CN105858837A - Flocculating agent for chemical wastewater and preparation method thereof - Google Patents
Flocculating agent for chemical wastewater and preparation method thereof Download PDFInfo
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- CN105858837A CN105858837A CN201610266104.6A CN201610266104A CN105858837A CN 105858837 A CN105858837 A CN 105858837A CN 201610266104 A CN201610266104 A CN 201610266104A CN 105858837 A CN105858837 A CN 105858837A
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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
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- 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
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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- Hydrology & Water Resources (AREA)
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- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a flocculating agent for chemical wastewater and a preparation method thereof. The flocculating agent for chemical wastewater comprises the following raw materials in parts by weight: 20-30 parts of nonionic monomer, 3-5 parts of anionic monomer, 10-20 parts of cationic monomer, 2-4 parts of dimethylaminoethyl methacrylate, 0.05-0.09 part of initiator, 0.3-0.5 part of ammonium persulfate, 120-140 parts of deionized water and 20-40 parts of fly ash, wherein the nonionic monomer includes acrylamide, methacrylamide and nitrogen substitute thereof. The flocculating agent disclosed by the invention has the advantages of higher density of charged groups, stronger adsorbing and capturing abilities against suspended particles, high-temperature resistance, high-salt resistance and acid-base resistance; compared with other flocculating agents, the flocculating agent has the characteristics of high broad-spectrum property, good stability and good flocculating effect; and in sewage treatment, the flocculating agent has better decolorizing effect and DOD removal effect and realizes comprehensive control of sewage, the chemical treatment effect on sewage is enhanced, and the waste fly ash is turned into wealth while comprehensive utilization is realized.
Description
Technical field
The present invention relates to a kind of chemical industry reagent, specifically a kind of wastewater from chemical industry flocculant and preparation method thereof.
Background technology
Chemical industry includes organic chemical industry and the big class of inorganic chemical industry two, and chemical products are varied, complicated component, chemical plant the waste water discharged is referred to as wastewater from chemical industry.Wastewater from chemical industry is varied, and majority has severe toxicity, is difficult to purify, has certain summation in vivo, have obvious oxygen consumption character, easily make water quality deterioration in water body.
The water-quality constituents of wastewater from chemical industry is complicated, and water-quality constituents is complicated, and by-product is many, and reaction raw materials is often the compound of solvent material or circulus, adds the intractability of waste water.Due to raw material reaction not exclusively and raw material or in producing a large amount of solvent mediums of use enter waste water system and cause Pollutants in Wastewater content the highest.And poisonous and harmful substance is many in wastewater from chemical industry, having many organic pollutions in Fine Chemistry Wastewater is poisonous and hazardous to microorganism.Such as halogen compounds, nitro compound, the dispersant with bactericidal action or surfactant etc..Moreover, in wastewater from chemical industry, bio-refractory material is many, and biodegradability is poor, and chroma in waste water is high.
Owing to wastewater from chemical industry environmental pollution is very big, so the process carrying out wastewater from chemical industry is the most necessary, existing production is relatively costly, is unfavorable for popularizing in an all-round way and application.Chemical wastewater treatment industry now, water quality is increasingly sophisticated, and the requirement to Water Treatment Chemicals improves the most increasingly.Polymer flocculants polyacrylamide conventional in the market, the monomer structure of employing is more single, and product uses faciostenosis, it is impossible to meet the requirement of different industries different quality.
Summary of the invention
It is an object of the invention to provide wastewater from chemical industry flocculant of a kind of broad spectrum activity height, good stability and preparation method thereof, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme:
A kind of wastewater from chemical industry flocculant, includes according to the raw material of weight portion: non-ionic monomer 20-30 part, anionic monomer 3-5 part, cationic monomer 10-20 part, dimethylaminoethyl methacrylate monomer 2-4 part, initiator 0.05-0.09 part, Ammonium persulfate. 0.3-0.5 part, deionized water 120-140 part, flyash 20-40 part.
