chitosan and acrylate second
The mass ratio of ester is 1:3.5.
The degree of substitution measurement of products obtained therefrom is carried out using photometric titration, and scale inhibition performance is measured using static scale inhibition method, detection
GEOTHERMAL WATER sample is chosen to be：Hardness >=150mg/L, the underground heat hard water of alkaline PH >=7.Scale inhibition performance is 89.3%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of modification of chitosan water antisludging agent, which is characterized in that including modification of chitosan, the degree of substitution of the modification of chitosan
It is 60~85%, preparation method includes the following steps：
1) chitosan is dissolved in oxalic acid aqueous solution, is configured to chitosan oxalic acid aqueous solution；
2) by chitosan oxalic acid aqueous solution heating water bath to 60~70 DEG C, while stir process 20min~30min；
3) dimethylaminoethyl acrylate is added into the chitosan oxalic acid aqueous solution of step 2), after reacting 3~6h, is cooled to room
Temperature obtains reaction product；
4) reaction product is recrystallized, then crystallized product is dried.
2. modification of chitosan water antisludging agent according to claim 1, which is characterized in that the chitosan and the oxalic acid water
The ratio between quality and volume of solution are 1g:100~150ml.
3. modification of chitosan water antisludging agent according to claim 2, which is characterized in that the oxalic acid in the oxalic acid aqueous solution
Mass concentration be 5~10%.
4. modification of chitosan water antisludging agent according to claim 1, which is characterized in that the chitosan and the acrylic acid
The mass ratio of dimethylaminoethyl is 1:1.5~3.5.
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| CN201810691041.8A CN108840453A (en) | 2018-06-28 | 2018-06-28 | Modification of chitosan water antisludging agent |
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| CN201810691041.8A CN108840453A (en) | 2018-06-28 | 2018-06-28 | Modification of chitosan water antisludging agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981692A (en) * | 2021-02-05 | 2021-06-18 | 魔力薇薇(上海)服饰科技有限公司 | Production process of warp-knitted spandex single-side or double-side polar fleece fabric |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384263A (en) * | 2015-12-07 | 2016-03-09 | 湖北地大热能科技有限公司 | Sulfamic acid modified chitosan water scale inhibitor and preparation method thereof |
| US20160068410A1 (en) * | 2014-11-23 | 2016-03-10 | Soheil Bahrebar | Cleaning water using chitosan |
| CN105622847A (en) * | 2016-03-21 | 2016-06-01 | 南京工业大学 | Synthesis method and application of water soluble chitosan-based flocculant |
| CN107597071A (en) * | 2017-11-10 | 2018-01-19 | 重庆大学 | A kind of preparation method of graft type chitosan magnetic adsorbent |
-
2018
- 2018-06-28 CN CN201810691041.8A patent/CN108840453A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160068410A1 (en) * | 2014-11-23 | 2016-03-10 | Soheil Bahrebar | Cleaning water using chitosan |
| CN105384263A (en) * | 2015-12-07 | 2016-03-09 | 湖北地大热能科技有限公司 | Sulfamic acid modified chitosan water scale inhibitor and preparation method thereof |
| CN105622847A (en) * | 2016-03-21 | 2016-06-01 | 南京工业大学 | Synthesis method and application of water soluble chitosan-based flocculant |
| CN107597071A (en) * | 2017-11-10 | 2018-01-19 | 重庆大学 | A kind of preparation method of graft type chitosan magnetic adsorbent |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981692A (en) * | 2021-02-05 | 2021-06-18 | 魔力薇薇(上海)服饰科技有限公司 | Production process of warp-knitted spandex single-side or double-side polar fleece fabric |
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Application publication date: 20181120 |