CN102477127A - Synthetic process for hydrophobic polymeric flocculant with addition amount of initiator controlled - Google Patents
Synthetic process for hydrophobic polymeric flocculant with addition amount of initiator controlled Download PDFInfo
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- CN102477127A CN102477127A CN2010105676332A CN201010567633A CN102477127A CN 102477127 A CN102477127 A CN 102477127A CN 2010105676332 A CN2010105676332 A CN 2010105676332A CN 201010567633 A CN201010567633 A CN 201010567633A CN 102477127 A CN102477127 A CN 102477127A
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Abstract
The invention discloses a synthetic process for a hydrophobic polymeric flocculant with the addition amount of an initiator controlled. The process comprises the following steps: sequentially dissolving methyl methacrylate, acrylamide, acrylic acid, dimethyl diallyl ammonium chloride, sodium hydroxide and urea in pure water; adding sodium hydrosulphite, a foaming agent and the initiator, wherein, the addition amount of the initiator is 0.2%; neutralizing acrylic acid and carrying out uniform stirring; standing an obtained mixture and taking obtained aggregate out for purification; drying and grinding the aggregate so as to obtain a product. According to the invention, the hydrophobic polymeric flocculant can be successfully synthesized; the process is simple, time for synthesis is short, and the synthesized polymeric flocculant has excellent instant solubility and storage stability and does not become dilute, form microgel, present phase separation or produce white precipitate after stored for a long time; the addition amount of the initiator is controlled in the process of synthesis so as to improve the flocculation effect and the sedimentation velocity of the synthesized hydrophobic polymeric flocculant.
Description
Technical field
The present invention relates to control the synthesis technique of the hydrophobic polymer flocculation agent of initiator dosage.
Background technology
Along with rapid economy development, Energy production is on the rise with the environmental problem that consumption produces, and particularly water pollution problems has become the hot issue of various circles of society's common concern.In many municipal effluents and trade effluent, the petroleum industry oily(waste)water is the most representative.Oil-containing wastewater is mainly from land and offshore oil exploitation, processing, transportation (accident and draining), industrial water drainage.Oil pollutant forms oil film on the water surface, the isolated atmosphere and the water surface destroy the excess oxygen of water body, and the minimizing of oxygen in water can cause planktonic organism in the water body because of anoxic death by suffocation; Also can limit the photosynthesis of waterplant such as algae, influence the self-cleaning of water body; Oil pollutant is attached to the soil particle surface, in soil, forms oil film, makes air be difficult to penetrate, and destroys soil and the eubolism of mikrobe wherein, influences the normal growth of farm crop; In the biological treatment system, oil-contg exceeds standard will influence active sludge and biomembranous homergy, and effluent quality is difficult to guarantee.Therefore, it is extremely necessary handling oily(waste)water.
Oil content in the oily(waste)water exists with oil slick, dispersed oil, oil in water emulsion and four kinds of forms of dissolving wet goods usually.Because the difference of existence form, the method for handling oily(waste)water is also just different.At present external oil-contaminated water of oil field is handled the facility that adopts and is mainly contained settling pit, oil trap, inclined plate grease pond, removes oil tank, coarse jar, pressure slurry tank, flotation cell (post), pressure filter, single valve filter tank, built-up type treatment unit, hydrocyclone and secondary filter etc. except that oil tank, coagulation naturally.The affiliated facility that adopts has various buffering system jars (pond), reclaims water pot (pond), backwash tank (pond), slop oil tank, medicament establishing system, various water pump and oil-water metering facility etc.
In recent years, some new equipment have been developed in the processing of oily(waste)water (mainly being oil extraction-generated waste water) abroad, like novel closed float tank, hydrocyclone, various built-up type water-and-oil separators etc.The successful exploitation of these devices is all of great advantage to integrated and the reduction equipment volume and the construction costs etc. of the treatment effect that improves oily(waste)water, the treatment efficiency that improves equipment, realization treatment facility function.