As the further scheme of the present invention: described wastewater from chemical industry flocculant, include according to the raw material of weight portion: non-ionic monomer 22-28 part, anionic monomer 3.5-4.5 part, cationic monomer 12-18 part, dimethylaminoethyl methacrylate monomer 2.5-3.5 part, initiator 0.06-0.08 part, Ammonium persulfate. 0.35-0.45 part, deionized water 125-135 part, flyash 25-35 part.
As the further scheme of the present invention: described wastewater from chemical industry flocculant, include according to the raw material of weight portion: non-ionic monomer 25 parts, anionic monomer 4 parts, cationic monomer 15 parts, dimethylaminoethyl methacrylate monomer 3 parts, initiator 0.07 part, Ammonium persulfate. 0.4 part, deionized water 130 parts, 30 parts of flyash.
As the further scheme of the present invention: described non-ionic monomer is acrylamide, Methacrylamide and nitrogen substituent thereof.
As the further scheme of the present invention: described cationic monomer is acrylyl oxy-ethyl-trimethyl salmiac, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride or combination.
As the further scheme of the present invention: described anionic monomer is one or more in sodium acrylate, 2-acryloyl group-2-methyl propane sulfonic acid sodium and acryloyl morpholine.
As the present invention further scheme: described initiator is redox initiator, water miscible azo-initiator or combination.
The preparation method of described wastewater from chemical industry flocculant, specifically comprises the following steps that
(1) each raw material is weighed according to weight portion；
(2) flyash and hydrochloric acid solution are blended in ultrasonic environment, at 40-80 DEG C, process 1-3h obtain modified coal ash, the weight concentration of hydrochloric acid solution is 32-36%, the consumption of hydrochloric acid solution is for being enough to soak flyash, ultrasonic frequency is 60-80KHz, power density is 50-70w/L, and so operation can greatly improve the stability of product, can improve the product stability of 20%-30%；
(3) dimethylaminoethyl methacrylate monomer is positioned over 50-70 DEG C, carries out distilation under the conditions of negative pressure 0.094-0.098MPa, quaternizing agent is added in the dimethylaminoethyl methacrylate monomer after purifying, and obtains quaternized monomer；
null(4) by non-ionic monomer、Anionic monomer、Cationic monomer、Ammonium persulfate. and deionized water are sequentially added in the reactor of vacuum dispersion machine，Start temperature to control at 35-45 DEG C，10-20min is stirred with the rotating speed of 500-600rpm，During stirring，Temperature is with 1 DEG C-2 DEG C increases per minute，After stirring terminates，Stand 5-10min again，Start temperature to control then to stir 10-20min with the rotating speed of 500-600rpm at 35-45 DEG C，Temperature is successively decreased with 1 DEG C-2 DEG C per minute，Stand 5-10min again，The last nitrogen that is blown into again is except dissolved oxygen，It is eventually adding initiator and carries out polyreaction，Polyreaction effect can be preferably improved by aforesaid operations，15%-20% to be improved than existing level，On the other hand the stability of product is also advantageously improved，Product stability is made to be further enhanced；
(5) after polyreaction carries out 3-4h, modified coal ash after addition process, continuing reaction 4-6h and obtain emulsion, then add sodium hydroxide in emulsion, adjusting emulsion pH value is 5.5-6, then stirring 20-30min is continued with the rotating speed of 700-900rpm, obtaining flocculant finished product, whole finished product manufacturing process is simple, and production cost is relatively low, using if popularized in an all-round way, can be that country saves financial expenditure 1-10 hundred million yuan every year.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention has more high density charged group, higher to the absorption capturing ability of water-borne glue body, particle, high temperature resistant, high salt tolerance, antiacid alkali, has broad spectrum activity high, good stability compared with other flocculant, the feature that flocculating effect is good, when sewage disposal, there is higher decolorizing effect and higher removal DOD effect, reach comprehensive regulation effect of sewage, i.e. enhance the effect of chemicals treatment sewage, making again flyash turn waste into wealth, comprehensively utilized, the production cost of product is relatively low, meet the needs of country, be suitable to popularize in an all-round way and application.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the technical scheme of this patent is described in more detail.
