CN113636632A - Composite polymeric flocculant and preparation method thereof - Google Patents
Composite polymeric flocculant and preparation method thereof Download PDFInfo
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- CN113636632A CN113636632A CN202111070775.2A CN202111070775A CN113636632A CN 113636632 A CN113636632 A CN 113636632A CN 202111070775 A CN202111070775 A CN 202111070775A CN 113636632 A CN113636632 A CN 113636632A
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- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims abstract description 22
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 22
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 22
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 18
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000010323 ascorbic acid Nutrition 0.000 claims abstract description 11
- 229960005070 ascorbic acid Drugs 0.000 claims abstract description 11
- 239000011668 ascorbic acid Substances 0.000 claims abstract description 11
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims abstract description 11
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 11
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims abstract description 11
- 235000019345 sodium thiosulphate Nutrition 0.000 claims abstract description 11
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 9
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 9
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 9
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 229920002401 polyacrylamide Polymers 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 238000006116 polymerization reaction Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 9
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 4
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000008394 flocculating agent Substances 0.000 abstract description 10
- 238000004062 sedimentation Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 239000011859 microparticle Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 description 4
- 230000001112 coagulating effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a composite polymeric flocculant and a preparation method thereof, belonging to the technical field of flocculants, wherein the composite polymeric flocculant comprises the following raw materials in parts by weight: 50-200 parts of acrylamide, 40-190 parts of acrylic acid, 15-80 parts of sodium hydroxide, 0.2-4 parts of potassium persulfate, 0.1-3 parts of sodium thiosulfate, 0.01-0.5 part of ascorbic acid, 0.05-50 parts of isopropanol, 0.2-1 part of sulfuric acid, 200-1000 parts of ferrous sulfate, 0.001-0.01 part of sodium nitrite and 300-1500 parts of water; the composite flocculant is adopted, and after the organic flocculant and the inorganic flocculant are mixed, the organic flocculant plays a role of bridging, and floccules generated by the inorganic flocculant are connected together to form larger floccules, so that the sedimentation of the microparticles is accelerated, the wastewater treatment effect is effectively improved by adopting the composite flocculant, and the wastewater treatment cost is reduced.
Description
Technical Field
The invention relates to the technical field of flocculating agents, in particular to a composite polymeric flocculating agent and a preparation method thereof.
Background
The theoretical basis of the flocculant is as follows: the 'coalescence' theory, the flocculating agent is mainly that some particles or granules which have positive (negative) electric property and are difficult to separate and have negative (positive) electric property in water are close to each other, the electric potential of the flocculating agent is reduced, the flocculating agent is in an unstable state, the particles are concentrated by utilizing the polymerization property of the flocculating agent and are separated by a physical or chemical method, and the flocculating agent is mainly applied to the field of sewage treatment.
During the mining or production operation of metallurgical mine, can dissolve out the ore pulp, because the ore pulp contains most harmful substance such as all contain heavy metal, consequently, need handle earlier when the discharge, the characteristics of mine waste water or ore pulp are: the waste water amount is large, and the water flow time is long; the water discharging points are dispersed, the water quality and the water quantity change greatly along with seasons and climates, and the water discharging device is rich in various metal ions and the like.
The main method for treating mine ore pulp or wastewater at present is a coagulating sedimentation method, wherein the coagulating sedimentation method is adsorption sedimentation by using a flocculating agent, and the coagulating sedimentation method is the most effective and simplest method.
Disclosure of Invention
In view of the above, the present invention provides a composite polymeric flocculant and a preparation method thereof, so as to solve the following problems existing in the existing traditional manufacturing process: the mine ore pulp waste water amount is large, the water flow time is long, various substances are complex and different, and a single flocculating agent is difficult to treat.
