CN105001381A - Preparation method for papermaking sludge based amphoteric polymer flocculent - Google Patents
Preparation method for papermaking sludge based amphoteric polymer flocculent Download PDFInfo
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Abstract
The present invention relates to a preparation method for a papermaking sludge based amphoteric polymer flocculent, comprising: dissolving a raw material of papermaking sludge directly with lye and crude extracting lignin; separating a supernatant fluid and adjusting pH of the supernatant fluid; cooling the supernatant fluid and adding an anhydrous sodium sulfite; then adding an initiator and dimethyl diallyl ammonium chloride; stirring the mixture for reaction; adding acetone and stirring the mixture; precipitating a reaction product; and vacuum filtering and drying the reaction product so as to obtain an amphoteric polymer flocculent product. When the obtained flocculant is used for treating a simulated water sample of colorant, a chroma removing rate of a dispersed yellow water sample can reach 66%, and a chroma removing rate of a methylene blue water sample can reach 35%; and combination with a conventional coagulant can significantly increase the coagulating treatment effect thereof. The preparation method in the present invention is simple to process and favorable for industrial production and application, realizing waste recycling, and the prepared flocculant has high coagulation efficiency and a wide application scope, and has a certain treatment effect on both anionic contaminants and cationic contaminants.
Description
Technical field
The present invention relates to a kind of preparation method of paper mill sludge base Amphiphatic high polymer coagulant, and be applied in multiple water treatment or sewage disposal, belong to changing waste into resources and utilize and water treatment flocculant technical field.
Background technology
Along with the sharp increase of China's expanding economy and population, the water resources day that the mankind depend on for existence shows poor, and the water resources crisis problem of ubiquity more and more becomes the important factor of restriction economy and social sustainable development.In current water treatment industry, coagulating agent is widely used in the field of engineering technology such as water and wastewater industry, water pollution control and purification of waste water reuse.Coagulating agent belongs to high-tech content high value added product, and it decides the innovation of water technology, the simplification of technical process, cost of water treatment and effects of purification quality to a great extent.Amphiphatic high polymer coagulant owing to having negatively charged ion, positively charged ion two kinds of groups concurrently on same macromolecule chain section.Under different media condition, its institute's ionic type of being with may be different, are applicable to the pollutent processing the different electric charge of band, and have the features such as the wide and salt resistance of applicable pH range is good.Therefore, novel, efficient both sexes coagulating agent research and development become the emphasis of water treatment agent development.
Paper mill sludge is the by product in pulp and paper effluent treatment process, has complicated component, water content is high, intractability is large, disposal costs high.At present, mainly concentrate on the following aspects about paper mill sludge method of disposal: composting, high temperature incineration, garbage loading embeading, above method exists that range of application is little, utilization ratio is low, easily cause the drawbacks such as secondary pollution.Paper mill sludge biomass content is enriched, organic content 50%-65%, main containing organism and filler, flocculation agents etc. such as Mierocrystalline cellulose, hemicellulose and xylogen, how paper mill sludge is carried out biomass as resources comprehensive utilization and be of great practical significance.
The recycling of current paper mill sludge mainly soil improvement agent, produce gac, manufacture permutite and make material of construction etc., Chinese patent document CN102205964A, CN102249745A, CN102503361A and CN1614142A individually disclose the related art scheme of paper mill sludge comprehensive utilization.Chinese patent literature CN102583684A discloses one and utilizes paper mill sludge to prepare wadding in actual application, and due to this flocculation agent range of application limitation, flocculating effect is poor, if reach good flocculating effect, needs to add other materials and carries out composite.Through retrieval, take paper mill sludge as the correlation technique of Material synthesis Amphiphatic high polymer coagulant, have not yet to see report.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of preparation method of paper mill sludge base Amphiphatic high polymer coagulant, obtained flocculation agent is the macromolecular polymeric flocculant with amphiprotic group, current potential is+3.0 ± 1.5mV, and molecular weight is 500kDa-1200kDa, is applied in multiple feedwater, wastewater treatment, flocculating effect is good, effluent quality significantly improves, and recycling paper mill sludge, achieves the Sustainable development of paper maker's industry simultaneously.