Yet be not that single method is handled oily(waste)water and just can be reached the effluent quality requirement, several kinds of treatment processs of actual waste water treatment project needs are combined into various treatment process system and handle oily(waste)water.Along with science and technology development, the improvement technology of oil-contaminated water of oil field is strengthened when constantly exploring and is improved both at home and abroad in recent years.According to the data from abroad introduction, the characteristics and the important symbol of new oilfield produced water treatment process are that hydrocyclone is introduced flow process, substitute traditional oil removal and flotation cells.In the U.S. North Sea oil field re-injection oil-containing sewage treatment technique flow process, adopted 3 water-and-oil separators and 6 hydrocyclone series connection, the water quality after the processing can reach the requirement of re-injection water.Wherein oil-contg is reduced to below 20～30mg/L by 200～500mg/L (mainly existing with O/W type form of emulsion).In addition, the many oil removal by air bubbling technology that adopted of the U.S.'s its treatment process in newly-built oily water treatment station.U.S.'s Gulf oilfield produced water processing technological flow is made up of unit such as water-and-oil separator, flocculation, air supporting, GAC-FBR (gac biological fluidized-bed reactor), electrodialysis; Handle back day maximum oil content and be no more than 10mg/L, reached very strict emission control standards.Many scholars' research shows, handles the condensed oil sewage that contains some hardly degraded organic substances and generally adopts the biochemical oxidation method, and its technical process mainly comprises unit operations such as water-and-oil separator, air supporting, chemical oxidation, microbial film acidication, filtration.
Developed and produced multiple sewage-treating agent in order to improve the oily(waste)water processing efficiency, comprised coagulating agent, flocculation agent, flotation agent etc.Wherein the hydrophobic polymer flocculation agent can be accelerated water purification speed as efficient water conditioner, removes suspended substance and toxic substance in the water.The treatment process of oily(waste)water is also a lot, and particularly handle oily(waste)water and have the processing efficiency height, the residence time is short, energy consumption is low, occupation of land is little by the turbine air flotation method for wherein air supporting method, control and characteristics easy to maintenance.Add flotation agent during air supporting and can not only obtain better air flotation effect, and can shorten the flocculation reaction time, this is to reducing initial cost, cutting down the consumption of energy and working cost has great importance in the actual engineering.
Can roughly the flocculation agent of studying at present and using be divided into inorganic flocculating agent, organic floculant, composite flocculation agent and microbial flocculant four big classes according to the composition of flocculation agent and preparing method's difference.
(1) inorganic flocculating agent
The applicating history of inorganic flocculating agent is long, and traditional inorganic flocculating agent has low molecular inorganic salts such as Tai-Ace S 150, aluminum chloride, ferrous sulfate, iron trichloride, and its advantage is a less expensive, but there is bigger problem in they in water treatment procedure.Its consumption is big, and aggregation velocity is slow, and the floss of formation is little, and corrodibility is strong, and in wastewater treatment, usually causes the sludge dewatering difficulty, and sludge quantity is big, and is undesirable at some occasion purifying water effect, and replaced by inorganic polymer flocculant gradually.Inorganic polymer flocculant is after the sixties in 20th century, just to grow up in the world.In recent years, development and application polymeric aluminum, iron, silicon and various composite flocculant became focus.The kind of inorganic polymer flocculant is cationic in the series that China progressively forms to have Poly aluminum Chloride (PAC) (PAC), polyaluminium sulfate (PAS), polymer phosphate aluminium (PAP), bodied ferric sulfate (PFC), a polymer phosphate iron (PFP) etc.; Anionic activated silicic acid (AS), polymeric silicicacid (PS) arranged; Inorganic composite type aluminium iron polychloride (PAFC), poly-silicic acid iron sulfate (PFSS), polysilicate sulfuric acid aluminium (PASS), polymeric silicicacid iron(ic)chloride (PFSC), polymerization sulfuric chlorohydrin iron (PFCS), polymer aluminium silicate (PASI), polymeric silicicacid iron (PFSI), polymer phosphate ferro-aluminum (PSFP), silico-calcium composite polymeric iron(ic)chloride (SCPAFC) etc. are arranged.They and traditional flocculation agent relatively usefulness are more excellent, and more cheap than organic polymer coargulator, and be widely used in feeding water, the various flow processs of trade effluent and municipal effluent.
(2) organic polymer coargulator
The organic polymer coargulator molecular weight is big, of a great variety, have very strong adsorption bridging ability; Compare with inorganic polymer flocculant; Have that consumption is few, the flocculation dewatering ability is strong, settling velocity is fast, it is few to generate sludge quantity; And advantages such as the salt that coexisted, pH value and temperature effect are little received extensive attention in recent years, and it has a extensive future.Used at present and mainly contained organic polymer coargulator two major types synthetic and modification.
