CN103524672A - Method for preparing cationic flocculant - Google Patents
Method for preparing cationic flocculant Download PDFInfo
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- CN103524672A CN103524672A CN201310461057.7A CN201310461057A CN103524672A CN 103524672 A CN103524672 A CN 103524672A CN 201310461057 A CN201310461057 A CN 201310461057A CN 103524672 A CN103524672 A CN 103524672A
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Abstract
The invention discloses a method for preparing a cationic flocculant. The method comprises the following steps: mixing a mixed monomer, a dispersing agent, a reducing agent, a water soluble crosslinking agent and an initiator, carrying out a reaction at a temperature of 70 to 80 DEG C for 1 to 2 hours, to obtain the cationic flocculant. The mixed monomer is composed of the following components in parts by weight: 60 to 70 parts of a non-ionic monomer, and 30 to 40 parts of a cationic monomer; the non-ionic monomer is prepared by compounding acrylamide and methyl acrylamide according to the weight ratio of 1:5 to 1:7; the cationic monomer is prepared by compounding acryloxyethyltrimethyl ammonium chloride and diethyl diallyl ammonium chloride according to the ratio of 1:2 to 1:3. The method adopts a water medium dispersion polymerization method, simplifies the production process, reduces production costs, improves the product quality, and reduces environmental pollution.
Description
Technical field
The present invention relates to a kind of preparation method of cationic flocculant.
Background technology
Water treatment flocculation technique, refers to and in waste water, adds flocculation agent, and the colloid in water body, suspension solid-liquid and dissolved organic matter by physics chemical action, and are removed to COD wherein, colourity, suspensoid etc., and the water quality of waste water is purified.Using is at present polymerize aluminum chloride comparatively widely, and shortcoming mainly contains that dosage is large, flco volume is large, sedimentation speed slow, dehydration difficulty, efficiency is low, processing costs is high.
In recent years, organic polymer coargulator development rapidly, has wide in varietyly, and consumption is few, and raw slag is few, is easy to solid-liquid separation and reduces the advantages such as equipment corrosion, in water treatment field, occupies more and more consequence.As CN1247838A has disclosed a kind of cationic high-molecular flocculant, it is that to adopt polyacrylamide, formaldehyde, dimethylamine be main raw, hereby reacts the colloid of the amine methyl polyacrylamide obtaining by Manny.There is the shortcomings such as technological process flocculation agent effective content loaded down with trivial details and that obtain is low in the method.Chinese patent CN1336391A has disclosed a kind of cationic flocculant, and it is that to adopt inorganic ammonium salt, alkanoic, Dicyanodiamide be main raw, through polycondensation, obtains.The flocculating agent molecule amount that the method obtains is lower, and flocculation bridge formation ability etc. is determined.
Summary of the invention
The preparation method who the object of this invention is to provide a kind of cationic flocculant, the above-mentioned defect existing to overcome prior art.
For solving the problems of the technologies described above, the preparation method of cationic flocculant of the present invention, comprise the steps: mix monomer, dispersion agent, reductive agent, water-soluble cross-linker and initiator to mix, at 70-80 ℃, react 1-2 hour, obtain described cationic flocculant; Described mix monomer is comprised of the component of following weight part: non-ionic monomer 60-70 part, cationic monomer 30-40 part; Described non-ionic monomer is that acrylamide and Methacrylamide form by weight 1:5-1:7 is composite; Described cationic monomer is that acrylyl oxy-ethyl-trimethyl salmiac and diallyl diethyl ammonium chloride form by 1:2-1:3 is composite.
In technique scheme, in mix monomer 100 weight parts, each composition weight umber is as follows:
Described dispersion agent is polyoxyethylene glycol or polyoxyethylene, and weight-average molecular weight is 10000～20000;
Described initiator is a kind of of ammonium persulphate, Sodium Persulfate or Potassium Persulphate;
Described reductive agent is urea, quadrol, diethylamine, triethylamine, diethanolamine or trolamine;
Described water-soluble cross-linker is N,N methylene bis acrylamide.
Beneficial effect of the present invention is: adopt water medium dispersion copolymerization method, simplified production technique, reduce production costs, production technique is easy to control, easy to implement, has improved quality product, has reduced environmental pollution.Prepared product solid content is high and solvability good, is easy to preparation and uses.During use, do not need huge dissolution equipment, can in pipeline, directly inject, be convenient to automated operation and accurate-metering, save manpower, during use, without harmful organic solvent, stopped the secondary pollution to environment, be conducive to environment protection and save energy.
Embodiment
Following component is all weight part.
Embodiment 1
The polyoxyethylene glycol that is 10000 by mix monomer, weight-average molecular weight, urea, N,N methylene bis acrylamide and ammonium persulphate mix, and react 2 hours at 70 ℃, obtain described cationic flocculant; Described mix monomer is comprised of the component of following weight part: 60 parts of non-ionic monomers, 40 parts of cationic monomers; Described non-ionic monomer is that acrylamide and Methacrylamide form by weight 1:5 is composite; Described cationic monomer is that acrylyl oxy-ethyl-trimethyl salmiac and diallyl diethyl ammonium chloride form by 1:2 is composite.
In technique scheme, in mix monomer 100 weight parts, each composition weight umber is as follows:
The cationic flocculant that adopts aforesaid method to prepare, the weight-average molecular weight that records polymkeric substance with gel chromatograph is 6.5 * 10
6.