Embodiment 1
A kind of wastewater from chemical industry flocculant, includes according to the raw material of weight portion: non-ionic monomer 20 parts, anionic monomer 3 parts, cationic monomer 10 parts, dimethylaminoethyl methacrylate monomer 2 parts, initiator 0.05 part, Ammonium persulfate. 0.3 part, deionized water 120 parts, 20 parts of flyash.
The preparation method of described wastewater from chemical industry flocculant, specifically comprises the following steps that
(1) each raw material is weighed according to weight portion；
(2) flyash and hydrochloric acid solution being blended in ultrasonic environment, process 1h and obtain modified coal ash at 40 DEG C, the weight concentration of hydrochloric acid solution is 32%, and the consumption of hydrochloric acid solution is for being enough to soak flyash, and ultrasonic frequency is 60KHz, and power density is 50w/L；
(3) dimethylaminoethyl methacrylate monomer is positioned over 50 DEG C, carries out distilation under the conditions of negative pressure 0.094MPa, quaternizing agent is added in the dimethylaminoethyl methacrylate monomer after purifying, and obtains quaternized monomer；
(4) non-ionic monomer, anionic monomer, cationic monomer, Ammonium persulfate. and deionized water are sequentially added in the reactor of vacuum dispersion machine, start temperature and control at 35 DEG C, 10min is stirred with the rotating speed of 500rpm, during stirring, temperature is with 2 DEG C of increases per minute, after stirring terminates, stand 5min again, start temperature to control then to stir 10min with the rotating speed of 500rpm at 45 DEG C, temperature is successively decreased with 2 DEG C per minute, stand 5min again, be blown into nitrogen the most again and remove dissolved oxygen, be eventually adding initiator and carry out polyreaction；
(5) after polyreaction carries out 3h, the modified coal ash after addition process, continue reaction 4h and obtain emulsion, then in emulsion, add sodium hydroxide, adjusting emulsion pH value is 5.5, then with the rotating speed continuation stirring 20min of 700rpm, obtains flocculant finished product.
Embodiment 2
A kind of wastewater from chemical industry flocculant, includes according to the raw material of weight portion: non-ionic monomer 22 parts, anionic monomer 3.5 parts, cationic monomer 12 parts, dimethylaminoethyl methacrylate monomer 2.5 parts, initiator 0.06 part, Ammonium persulfate. 0.35 part, deionized water 125 parts, 25 parts of flyash.
The preparation method of described wastewater from chemical industry flocculant, specifically comprises the following steps that
(1) each raw material is weighed according to weight portion；
(2) flyash and hydrochloric acid solution are blended in ultrasonic environment, processing 1.5h at 50 DEG C and obtain modified coal ash, the weight concentration of hydrochloric acid solution is 33%, and the consumption of hydrochloric acid solution is for being enough to soak flyash, ultrasonic frequency is 65KHz, and power density is 55w/L；
(3) dimethylaminoethyl methacrylate monomer is positioned over 55 DEG C, carries out distilation under the conditions of negative pressure 0.095MPa, quaternizing agent is added in the dimethylaminoethyl methacrylate monomer after purifying, and obtains quaternized monomer；
(4) non-ionic monomer, anionic monomer, cationic monomer, Ammonium persulfate. and deionized water are sequentially added in the reactor of vacuum dispersion machine, start temperature and control at 38 DEG C, 12min is stirred with the rotating speed of 520rpm, during stirring, temperature is with 2 DEG C of increases per minute, after stirring terminates, stand 5min again, start temperature to control then to stir 12min with the rotating speed of 520rpm at 45 DEG C, temperature is successively decreased with 2 DEG C per minute, stand 5min again, be blown into nitrogen the most again and remove dissolved oxygen, be eventually adding initiator and carry out polyreaction；
(5) after polyreaction carries out 3.2h, the modified coal ash after addition process, continues reaction 4.5h and obtains emulsion, sodium hydroxide is added again in emulsion, adjusting emulsion pH value is 5.6, then continues stirring 22min with the rotating speed of 750rpm, obtains flocculant finished product.