In order to solve the technical problems, the invention provides a composite polymeric flocculant, which comprises the following raw materials in parts by weight: 50-200 parts of acrylamide, 40-190 parts of acrylic acid, 15-80 parts of sodium hydroxide, 0.2-4 parts of potassium persulfate, 0.1-3 parts of sodium thiosulfate, 0.01-0.5 part of ascorbic acid, 0.05-50 parts of isopropanol, 0.2-1 part of sulfuric acid, 200-1000 parts of ferrous sulfate, 0.001-0.01 part of sodium nitrite and 300-1500 parts of water.
The preparation method of the composite polymeric flocculant is characterized by comprising the following steps:
(1) preparing an organic flocculant, dissolving sodium hydroxide in water, neutralizing with acrylic acid in a reaction kettle, adding acrylamide after neutralization, dissolving sodium thiosulfate, ascorbic acid and isopropanol in water, adding the sodium thiosulfate, the ascorbic acid and the isopropanol into the reaction kettle, finally dissolving potassium persulfate in water, adding the potassium persulfate into the reaction kettle, initiating a polymerization reaction at the temperature of 15-45 ℃, carrying out adiabatic natural heating, wherein the polymerization reaction time is 20-80 min, and granulating, drying and crushing after the reaction is finished to obtain polyacrylamide powder;
(2) preparing an inorganic flocculant, namely sequentially adding sulfuric acid, ferrous sulfate and water into a reaction tank, then connecting the solution into a reaction kettle, adding oxygen and sodium nitrite, discharging a finished product solution into a finished product tank after the ferrous ions in the solution are reacted, introducing a liquid finished product into a spray tower through a pipeline in the finished product tank, spraying the liquid finished product out of a high-pressure spray head, blowing high-temperature hot air heated by a hot blast stove into the tower, and quickly drying atomized polymeric ferric sulfate in the air to produce a solid finished product, wherein the sprayed solid finished product is discharged from a material receiving port;
(3) and stirring and mixing the prepared polyacrylamide powder and polymeric ferric sulfate, and bagging.
Further, the ratio of the polyacrylamide powder to the polymeric ferric sulfate is 1: 3 to 4.
Further, the dosage ratio of the sodium hydroxide to the acrylic acid is 2: 5.
further, the reaction temperature for preparing the polyacrylamide is 20-45 ℃.
Further, the time of the polymerization reaction is 60-70 min.
Furthermore, the amount of the sodium nitrite is 1-2 g per ton of finished products. .
Compared with the prior art, the invention has the beneficial technical effects that:
1. the composite flocculant is adopted, and after the organic flocculant and the inorganic flocculant are mixed, the organic flocculant plays a role of bridging, and floccules generated by the inorganic flocculant are connected together to form larger floccules, so that the sedimentation of the microparticles is accelerated, the wastewater treatment effect is effectively improved by adopting the composite flocculant, and the wastewater treatment cost is reduced.
Detailed Description
The following examples are given to illustrate specific embodiments of the present invention, but are not intended to limit the scope of the present invention in any way. The instruments and devices referred to in the following examples are conventional instruments and devices unless otherwise specified; the industrial raw materials are all conventional industrial raw materials which are sold on the market if not specifically indicated; the processing and manufacturing methods are conventional methods unless otherwise specified.
Example 1:
a composite polymeric flocculant comprises the following raw materials in parts by weight: 90 parts of acrylamide, 120 parts of acrylic acid, 50 parts of sodium hydroxide, 0.4 part of potassium persulfate, 0.5 part of sodium thiosulfate, 0.02 part of ascorbic acid, 3 parts of isopropanol, 0.8 part of sulfuric acid, 800 parts of ferrous sulfate, 0.008 part of sodium nitrite and 1200 parts of water.