Embodiment 2
The polyoxyethylene that is 20000 by mix monomer, weight-average molecular weight, diethanolamine, N,N methylene bis acrylamide and Sodium Persulfate mix, and react 1 hour at 80 ℃, obtain described cationic flocculant; Described mix monomer is comprised of the component of following weight part: 70 parts of non-ionic monomers, 30 parts of cationic monomers; Described non-ionic monomer is that acrylamide and Methacrylamide form by weight 1:7 is composite; Described cationic monomer is that acrylyl oxy-ethyl-trimethyl salmiac and diallyl diethyl ammonium chloride form by 1:3 is composite.
In technique scheme, in mix monomer 100 weight parts, each composition weight umber is as follows:
The cationic flocculant that adopts aforesaid method to prepare, the weight-average molecular weight that records polymkeric substance with gel chromatograph is 8.3 * 10
6.
Claims (6)
1. a preparation method for cationic flocculant, is characterized in that, comprises the steps: mix monomer, dispersion agent, reductive agent, water-soluble cross-linker and initiator to mix, and at 70-80 ℃, reacts 1-2 hour, obtains described cationic flocculant; Described mix monomer is comprised of the component of following weight part: non-ionic monomer 60-70 part, cationic monomer 30-40 part; Described non-ionic monomer is that acrylamide and Methacrylamide form by weight 1:5-1:7 is composite; Described cationic monomer is that acrylyl oxy-ethyl-trimethyl salmiac and diallyl diethyl ammonium chloride form by 1:2-1:3 is composite.
2. method according to claim 1, is characterized in that, in mix monomer 100 weight parts, each composition weight umber is as follows:
3. method according to claim 1 and 2, is characterized in that, described dispersion agent is polyoxyethylene glycol or polyoxyethylene, and weight-average molecular weight is 10000～20000.
4. method according to claim 1 and 2, is characterized in that, described initiator is a kind of of ammonium persulphate, Sodium Persulfate or Potassium Persulphate.
5. method according to claim 1 and 2, is characterized in that, described reductive agent is urea, quadrol, diethylamine, triethylamine, diethanolamine or trolamine.
6. method according to claim 1 and 2, is characterized in that, described water-soluble cross-linker is N,N methylene bis acrylamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310461057.7A CN103524672A (en) | 2013-09-28 | 2013-09-28 | Method for preparing cationic flocculant |
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| CN201310461057.7A CN103524672A (en) | 2013-09-28 | 2013-09-28 | Method for preparing cationic flocculant |
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| CN103524672A true CN103524672A (en) | 2014-01-22 |
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| CN201310461057.7A Pending CN103524672A (en) | 2013-09-28 | 2013-09-28 | Method for preparing cationic flocculant |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105273131A (en) * | 2015-11-13 | 2016-01-27 | 常州工程职业技术学院 | Preparation method of cationic polyacrylamide emulsion |
| CN106046248A (en) * | 2016-07-19 | 2016-10-26 | 四川科尔瑞环保科技有限责任公司 | Cationic flocculant and preparation method thereof |
| CN106957673A (en) * | 2017-05-02 | 2017-07-18 | 东营黄蓝知识产权运营管理有限公司 | A kind of demulsifier and breaking method for thick oil emulsion breaking dehydration |
| CN112175592A (en) * | 2019-07-02 | 2021-01-05 | 中石化南京化工研究院有限公司 | Dendritic cationic polyacrylamide coating agent for water-based drilling fluid and preparation method thereof |
| CN112480310A (en) * | 2020-12-08 | 2021-03-12 | 爱森（中国）絮凝剂有限公司 | Cross-linked cationic polyacrylamide sludge dehydrating agent and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648740A (en) * | 2009-06-29 | 2010-02-17 | 上海东升新材料有限公司 | Cationic flocculant and preparation method thereof |
-
2013
- 2013-09-28 CN CN201310461057.7A patent/CN103524672A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648740A (en) * | 2009-06-29 | 2010-02-17 | 上海东升新材料有限公司 | Cationic flocculant and preparation method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105273131A (en) * | 2015-11-13 | 2016-01-27 | 常州工程职业技术学院 | Preparation method of cationic polyacrylamide emulsion |
| CN106046248A (en) * | 2016-07-19 | 2016-10-26 | 四川科尔瑞环保科技有限责任公司 | Cationic flocculant and preparation method thereof |
| CN106046248B (en) * | 2016-07-19 | 2019-04-16 | 四川科尔瑞环保科技有限责任公司 | Cationic flocculant and preparation method thereof |
| CN106957673A (en) * | 2017-05-02 | 2017-07-18 | 东营黄蓝知识产权运营管理有限公司 | A kind of demulsifier and breaking method for thick oil emulsion breaking dehydration |
| CN106957673B (en) * | 2017-05-02 | 2018-06-19 | 东营黄蓝知识产权运营管理有限公司 | A kind of demulsifier and breaking method for thick oil emulsion breaking dehydration |
| CN112175592A (en) * | 2019-07-02 | 2021-01-05 | 中石化南京化工研究院有限公司 | Dendritic cationic polyacrylamide coating agent for water-based drilling fluid and preparation method thereof |
| CN112175592B (en) * | 2019-07-02 | 2022-11-29 | 中石化南京化工研究院有限公司 | Dendritic cationic polyacrylamide coating agent for water-based drilling fluid and preparation method thereof |
| CN112480310A (en) * | 2020-12-08 | 2021-03-12 | 爱森（中国）絮凝剂有限公司 | Cross-linked cationic polyacrylamide sludge dehydrating agent and preparation method thereof |
| CN112480310B (en) * | 2020-12-08 | 2022-10-28 | 爱森（中国）絮凝剂有限公司 | Cross-linked cationic polyacrylamide sludge dehydrating agent and preparation method thereof |
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