1. synthetic organic polymer flocculation agent
Press the electrically charged difference of macromolecular chain, that organic polymer coargulator can be divided into is cationic, four big types of anionic, non-ionic type and amphoteric ion types.SEPIGEL 305 (PAM) is owing to there is a small amount of carboxamido-group to be hydrolyzed to carboxyl in polymerization process; Often have the negatively charged ion characteristic; Usually degree of hydrolysis is called non-ionic polyacrylamide, the partially hydrolyzed polyacrylamide that is called greater than 4% less than 4% SEPIGEL 305.In anionic synthetic organic polymer flocculation agent, high, the good water solubility of the partially hydrolyzed polyacrylamide molecular weight that contains shuttle sodium base anionic group is the broad-spectrum polymeric flocculant of excellent performance.Generally obtain, perhaps add the hydrolytic reagent heating hydrolysis and make carboxamido-group partly change carboxylic sodium base into and obtain by SEPIGEL 305 by acrylic amide and sodium acrylate copolymerization.Because it contains equally distributed carboxyl anion, can combine to form corresponding gel with polyvalent metal ion, therefore effect is remarkable in containing heavy metal-polluted water treatment.In addition, ZX-I since higher, the good water solubility of its molecular weight, nontoxicity, strong throwing out also be used widely.Because how electronegative colloid and suspended particle be, use cationic flocculant can in particle electrically charged, reach the purpose of flocculation.Therefore, cationic high-molecular flocculant has become the focus of synthetic organic polymer flocculation agent.Consumption at state's cationic flocculants such as Japan and the United States accounts for 60% of synthetic flocculant total amount, and is annual also with the speed increment more than 10%.Cationic flocculant mainly is quaternary ammonium salts and polyamine class, and wherein cation-modified SEPIGEL 305 occupies larger proportion.Cation-modified SEPIGEL 305 generally obtains through copolymerization or mannich reaction, and main products has quaternary ammoniated cationic polyacrylamide, acrylic amide and N, N-dimethyl amido acrylamide copolymer.
Amphiphatic high polymer coagulant generally by the vinyl monomer that contains the yin, yang ionic group through free radicals copolymerization reaction and macromolecule modified obtaining, wherein anionic group is carboxyl, sulfonic group, sulfate, cation group is the quaternary amine alkali.Amphiphatic high polymer coagulant is owing to have the characteristics of yin, yang ionic group concurrently; Charged situation maybe be different under the different media condition, are suitable for handling the pollutent with different electric charges, and its pH value scope of application is wide; Salt resistance is good; Particularly when being directed against the pollution system of yin, yang ion coexist, Amphiphatic high polymer coagulant not only has electrical neutralization, adsorption bridging, and intermolecular " winding " package action is arranged.
2. natural modified polymeric flocculant
Natural modified family macromolecule organic floculant is one type of ecological safety type flocculation agent, compares with the synthetic organic polymer coargulator, has good " environmental acceptability ", and being one type has applications well prospect, cheap and good-quality novel flocculant.Because natural macromolecule flocculating agent electric density is less, molecular weight is on the low side, and molecular structure is difficult to regulation and control and is prone to biological degradation takes place and loses flocculation activity, so research direction mainly concentrates on they are carried out modification both at home and abroad.Can be divided into natural modified polymeric flocculant starch based, cellulose family, vegetable jelly class and gather polyose by raw material sources.Wherein the most noticeable to the modification of starch.Modification mainly contains the cationic starch of tertiary amine or quaternary amines through the etherification reaction preparation; Perhaps with monomer-grafted copolymerization, crosslinked such as acrylic amide, vinylformic acid; Make multipolymer also have the high molecular character of synthetic simultaneously; Make multipolymer be the cladodification structure, disperse the flocculation group, making it has stronger absorption, bridge formation, volume to sweep effect to the PM for particulate matter in the suspension system.Present domestic development and use mainly contain the starch-grafted polymkeric substance of hydroxyl (ISC), cationic starch CS-1 type etc.In addition, in development and appliable plant glue class, gather and also obtain remarkable progress aspect the natural modified polymeric flocculant of polyose.Like Xiao Yao etc., be raw material with the larch bark, not only flocculating effect is obvious with the quaternary ammoniated positively charged ion tannin JHF that obtains of Benzyl Chloride again after amine-methylated to tannin wherein, can also play inhibition, germ-resistant effect.Contain carboxamido-group, hydroxyl in the chitosan quasi-molecule; Can form stable huge legendary turtle compound with heavy metal ion; Through introducing methylol with the Monochloro Acetic Acid reaction, can make amphoteric chitosan after the hydrolysis, amido also capable of using and aldehyde radical reaction generate SChiff alkali; Select to contain in the molecular structure aldehyde of carboxyl, process amphoteric chitosan.Wu Gen etc. utilize the schiff base reaction between chitosan and the Vanillin, increase its side chain number and length, prepare flocculation agent VCG more efficiently, and its COD clearance is higher, and dosage is lower.