Technical scheme of the present invention is as follows:
A kind of preparation method of paper mill sludge base Amphiphatic high polymer coagulant, the paper mill sludge produced in alkali paper-making production process is adopted to be raw material, described paper mill sludge content of lignin 35 ~ 45wt%, content of cellulose 8 ~ 10wt%, water ratio 5 ~ 10wt%, all the other are earth, the grains of sand and inorganic salt impurities, and molecular weight is 1000Da, zeta current potential is at-30 ± 2mV
Preparation process is as follows:
(1) described paper mill sludge is added in deionized water, the quality of paper mill sludge and the volume ratio of deionized water are: 2:(40 ~ 60), unit: g/mL, drip NaOH solution and regulate pH to 10.5 ~ 11.0, fully be uniformly mixed, centrifugal, get supernatant liquor, regulate pH to be 7.0 ~ 7.5;
(2) supernatant liquor after adjustment pH is heated to 85 DEG C ~ 95 DEG C, stir 5 ~ 10min, add sodium sulphite anhydrous 99.3, the mass ratio of paper mill sludge and sodium sulphite anhydrous 99.3 is 2:(0.8 ~ 2.6), continue stirring reaction 1.5 ~ 2h; Reduce temperature of reaction to 55 ~ 65 DEG C, then disodium ethylene diamine tetraacetate is added, the mass ratio of paper mill sludge and disodium ethylene diamine tetraacetate is 2:(0.05 ~ 0.1), continue stirring reaction 5 ~ 15min, add the dimethyl diallyl ammonium chloride that mass concentration is 60 ~ 65% again, the volume ratio of paper mill sludge quality and dimethyl diallyl ammonium chloride is: 2:(5 ~ 9), unit: g/mL, stirring reaction 1.5 ~ 2h;
(3) after reaction terminates, be cooled to room temperature, add acetone and stir, reaction product is separated out, vacuum filtration, filter residue through washes of absolute alcohol, and after drying, obtains product.
The flocculation agent that the present invention obtains is the macromolecular polymeric flocculant with amphiprotic group, current potential is+3.0 ± 1.5mV, molecular weight is 500kDa-1200kDa, flocculation agent of the present invention by the impact of other coagulating agent kinds, does not still have good removal effect with the composite anionic of multiple inorganic flocculating agent and cationic pollutent.
The present invention is preferred, paper mill sludge described in step (1) is that black liquid drying after Coagulation with Treatment that alkali paper-making produces obtains, concrete Coagulation Method comprises stirs soon, mixes precipitation process slowly, and the time of stirring is 1 ~ 2min soon, and speed is 100 ~ 200 turns/min; Slowly the time of stirring is 10 ~ 20min, and speed is 20 ~ 50 turns/min; Sedimentation time is 10 ~ 25min; The chemical agent that Coagulation Method adds is common coagulating agent or flocculation agent.Coagulating agent or the optional polymerize aluminum chloride of flocculation agent (PAC), polyacrylamide, or Tai-Ace S 150.
The present invention is preferred, and in step (1), the volumetric molar concentration of NaOH solution is 1 ~ 2mol/L.
The present invention is preferred, drips mixed solution centrifugal 15 ~ 20min under the rotating speed of 6000 ~ 8000rpm that NaOH solution regulates pH to 10.5 ~ 11.0 in step (1).
The present invention is preferred, and in step (2), the mass ratio of paper mill sludge and sodium sulphite anhydrous 99.3 is 2:(1.5 ~ 2.5), highly preferred, the mass ratio of paper mill sludge and sodium sulphite anhydrous 99.3 is 2:2.5.