The preparation method of the composite polymeric flocculant is characterized by comprising the following steps:
(1) preparing an organic flocculant, namely dissolving 50 parts of sodium hydroxide in 350 parts of water, neutralizing with 120 parts of acrylic acid in a reaction kettle, adding 90 parts of acrylamide after neutralization, dissolving 0.5 part of sodium thiosulfate, 0.02 part of ascorbic acid and 3 parts of isopropanol in 40 parts of water, adding 0.4 part of potassium persulfate in 10 parts of water into the reaction kettle, initiating a polymerization reaction at the temperature of 20 ℃, carrying out adiabatic natural temperature rise, wherein the polymerization reaction time is 60min, and granulating, drying and crushing after the reaction is finished to obtain polyacrylamide powder;
(2) preparing an inorganic flocculant, namely sequentially adding 0.8 part of sulfuric acid, 800 parts of ferrous sulfate and 800 parts of water into a reaction tank, then connecting the solution and adding into a reaction kettle, adding oxygen and 0.008 part of sodium nitrite, discharging the finished solution into a finished product tank after the reaction of ferrous ions in the solution is finished, introducing the liquid finished product into a spray tower through a pipeline in the finished product tank, spraying out the liquid finished product through a high-pressure spray head, blowing high-temperature hot air heated by a hot blast stove into the tower, and quickly drying atomized polymeric ferric sulfate in the air to produce a solid finished product, wherein the sprayed solid finished product is discharged from a material receiving port;
(3) and stirring and mixing the prepared polyacrylamide powder and polymeric ferric sulfate, and bagging.
In this example, the concentration of the prepared polyacrylamide gel is relatively low, and the drying time is long.
Example 2:
a composite polymeric flocculant comprises the following raw materials in parts by weight: 125 parts of acrylamide, 185 parts of acrylic acid, 75 parts of sodium hydroxide, 0.5 part of potassium persulfate, 0.25 part of sodium thiosulfate, 0.05 part of ascorbic acid, 40 parts of isopropanol, 0.9 part of sulfuric acid, 900 parts of ferrous sulfate, 0.009 part of sodium nitrite and 1100 parts of water.
The preparation method of the composite polymeric flocculant is characterized by comprising the following steps:
(1) preparing an organic flocculant, namely dissolving 75 parts of sodium hydroxide in 160 parts of water, neutralizing with 185 parts of acrylic acid in a reaction kettle, adding 125 parts of acrylamide after neutralization, dissolving 0.25 part of sodium thiosulfate, 0.05 part of ascorbic acid and 40 parts of isopropanol in 30 parts of water, adding 0.5 part of potassium persulfate in 10 parts of water into the reaction kettle, initiating a polymerization reaction at the temperature of 30 ℃, raising the temperature naturally in an adiabatic manner, wherein the polymerization reaction time is 70min, and granulating, drying and crushing after the reaction is finished to obtain polyacrylamide powder;
(2) preparing an inorganic flocculant, namely sequentially adding 0.9 part of sulfuric acid, 900 parts of ferrous sulfate and 900 parts of water into a reaction tank, then connecting the solution and adding into a reaction kettle, adding oxygen and 0.009 part of sodium nitrite, discharging the finished solution into a finished product tank after the reaction of ferrous ions in the solution is finished, introducing the liquid finished product into a spray tower through a pipeline in the finished product tank, spraying out the liquid finished product through a high-pressure spray head, blowing high-temperature hot air heated by a hot blast stove into the tower, and quickly drying atomized polyferric sulfate in the air to produce a solid finished product, wherein the sprayed solid finished product is discharged from a material receiving port;
(3) and stirring and mixing the prepared polyacrylamide powder and polymeric ferric sulfate, and bagging.
In this embodiment, the prepared polyacrylamide gel has a high concentration and a high drying speed, and the ratio of the polyacrylamide powder to the polyferric sulfate is 1: 3, the effect is good in use.
While the present invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various changes and modifications can be made in the specific parameters of the embodiments without departing from the spirit of the present invention, and it is intended to cover all the modifications and changes of the present invention.
Claims (7)
1. The composite polymeric flocculant is characterized by comprising the following raw materials in parts by weight:
50-200 parts of acrylamide, 40-190 parts of acrylic acid, 15-80 parts of sodium hydroxide, 0.2-4 parts of potassium persulfate, 0.1-3 parts of sodium thiosulfate, 0.01-0.5 part of ascorbic acid, 0.05-50 parts of isopropanol, 0.2-1 part of sulfuric acid, 200-1000 parts of ferrous sulfate, 0.001-0.01 part of sodium nitrite and 300-1500 parts of water.