(3) composite flocculation agent
For the complicated water body of composition, single flocculation agent can not satisfy the requirement of water treatment usually.The development of composite flocculation agent is just arisen at the historic moment.Composite flocculation agent roughly is divided into inorganic composite flocculant, organic composite coagulator and inorganic organic composite coagulator three major types.Domestic and international research is primarily aimed at inorganic organic composite coagulator at present.The mechanism of action of such flocculation agent is: behind the sewage impurity absorption inorganic flocculating agent, the adsorption bridging effect through organic polymer coargulator precipitates.Because synergistic effect, composite flocculation agent has not only comprised the advantage of original single flocculation agent, has also remedied deficiency separately.Many reports are arranged recently both at home and abroad, as: usefulness PAC-PAM composite flocculation agents such as Chen Lifeng, Li Mingjun are respectively applied for ferrous salt, PAM composite flocculation agent and handle different turbidity sewages and contain the electroplating wastewater that C produces.Flocculating property, mechanism and optimal coagulant dose etc. to them have been done a series of deep researchs, be illustrated in soon the stage of stirring and be with compression double electric layer,
The absorption charge neutrality is main, and the stage of stirring is to be adsorbed as the master with bridging slowly, and incorgruous flocculation and difference fleece hocket with fixed attention in the quiet heavy stage, reach rapid settled purpose.Usefulness cationic polyacrylamide and the composite efficient flocculatings of having realized the living rhzomorph fermented liquid of centering of zeyssatite such as Li Shaojie have improved its liquid-solid separation performance greatly.
(4) microbial flocculant
Microbial flocculant is meant and utilizes microbial technique, through the fermentation of mikrobe, and extracting, refining and one type of flocculation agent obtaining has efficient, nontoxic, advantages such as the flocculation object is extensive, decolorizing effect uniqueness.In 70 generations of 20th century, Japanese scholar has found to have the microbial culture medium of throwing out in research phthalandione vinegar biodegradation process.In the later stage eighties, processed first kind of biological flocculant of called after NOC-1 and drop into suitability for industrialized production and be used for wastewater treatment.
The mid-90 in 20th century, the blue flocculation agent with the generation of P.alcaligenes 8724 bacterial strains of Chengdu biological study institute of Chinese Academy of Sciences anticipatory remark is to the processing of decolouring of dark plain waste water such as black liquor and paraxin, and its percent of decolourization reaches respectively more than 95% and 98%.Unit such as Institutes Of Technology Of Nanjing, Jiangsu Prov. Inst. of Microbiology has also carried out the purification and the applied research of microbial flocculant.
The hydrophobic polymer flocculation agent can be accelerated water purification speed as efficient water conditioner, removes suspended substance and toxic substance in the water.But; The instantly-soluble and the package stability that have the many hydrophobic polymer solution of synthetic now are not fine, and the hydrophobic polymer flocculation agent dissolves the thinning or formation microgel of solution postpone of a specified duration of back preparation owing to the introducing of hydrophobic monomer is difficult to dissolving; Even occur being separated, produce white precipitate.