The present invention is preferred, and in step (2), the mass ratio of paper mill sludge and disodium ethylene diamine tetraacetate is 2:(0.06 ~ 0.08), highly preferred, the mass ratio of paper mill sludge and disodium ethylene diamine tetraacetate is 2:0.07.
The present invention is preferred, in step (2), the volume ratio of paper mill sludge quality and dimethyl diallyl ammonium chloride is: 2:(5 ~ 7), highly preferred, in step (2), the volume ratio of paper mill sludge quality and dimethyl diallyl ammonium chloride is: 2:6.
The present invention is preferred, and in step (2), the temperature of reaction adding dimethyl diallyl ammonium chloride is identical with the temperature of reaction adding disodium ethylene diamine tetraacetate.
The present invention is preferred, and in step (3), drying temperature is 40 ~ 55 DEG C.
The present invention is preferred, and in step (3), the volume ratio of paper mill sludge quality and acetone is: 2:(400 ~ 600), unit, g/mL, further preferably, the volume ratio of paper mill sludge quality and acetone is: 2:500, unit, g/mL.
The preferred technical scheme of the present invention, a kind of preparation method of paper mill sludge base Amphiphatic high polymer coagulant, comprises step as follows:
1) getting paper mill sludge 2.0g adds in deionized water 50ml, stirs the lower NaOH solution dripping 1mol/L, regulates pH 11.0, stirring 10min to mixing, then in the centrifugation 15min of 8000rpm, getting supernatant liquor, regulate pH to be 7.5;
2) supernatant liquor after adjustment pH is heated to 90 DEG C, after stirring 5min, adds sodium sulphite anhydrous 99.3 2.5g, continue stirring reaction 2h; Water-bath reduces temperature of reaction to 60 DEG C, and add disodium ethylene diamine tetraacetate 50mg, the reaction times is 10min; Add dimethyl diallyl ammonium chloride 6ml, continue stirring reaction 2h, temperature of reaction is 60 DEG C;
3) after reaction terminates, be cooled to room temperature, add 500ml acetone, stir, reaction product is separated out, vacuum filtration, get filter residue dehydrated alcohol and rinse three times, forced air drying at 50 DEG C, obtains product.
What the present invention utilized is alkali lignin in paper mill sludge, by under hot conditions, xylogen side chain is introduced negative sulfonic group, simultaneously under disodium ethylene diamine tetraacetate effect, be living radical by hydroxy activated in molecule, again with dimethyl diallyl ammonium chloride generation addition reaction, introduce positive quaternary ammonium group, thus form the macromole with amphiprotic group, anionic in water and cationic pollutent can be combined and play adsorption bridging and absorption charge neutrality effect, thus efficiently remove broad variety pollutent.
Concrete reaction formula is as follows:
Product prepared by the inventive method belongs to lignin-base Amphiphatic high polymer coagulant (LBF), and after measured, current potential is about+3.0mV and between iso-electric point, and molecular weight is about 500kDa ~ 1200kDa, is applicable to the process of multiple feedwater, waste water water sample.Treated dye wastewater water sample experiment test, the chroma removal rate of DISPERSE YELLOW (anionic dyes) water sample can reach 66%, the colourity of methylene blue (cationic dyes) water sample can reach 35%, and composite traditional coagulating agent significantly can increase its coagulating treatment effect.Content specifically will be illustrated in the examples below.
Compared with prior art, excellent results of the present invention is:
1. the present invention utilizes paper mill sludge for raw material, to the structure of lignin molecule and purity without particular requirement, directly can extract rugose wood element with getting supernatant liquor after alkali dissolution; production method technique is simple; reaction conditions is gentle, and be conducive to large-scale production, cost is low.
2. method of the present invention reaches the effect of changing waste into resources, not only reduces the discharge of solid waste, prevents the secondary pollution of paper mill sludge, and provides direction for the Sustainable development of paper industry.
3. flocculant product flocculation efficiency of the present invention is high, applied widely, all has stronger process effect to anionic and cationic pollutent.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but be not limited thereto.