Embodiment 3
A kind of wastewater from chemical industry flocculant, includes according to the raw material of weight portion: non-ionic monomer 25 parts, anionic monomer 4 parts, cationic monomer 15 parts, dimethylaminoethyl methacrylate monomer 3 parts, initiator 0.07 part, Ammonium persulfate. 0.4 part, deionized water 130 parts, 30 parts of flyash.
The preparation method of described wastewater from chemical industry flocculant, specifically comprises the following steps that
(1) each raw material is weighed according to weight portion；
(2) flyash and hydrochloric acid solution being blended in ultrasonic environment, process 2h and obtain modified coal ash at 60 DEG C, the weight concentration of hydrochloric acid solution is 34%, and the consumption of hydrochloric acid solution is for being enough to soak flyash, and ultrasonic frequency is 70KHz, and power density is 60w/L；
(3) dimethylaminoethyl methacrylate monomer is positioned over 60 DEG C, carries out distilation under the conditions of negative pressure 0.096MPa, quaternizing agent is added in the dimethylaminoethyl methacrylate monomer after purifying, and obtains quaternized monomer；
(4) non-ionic monomer, anionic monomer, cationic monomer, Ammonium persulfate. and deionized water are sequentially added in the reactor of vacuum dispersion machine, start temperature and control at 40 DEG C, 15min is stirred with the rotating speed of 550rpm, during stirring, temperature is with 1.5 DEG C of increases per minute, after stirring terminates, stand 7.5min again, start temperature to control then to stir 15min with the rotating speed of 550rpm at 40 DEG C, temperature is successively decreased with 1.5 DEG C per minute, stand 7.5min again, be blown into nitrogen the most again and remove dissolved oxygen, be eventually adding initiator and carry out polyreaction；
(5) after polyreaction carries out 3.5h, the modified coal ash after addition process, continue reaction 5h and obtain emulsion, then in emulsion, add sodium hydroxide, adjusting emulsion pH value is 5.8, then with the rotating speed continuation stirring 25min of 800rpm, obtains flocculant finished product.
Embodiment 4
A kind of wastewater from chemical industry flocculant, includes according to the raw material of weight portion: non-ionic monomer 28 parts, anionic monomer 4.5 parts, cationic monomer 18 parts, dimethylaminoethyl methacrylate monomer 3.5 parts, initiator 0.08 part, Ammonium persulfate. 0.45 part, deionized water 135 parts, 35 parts of flyash.
The preparation method of described wastewater from chemical industry flocculant, specifically comprises the following steps that
(1) each raw material is weighed according to weight portion；
(2) flyash and hydrochloric acid solution are blended in ultrasonic environment, processing 2.5h at 70 DEG C and obtain modified coal ash, the weight concentration of hydrochloric acid solution is 35%, and the consumption of hydrochloric acid solution is for being enough to soak flyash, ultrasonic frequency is 75KHz, and power density is 65w/L；
(3) dimethylaminoethyl methacrylate monomer is positioned over 65 DEG C, carries out distilation under the conditions of negative pressure 0.097MPa, quaternizing agent is added in the dimethylaminoethyl methacrylate monomer after purifying, and obtains quaternized monomer；
(4) non-ionic monomer, anionic monomer, cationic monomer, Ammonium persulfate. and deionized water are sequentially added in the reactor of vacuum dispersion machine, temperature controls at 45 DEG C, 20min is stirred with the rotating speed of 600rpm, during stirring, temperature adds with 1 DEG C per minute, after stirring terminates, stand 10min again, temperature controls then to stir 20min with the rotating speed of 600rpm at 45 DEG C, temperature is successively decreased with 1 DEG C per minute, stand 100min again, be blown into nitrogen the most again and remove dissolved oxygen, be eventually adding initiator and carry out polyreaction；
(5) after polyreaction carries out 3.8h, the modified coal ash after addition process, continues reaction 5.5h and obtains emulsion, sodium hydroxide is added again in emulsion, adjusting emulsion pH value is 5.9, then continues stirring 28min with the rotating speed of 850rpm, obtains flocculant finished product.