In the synthesis technique of hydrophobic polymer flocculation agent, initiator dosage major decision the size of polymericular weight, there is an optimum value scope in molecular weight to the influence of flocculating property.The too little or too high effect that does not all have efficient flocculating of molecular weight is because the flocculation process of organic polymer coargulator relates generally to the charge neutrality and absorption two aspects of building bridge.When molecular weight is too low,, is difficult to produce the crane span structure effect and forms flco, play protective colloid on the contrary, cause that the part colloidal particle can't go down by flocculating settling in the supernatant though polymkeric substance can be adsorbed on the surface of particle.Along with polymericular weight increases, the size of macromole in solution is just big more, and the crane span structure ability is strong more, and flocculating effect strengthens.But the molecular weight that is not polymkeric substance is just good more to flocculating effect more greatly, and molecular weight is too big, and flocculation rate is too fast, can cause the suspended substance of fine particle to remain in the supernatant liquid.Molecular weight is too big in addition, and polymer water dissolubility variation is difficult for disperseing and dissolving in water body, is unfavorable for flocculation.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of synthesis technique of controlling the hydrophobic polymer flocculation agent of initiator dosage is provided, this synthesis technique can successfully synthesize the hydrophobic polymer flocculation agent; And technology is simple; Desired raw material cost and cost of labor are low, and generated time is short, and the polymeric flocculant that synthesizes has good instantly-soluble and package stability; Can not occur putting for a long time thinning, form microgel, occur being separated, produce the phenomenon of white precipitate; And pass through the initiator dosage in the control building-up process, thereby improved the flocculating effect and the settling velocity of the hydrophobic polymer flocculation agent that synthesizes.
The object of the invention is realized through following technical proposals: the synthesis technique of the hydrophobic polymer flocculation agent of control initiator dosage may further comprise the steps:
(a) TEB 3K is dissolved in the pure water;
(b) in the pure water that again acrylic amide, vinylformic acid, dimethyl diallyl ammonium chloride, sodium hydroxide, urea is dissolved in successively;
(c) add S-WAT then, stir;
(d) add whipping agent and initiator more successively, and control initiator quality accounts for 0.18%～0.22% of reaction system total mass, and add alkali vinylformic acid is neutralized, stir;
(e) standing and reacting for some time, take out polymer and purification that reaction generates;
(f) will react the dry and partical of pulverizing of the polymer that generates, promptly get the hydrophobic polymer flocculation agent.
In the said step (a), TEB 3K is dissolved in the pure water through absolute ethyl alcohol.
In the said step (d), whipping agent is a bicarbonate of ammonia.
In the said step (e), the polymer that reaction generates is purified through absolute ethyl alcohol.
In the said step (f), the polymer that reaction generates carries out drying in hot-air drier.
In the said step (d), alkali is sodium hydroxide.
In the said step (d), initiator is an ammonium persulphate.
In the said step (d), the initiator quality accounts for 0.2% of reaction system total mass.
The initiator dosage is: the initiator quality accounts for the mass percent of reaction system total mass.
In sum; The invention has the beneficial effects as follows: can successfully synthesize the hydrophobic polymer flocculation agent, and technology is simple, desired raw material cost and cost of labor are low; Generated time is short; The polymeric flocculant that synthesizes has good instantly-soluble and package stability, can not occur putting for a long time thinning, form microgel, occur being separated, produce the phenomenon of white precipitate; And pass through the initiator dosage in the control building-up process, thereby improved the flocculating effect and the settling velocity of the hydrophobic polymer flocculation agent that synthesizes.
Description of drawings
Fig. 1 is the influence curve figure of initiator dosage to transmittance;
Fig. 2 is the influence curve figure of initiator dosage to settling velocity.
Embodiment
Below in conjunction with embodiment, the present invention is done further detailed description, but embodiment of the present invention is not limited only to this.
Embodiment:
The synthesis technique of the hydrophobic polymer flocculation agent of the control initiator dosage that the present invention relates to, its concrete steps are following:
(a) TEB 3K is dissolved in the pure water;
(b) in the pure water that again acrylic amide, vinylformic acid, dimethyl diallyl ammonium chloride, sodium hydroxide, urea is dissolved in successively;
(c) add S-WAT then, stir;
(d) add whipping agent and initiator more successively, and control initiator quality accounts for 0.18%～0.22% of reaction system total mass, and add alkali vinylformic acid is neutralized, stir;
(e) standing and reacting for some time, take out polymer and purification that reaction generates;
(f) will react the dry and partical of pulverizing of the polymer that generates, promptly get the hydrophobic polymer flocculation agent.
In the said step (a), TEB 3K is dissolved in the pure water through absolute ethyl alcohol.
In the said step (d), whipping agent is a bicarbonate of ammonia.
In the said step (e), the polymer that reaction generates is purified through absolute ethyl alcohol.
In the said step (f), the polymer that reaction generates carries out drying in hot-air drier.
In the said step (d), alkali is sodium hydroxide.
In the said step (d), initiator is an ammonium persulphate.
In the said step (d), the initiator quality accounts for 0.2% of reaction system total mass.