The raw material paper mill sludge used in embodiment produces in the alkali paper-making process of paper mill, and wherein water ratio is about 6wt%, is about 40wt% containing xylogen, is about 10wt% containing Mierocrystalline cellulose, and all the other are the impurity such as earth, the grains of sand, inorganic salt.
The preparation of the paper mill sludge base Amphiphatic high polymer coagulant (LBF) of the different S-WAT addition of embodiment 1.
(1) getting paper mill sludge 2.0g adds in deionized water 50ml, stirs the lower NaOH solution dripping 1mol/L, regulates pH 11.0, stirring 10min to mixing, then in the centrifugation 15min of 8000rpm, getting supernatant liquor, regulate pH to be 7.5;
(2) supernatant liquor after adjustment pH is heated to 90 DEG C, after stirring 5min, adds sodium sulphite anhydrous 99.3 0.5g, 1.5g, 2.5g, 3.5g respectively, continue stirring reaction 2h; Water-bath reduces temperature of reaction to 60 DEG C, and add disodium ethylene diamine tetraacetate 50mg, the reaction times is 10min; Add dimethyl diallyl ammonium chloride 6ml, continue stirring reaction 2h, temperature of reaction is 60 DEG C;
(3) after reaction terminates, be cooled to room temperature, add 500ml acetone, stir, reaction product is separated out, vacuum filtration, get filter residue dehydrated alcohol and rinse three times, forced air drying at 50 DEG C, obtain four products that sodium sulphite anhydrous 99.3 addition is different.
The preparation of the paper mill sludge base Amphiphatic high polymer coagulant (LBF) of the different dimethyl diallyl ammonium chloride addition of embodiment 2.
(1) getting paper mill sludge 2.0g adds in deionized water 50ml, stirs the lower NaOH solution dripping 1mol/L, regulates pH 11.0, stirring 10min to mixing, then in the centrifugation 15min of 8000rpm, getting supernatant liquor, regulate pH to be 7.5;
(2) supernatant liquor after adjustment pH is heated to 90 DEG C, after stirring 5min, adds sodium sulphite anhydrous 99.3 2.5g, continue stirring reaction 2h; Water-bath reduces temperature of reaction to 60 DEG C, and add disodium ethylene diamine tetraacetate 50mg, the reaction times is 10min; Add dimethyl diallyl ammonium chloride 4ml, 6ml, 8ml, 10ml respectively, continue stirring reaction 2h, temperature of reaction is 60 DEG C;
(3), after reaction terminates, be cooled to room temperature, add 500ml acetone, stir, reaction product is separated out, vacuum filtration, get filter residue dehydrated alcohol and rinse three times, forced air drying at 50 DEG C, obtain four products that dimethyl diallyl ammonium chloride addition is different.
Application test: the preparation of simulation dyestuff water sample:
Take the disperse yellow dye of 0.1g, be added in the tap water of 1L, continue stirring until dyestuff and dissolve completely, be namely made into the simulation DISPERSE YELLOW water sample of 100mg/L.Take the methylene blue dye of 0.025g, be added in the tap water of 1L, continue stirring until dyestuff and dissolve completely, be namely made into the simulation methylene blue dye water sample of 25mg/L.Do flocculation agent treatment of simulated dyestuff water sample with product of the present invention, finally go out water treatment efficiency and represent with colourity (absorbancy) clearance (%).
Application example 1: the paper mill sludge base Amphiphatic high polymer coagulant (LBF) prepared by above-described embodiment 1 is in the process of simulation dyestuff water sample, and treatment effect is listed in the table below 1-1 and 1-2.