Embodiment 5
A kind of wastewater from chemical industry flocculant, includes according to the raw material of weight portion: non-ionic monomer 30 parts, anionic monomer 5 parts, cationic monomer 20 parts, dimethylaminoethyl methacrylate monomer 4 parts, initiator 0.09 part, Ammonium persulfate. 0.5 part, deionized water 140 parts, 40 parts of flyash.
The preparation method of described wastewater from chemical industry flocculant, specifically comprises the following steps that
(1) each raw material is weighed according to weight portion；
(2) flyash and hydrochloric acid solution being blended in ultrasonic environment, process 3h and obtain modified coal ash at 80 DEG C, the weight concentration of hydrochloric acid solution is 36%, and the consumption of hydrochloric acid solution is for being enough to soak flyash, and ultrasonic frequency is 80KHz, and power density is 70w/L；
(3) dimethylaminoethyl methacrylate monomer is positioned over 70 DEG C, carries out distilation under the conditions of negative pressure 0.098MPa, quaternizing agent is added in the dimethylaminoethyl methacrylate monomer after purifying, and obtains quaternized monomer；
(4) non-ionic monomer, anionic monomer, cationic monomer, Ammonium persulfate. and deionized water are sequentially added in the reactor of vacuum dispersion machine, start temperature and control at 45 DEG C, 20min is stirred with the rotating speed of 600rpm, during stirring, temperature is with 2 DEG C of increases per minute, after stirring terminates, stand 10min again, start temperature to control then to stir 20min with the rotating speed of 600rpm at 45 DEG C, temperature is successively decreased with 2 DEG C per minute, stand 5min again, be blown into nitrogen the most again and remove dissolved oxygen, be eventually adding initiator and carry out polyreaction；
(5) after polyreaction carries out 4h, the modified coal ash after addition process, continue reaction 6h and obtain emulsion, then in emulsion, add sodium hydroxide, adjusting emulsion pH value is 6, then with the rotating speed continuation stirring 30min of 900rpm, obtains flocculant finished product.
Described non-ionic monomer is acrylamide, Methacrylamide and nitrogen substituent thereof；Described cationic monomer is acrylyl oxy-ethyl-trimethyl salmiac, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride or combination；Described anionic monomer is one or more in sodium acrylate, 2-acryloyl group-2-methyl propane sulfonic acid sodium and acryloyl morpholine；Described initiator is redox initiator, water miscible azo-initiator or combination.
The present invention has more high density charged group, higher to the absorption capturing ability of water-borne glue body, particle, high temperature resistant, high salt tolerance, antiacid alkali, there is compared with other flocculant broad spectrum activity high, good stability, the feature that flocculating effect is good, when sewage disposal, has higher decolorizing effect and higher removal DOD effect, reach comprehensive regulation effect of sewage, i.e. enhance the effect of chemicals treatment sewage, make again flyash turn waste into wealth, comprehensively utilized.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art is possessed, it is also possible to various changes can be made on the premise of without departing from this patent objective.
Claims (8)
1. a wastewater from chemical industry flocculant, it is characterized in that, include according to the raw material of weight portion: non-ionic monomer 20-30 part, anionic monomer 3-5 part, cationic monomer 10-20 part, dimethylaminoethyl methacrylate monomer 2-4 part, initiator 0.05-0.09 part, Ammonium persulfate. 0.3-0.5 part, deionized water 120-140 part, flyash 20-40 part.
Wastewater from chemical industry flocculant the most according to claim 1, it is characterized in that, include according to the raw material of weight portion: non-ionic monomer 22-28 part, anionic monomer 3.5-4.5 part, cationic monomer 12-18 part, dimethylaminoethyl methacrylate monomer 2.5-3.5 part, initiator 0.06-0.08 part, Ammonium persulfate. 0.35-0.45 part, deionized water 125-135 part, flyash 25-35 part.
Wastewater from chemical industry flocculant the most according to claim 1, it is characterized in that, include according to the raw material of weight portion: non-ionic monomer 25 parts, anionic monomer 4 parts, cationic monomer 15 parts, dimethylaminoethyl methacrylate monomer 3 parts, initiator 0.07 part, Ammonium persulfate. 0.4 part, deionized water 130 parts, 30 parts of flyash.