2. The method for preparing a composite polymeric flocculant according to claim 1, comprising the steps of:
(1) preparing an organic flocculant, dissolving sodium hydroxide in water, neutralizing with acrylic acid in a reaction kettle, adding acrylamide after neutralization, dissolving sodium thiosulfate, ascorbic acid and isopropanol in water, adding the sodium thiosulfate, the ascorbic acid and the isopropanol into the reaction kettle, finally dissolving potassium persulfate in water, adding the potassium persulfate into the reaction kettle, initiating a polymerization reaction at the temperature of 15-45 ℃, carrying out adiabatic natural heating, wherein the polymerization reaction time is 20-80 min, and granulating, drying and crushing after the reaction is finished to obtain polyacrylamide powder;
(2) preparing an inorganic flocculant, namely sequentially adding sulfuric acid, ferrous sulfate and water into a reaction tank, then connecting the solution into a reaction kettle, adding oxygen and sodium nitrite, discharging a finished product solution into a finished product tank after the ferrous ions in the solution are reacted, introducing a liquid finished product into a spray tower through a pipeline in the finished product tank, spraying the liquid finished product out of a high-pressure spray head, blowing high-temperature hot air heated by a hot blast stove into the tower, and quickly drying atomized polymeric ferric sulfate in the air to produce a solid finished product, wherein the sprayed solid finished product is discharged from a material receiving port;
(3) and stirring and mixing the prepared polyacrylamide powder and polymeric ferric sulfate, and bagging.
3. The method for preparing the composite polymeric flocculant of claim 2, wherein the ratio of the polyacrylamide powder to the polymeric ferric sulfate is 1: 3 to 4.
4. The method according to claim 2, wherein the ratio of the sodium hydroxide to the acrylic acid is 2: 5.
5. the method for preparing the composite polymeric flocculant according to claim 2, wherein the reaction temperature for preparing the polyacrylamide is 20-45 ℃.
6. The method for preparing the composite polymeric flocculant according to claim 2, wherein the polymerization reaction time is 60 to 70 min.
7. The method for preparing the composite polymeric flocculant according to claim 2, wherein the amount of the sodium nitrite is 1 to 2g per ton of finished product.
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| CN202111070775.2A CN113636632A (en) | 2021-09-13 | 2021-09-13 | Composite polymeric flocculant and preparation method thereof |
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|---|---|---|---|
| CN202111070775.2A CN113636632A (en) | 2021-09-13 | 2021-09-13 | Composite polymeric flocculant and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114456300A (en) * | 2021-12-30 | 2022-05-10 | 云南森博混凝土外加剂有限公司 | Flocculant for sand washing and dressing and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831030A (en) * | 2010-06-09 | 2010-09-15 | 邵赛 | Preparation method of anionic polyacrylamide |
| CN108529729A (en) * | 2018-05-19 | 2018-09-14 | 原建光 | Preparation method of solid composite water purifying agent |
| CN109928473A (en) * | 2019-03-08 | 2019-06-25 | 宁夏水投清水源水处理科技有限公司 | A kind of composite water purifying efficient flocculant preparation process |
-
2021
- 2021-09-13 CN CN202111070775.2A patent/CN113636632A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831030A (en) * | 2010-06-09 | 2010-09-15 | 邵赛 | Preparation method of anionic polyacrylamide |
| CN108529729A (en) * | 2018-05-19 | 2018-09-14 | 原建光 | Preparation method of solid composite water purifying agent |
| CN109928473A (en) * | 2019-03-08 | 2019-06-25 | 宁夏水投清水源水处理科技有限公司 | A kind of composite water purifying efficient flocculant preparation process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114456300A (en) * | 2021-12-30 | 2022-05-10 | 云南森博混凝土外加剂有限公司 | Flocculant for sand washing and dressing and preparation method thereof |
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Application publication date: 20211112 |