Table 1-1 simulates the chroma removal rate (%) of disperse yellow dye water sample
Table 1-2 simulates the chroma removal rate (%) of methylene blue dye water sample
As can be seen from the above two tables, flocculation agent of the present invention has stronger removal effect to anionic and cationic pollutent simultaneously, along with the increase of sodium sulphite anhydrous 99.3 dosage, the clearance of simulation methylene blue dye have obviously rise after tend to be steady, and in 0.5 ~ 2.5g condition portion, the impact of LBF on simulation disperse yellow dye removal effect is not obvious, but after dosage is greater than 2.5g, coagulation effect obviously declines.The present invention take 2.5g as optimum.
Application example 2: the paper mill sludge base Amphiphatic high polymer coagulant (LBF) above embodiment 2 prepared is for simulating the process of dyestuff water sample, and treatment effect is listed in the table below 2-1 and 2-2.
Table 1-1 simulates the chroma removal rate (%) of disperse yellow dye water sample
Table 1-2 simulates the chroma removal rate (%) of methylene blue dye water sample
As can be seen from the above two tables, dimethyl diallyl ammonium chloride addition has certain influence to product quality.Dimethyl diallyl ammonium chloride dosage is interval in 6 ~ 8ml, and the decolorizing efficiency of simulation disperse yellow dye and simulation methylene blue dye is higher, but along with after quaternary ammonium salt monomer dosage arrival certain value, chroma removal rate reduces on the contrary.The present invention take 6ml as optimum.
Application example 3: prepared by above embodiment 1 preferred after the composite poly-ferric chloride of LBF flocculation agent (PFC) for simulating the process of dyestuff water sample, (dosage is in the quality of iron, LBF add-on is 1.0mg/L), treatment effect is listed in the table below 3-1 and 3-2.
The chroma removal rate (%) of table 3-1 PFC-LBF complex treatment simulation disperse yellow dye water sample
| PFC dosage (mg/L) | 30 | 40 | 50 | 60 |
| PFC | 18.85 | 56.24 | 80.65 | 93.31 |
| PFC-LBF | 46.31 | 74.66 | 97.30 | 98.52 |
The chroma removal rate (%) of table 3-2 PFC-LBF complex treatment simulation methylene blue dyestuff water sample
| PFC dosage (mg/L) | 50 | 100 | 150 | 200 |
| PFC | 8.16 | 18.55 | 25.38 | 35.33 |
| PFC-LBF | 15.69 | 20.16 | 37.04 | 45.68 |
As can be seen from the above two tables, be compared to single PFC, the composite removal efficiency that can significantly improve two kinds of simulation dyestuff water samples of PFC-LBF, disperse yellow dye chroma removal rate for anionic is the highest can promote 30%, can promote 12% for cationic methylene blue Dye Wastewater Decolorization clearance is the highest.
Application example 4: prepared by above embodiment 1 preferred after the composite polymerize aluminum chloride of LBF flocculation agent (PAC) for simulating the process of dyestuff water sample, (dosage is in the quality of aluminium, LBF add-on is 1.0mg/L), treatment effect is listed in the table below 4-1 and 4-2.
The chroma removal rate (%) of table 4-1 PAC-LBF complex treatment simulation disperse yellow dye water sample
| PAC dosage (mg/L) | 5 | 10 | 15 | 20 |
| PAC | 48.59 | 78.96 | 93.26 | 90.68 |
| PAC-LBF | 63.58 | 88.03 | 98.22 | 95.71 |
The chroma removal rate (%) of table 4-2 PAC-LBF complex treatment simulation methylene blue dyestuff water sample
| PAC dosage (mg/L) | 25 | 50 | 75 | 100 |
| PAC | 9.19 | 18.68 | 23.66 | 30.78 |
| PAC-LBF | 18.25 | 24.14 | 34.96 | 39.11 |
As can be seen from the above two tables, be compared to single PAC, the composite removal efficiency that also can significantly improve two kinds of simulation dyestuff water samples of PAC-LBF, especially to the disperse yellow dye of anionic, its corresponding chroma removal rate improves 5 ~ 15%, can promote 6 ~ 11% for cationic methylene blue Dye Wastewater Decolorization clearance.