4. according to the arbitrary described wastewater from chemical industry flocculant of claim 1-3, it is characterised in that described non-ionic monomer is acrylamide, Methacrylamide and nitrogen substituent thereof.
5. according to the arbitrary described wastewater from chemical industry flocculant of claim 1-3, it is characterised in that described cationic monomer is acrylyl oxy-ethyl-trimethyl salmiac, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride or combination.
6. according to the arbitrary described wastewater from chemical industry flocculant of claim 1-3, it is characterised in that described anionic monomer is one or more in sodium acrylate, 2-acryloyl group-2-methyl propane sulfonic acid sodium and acryloyl morpholine.
7. according to the arbitrary described wastewater from chemical industry flocculant of claim 1-3, it is characterised in that described initiator is redox initiator, water miscible azo-initiator or combination.
8. one kind profit require 1-3 arbitrary as described in the preparation method of wastewater from chemical industry flocculant, it is characterised in that specifically comprise the following steps that
(1) each raw material is weighed according to weight portion；
(2) flyash and hydrochloric acid solution are blended in ultrasonic environment, processing 1-3h at 40-80 DEG C and obtain modified coal ash, the weight concentration of hydrochloric acid solution is 32-36%, and the consumption of hydrochloric acid solution is for being enough to soak flyash, ultrasonic frequency is 60-80KHz, and power density is 50-70w/L；
(3) dimethylaminoethyl methacrylate monomer is positioned over 50-70 DEG C, carries out distilation under the conditions of negative pressure 0.094-0.098MPa, quaternizing agent is added in the dimethylaminoethyl methacrylate monomer after purifying, and obtains quaternized monomer；
(4) by non-ionic monomer, anionic monomer, cationic monomer, Ammonium persulfate. and deionized water are sequentially added in the reactor of vacuum dispersion machine, start temperature and control at 35-45 DEG C, 10-20min is stirred with the rotating speed of 500-600rpm, during stirring, temperature is with 1 DEG C-2 DEG C increases per minute, after stirring terminates, stand 5-10min again, start temperature to control then to stir 10-20min with the rotating speed of 500-600rpm at 35-45 DEG C, temperature is successively decreased with 1 DEG C-2 DEG C per minute, stand 5-10min again, the last nitrogen that is blown into again is except dissolved oxygen, it is eventually adding initiator and carries out polyreaction；
(5) after polyreaction carries out 3-4h, the modified coal ash after addition process, continues reaction 4-6h and obtains emulsion, sodium hydroxide is added again in emulsion, adjusting emulsion pH value is 5.5-6, then continues stirring 20-30min with the rotating speed of 700-900rpm, obtains flocculant finished product.
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| CN201610266104.6A CN105858837A (en) | 2016-04-27 | 2016-04-27 | Flocculating agent for chemical wastewater and preparation method thereof |
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| CN106348412A (en) * | 2016-10-28 | 2017-01-25 | 辽宁石油化工大学 | Flocculant for chemical industry wastewater |
| CN106865647A (en) * | 2017-03-21 | 2017-06-20 | 苏州顶裕节能设备有限公司 | A kind of inorganic agent suitable for food industry sewage and preparation method thereof |
| CN107082844A (en) * | 2017-06-01 | 2017-08-22 | 北京宏涛技术开发有限公司 | For ore dressing and the amphoteric polyacrylamide flocculating agent and preparation method of tailings glass |
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| CN106348412A (en) * | 2016-10-28 | 2017-01-25 | 辽宁石油化工大学 | Flocculant for chemical industry wastewater |
| CN106865647A (en) * | 2017-03-21 | 2017-06-20 | 苏州顶裕节能设备有限公司 | A kind of inorganic agent suitable for food industry sewage and preparation method thereof |
| CN107082844A (en) * | 2017-06-01 | 2017-08-22 | 北京宏涛技术开发有限公司 | For ore dressing and the amphoteric polyacrylamide flocculating agent and preparation method of tailings glass |
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