In order to investigate of the influence of initiator dosage to flocculating effect and settling velocity; The present invention tests respectively; Because the flocculating effect of hydrophobic polymer flocculation agent directly can draw through its transmittance, so this test has recorded the influence of initiator dosage to transmittance, the result is like Fig. 1, shown in 2.
Can find out from Fig. 1,2: the too little or too high effect that does not all have efficient flocculating of molecular weight, because the flocculation process of organic polymer coargulator relates generally to the charge neutrality and absorption two aspects of building bridge.When molecular weight is too low,, is difficult to produce the crane span structure effect and forms flco, play protective colloid on the contrary, cause that the part colloidal particle can't go down by flocculating settling in the supernatant though polymkeric substance can be adsorbed on the surface of particle.Along with polymericular weight increases, the size of macromole in solution is just big more, and the crane span structure ability is strong more, and flocculating effect strengthens.But the molecular weight that is not polymkeric substance is just good more to flocculating effect more greatly, and molecular weight is too big, and flocculation rate is too fast, can cause the suspended substance of fine particle to remain in the supernatant liquid.Molecular weight is too big in addition, and polymer water dissolubility variation is difficult for disperseing and dissolving in water body, is unfavorable for flocculation.
To sum up, initiator dosage of the present invention is controlled at 0.18%～0.22%, and the best is 0.2%.
Above-mentioned synthesis technique can successfully synthesize the hydrophobic polymer flocculation agent; And technology is simple; Desired raw material cost and cost of labor are low, and generated time is short, and the polymeric flocculant that synthesizes has good instantly-soluble and package stability; Can not occur putting for a long time thinning, form microgel, occur being separated, produce the phenomenon of white precipitate; And pass through the initiator dosage in the control building-up process, thereby improved the flocculating effect and the settling velocity of the hydrophobic polymer flocculation agent that synthesizes.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations to above embodiment did all fall within protection scope of the present invention.
Claims (8)
1. the synthesis technique of the hydrophobic polymer flocculation agent of control initiator dosage is characterized in that, may further comprise the steps:
(a) TEB 3K is dissolved in the pure water;
(b) in the pure water that again acrylic amide, vinylformic acid, dimethyl diallyl ammonium chloride, sodium hydroxide, urea is dissolved in successively;
(c) add S-WAT then, stir;
(d) add whipping agent and initiator more successively, and control initiator quality accounts for 0.18%～0.22% of reaction system total mass, and add alkali vinylformic acid is neutralized, stir;
(e) standing and reacting for some time, take out polymer and purification that reaction generates;
(f) will react the dry and partical of pulverizing of the polymer that generates, promptly get the hydrophobic polymer flocculation agent.
2. the synthesis technique of the hydrophobic polymer flocculation agent of control initiator dosage according to claim 1 is characterized in that, in the said step (a), through absolute ethyl alcohol TEB 3K is dissolved in the pure water.
3. the synthesis technique of the hydrophobic polymer flocculation agent of control initiator dosage according to claim 1 is characterized in that, in the said step (d), whipping agent is a bicarbonate of ammonia.
4. the synthesis technique of the hydrophobic polymer flocculation agent of control initiator dosage according to claim 1 is characterized in that, in the said step (e), the polymer that reaction generates is purified through absolute ethyl alcohol.
5. the synthesis technique of the hydrophobic polymer flocculation agent of control initiator dosage according to claim 1 is characterized in that, in the said step (f), the polymer that reaction generates carries out drying in hot-air drier.
6. the synthesis technique of the hydrophobic polymer flocculation agent of control initiator dosage according to claim 1 is characterized in that, in the said step (d), alkali is sodium hydroxide.
7. the synthesis technique of the hydrophobic polymer flocculation agent of control initiator dosage according to claim 1 is characterized in that, in the said step (d), initiator is an ammonium persulphate.
8. the synthesis technique of the hydrophobic polymer flocculation agent of control initiator dosage according to claim 1 is characterized in that, in the said step (d), the initiator quality accounts for 0.2% of reaction system total mass.
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| CN114426326A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | Oily sewage treatment flocculant and preparation method and application thereof |
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| CN114426326A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | Oily sewage treatment flocculant and preparation method and application thereof |
| CN114426326B (en) * | 2020-09-21 | 2023-04-18 | 中国石油化工股份有限公司 | Oily sewage treatment flocculant and preparation method and application thereof |
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Application publication date: 20120530 |