Claims (10)
1. the preparation method of a paper mill sludge base Amphiphatic high polymer coagulant, the paper mill sludge produced in alkali paper-making production process is adopted to be raw material, described paper mill sludge content of lignin 35 ~ 45wt%, content of cellulose 8 ~ 10wt%, water ratio 5 ~ 10wt%, all the other are earth, the grains of sand and inorganic salt impurities, and molecular weight is 1000Da, zeta current potential is at-30 ± 2mV
Preparation process is as follows:
(1) described paper mill sludge is added in deionized water, the quality of paper mill sludge and the volume ratio of deionized water are: 2:(40 ~ 60), unit: g/mL, drip NaOH solution and regulate pH to 10.5 ~ 11.0, fully be uniformly mixed, centrifugal, get supernatant liquor, regulate pH to be 7.0 ~ 7.5;
(2) supernatant liquor after adjustment pH is heated to 85 DEG C ~ 95 DEG C, stir 5 ~ 10min, add sodium sulphite anhydrous 99.3, the mass ratio of paper mill sludge and sodium sulphite anhydrous 99.3 is 2:(0.8 ~ 2.6), continue stirring reaction 1.5 ~ 2h; Reduce temperature of reaction to 55 ~ 65 DEG C, then disodium ethylene diamine tetraacetate is added, the mass ratio of paper mill sludge and disodium ethylene diamine tetraacetate is 2:(0.05 ~ 0.1), continue stirring reaction 5 ~ 15min, add the dimethyl diallyl ammonium chloride that mass concentration is 60 ~ 65% again, the volume ratio of paper mill sludge quality and dimethyl diallyl ammonium chloride is: 2:(5 ~ 9), unit, g/mL, stirring reaction 1.5 ~ 2h;
(3) after reaction terminates, be cooled to room temperature, add acetone and stir, reaction product is separated out, vacuum filtration, filter residue through washes of absolute alcohol, and after drying, obtains product.
2. the preparation method of paper mill sludge base Amphiphatic high polymer coagulant according to claim 1, it is characterized in that, paper mill sludge described in step (1) is that black liquid drying after Coagulation with Treatment that alkali paper-making produces obtains, concrete Coagulation Method comprises stirs soon, mixes precipitation process slowly, the time of stirring is 1 ~ 2min soon, and speed is 100 ~ 200 turns/min; Slowly the time of stirring is 10 ~ 20min, and speed is 20 ~ 50 turns/min; Sedimentation time is 10 ~ 25min; The chemical agent that Coagulation Method adds is coagulating agent or flocculation agent.
3. the preparation method of paper mill sludge base Amphiphatic high polymer coagulant according to claim 1, is characterized in that, in step (1), the volumetric molar concentration of NaOH solution is 1 ~ 2mol/L.
4. the preparation method of paper mill sludge base Amphiphatic high polymer coagulant according to claim 1, it is characterized in that, in step (1), drip mixed solution centrifugal 15 ~ 20min under the rotating speed of 6000 ~ 8000rpm that NaOH solution regulates pH to 10.5 ~ 11.0.
5. the preparation method of paper mill sludge base Amphiphatic high polymer coagulant according to claim 1, it is characterized in that, in step (2), the mass ratio of paper mill sludge and sodium sulphite anhydrous 99.3 is 2:(1.5 ~ 2.5), highly preferred, the mass ratio of paper mill sludge and sodium sulphite anhydrous 99.3 is 2:2.5.
6. the preparation method of paper mill sludge base Amphiphatic high polymer coagulant according to claim 1, it is characterized in that, in step (2), the mass ratio of paper mill sludge and disodium ethylene diamine tetraacetate is 2:(0.06 ~ 0.08), highly preferred, the mass ratio of paper mill sludge and disodium ethylene diamine tetraacetate is 2:0.07.
7. the preparation method of paper mill sludge base Amphiphatic high polymer coagulant according to claim 1, it is characterized in that, in step (2), the volume ratio of paper mill sludge quality and dimethyl diallyl ammonium chloride is: 2:(5 ~ 7), highly preferred, in step (2), the volume ratio of paper mill sludge quality and dimethyl diallyl ammonium chloride is: 2:6.
8. the preparation method of paper mill sludge base Amphiphatic high polymer coagulant according to claim 1, it is characterized in that, in step (2), the temperature of reaction adding dimethyl diallyl ammonium chloride is identical with the temperature of reaction adding disodium ethylene diamine tetraacetate.
9. the preparation method of paper mill sludge base Amphiphatic high polymer coagulant according to claim 1, it is characterized in that, in step (3), drying temperature is 40 ~ 55 DEG C, and the volume ratio of paper mill sludge quality and acetone is: 2:(400 ~ 600), unit, g/mL, further preferably, the volume ratio of paper mill sludge quality and acetone is: 2:500, unit, g/mL.
10. a preparation method for paper mill sludge base Amphiphatic high polymer coagulant according to claim 1, comprises step as follows:
1) getting paper mill sludge 2.0g adds in deionized water 50ml, stirs the lower NaOH solution dripping 1mol/L, regulates pH 11.0, stirring 10min to mixing, then in the centrifugation 15min of 8000rpm, getting supernatant liquor, regulate pH to be 7.5;
2) supernatant liquor after adjustment pH is heated to 90 DEG C, after stirring 5min, adds sodium sulphite anhydrous 99.3 2.5g, continue stirring reaction 2h; Water-bath reduces temperature of reaction to 60 DEG C, and add disodium ethylene diamine tetraacetate 50mg, the reaction times is 10min; Add dimethyl diallyl ammonium chloride 6ml, continue stirring reaction 2h, temperature of reaction is 60 DEG C;
3) after reaction terminates, be cooled to room temperature, add 500ml acetone, stir, reaction product is separated out, vacuum filtration, get filter residue dehydrated alcohol and rinse three times, forced air drying at 50 DEG C, obtains product.
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Cited By (4)
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| CN109133508A (en) * | 2018-09-05 | 2019-01-04 | 嘉兴市天伦纳米染整有限公司 | The high-efficient treatment method of textile printing and dyeing wastewater |
| CN110002557A (en) * | 2019-04-17 | 2019-07-12 | 山东大学 | A kind of preparation method of the high grafting rate paper mill sludge base Inorganic whisker water treatment agent of inorganic coagulant- |
| CN110892005A (en) * | 2017-03-09 | 2020-03-17 | Fp创新研究所 | Process for producing cationic lignin copolymer under acid water solution condition |
| CN114031696A (en) * | 2021-11-08 | 2022-02-11 | 中国石油大学(华东) | Beta-cyclodextrin-based polymer, beta-cyclodextrin-based amphoteric adsorbent and application thereof |
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| CN103964557A (en) * | 2014-05-21 | 2014-08-06 | 山东大学 | Method for preparing cationic organic flocculant by using paper-making sludge |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110892005A (en) * | 2017-03-09 | 2020-03-17 | Fp创新研究所 | Process for producing cationic lignin copolymer under acid water solution condition |
| CN109133508A (en) * | 2018-09-05 | 2019-01-04 | 嘉兴市天伦纳米染整有限公司 | The high-efficient treatment method of textile printing and dyeing wastewater |
| CN109133508B (en) * | 2018-09-05 | 2021-04-09 | 嘉兴市天伦纳米染整有限公司 | Efficient treatment method for textile printing and dyeing wastewater |
| CN110002557A (en) * | 2019-04-17 | 2019-07-12 | 山东大学 | A kind of preparation method of the high grafting rate paper mill sludge base Inorganic whisker water treatment agent of inorganic coagulant- |
| CN114031696A (en) * | 2021-11-08 | 2022-02-11 | 中国石油大学(华东) | Beta-cyclodextrin-based polymer, beta-cyclodextrin-based amphoteric adsorbent and application thereof |
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