CN107162146B - A kind of synthetic method and application of the agent of organic polymer decolorization flocculation - Google Patents
A kind of synthetic method and application of the agent of organic polymer decolorization flocculation Download PDFInfo
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- CN107162146B CN107162146B CN201710398514.0A CN201710398514A CN107162146B CN 107162146 B CN107162146 B CN 107162146B CN 201710398514 A CN201710398514 A CN 201710398514A CN 107162146 B CN107162146 B CN 107162146B
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- 238000005189 flocculation Methods 0.000 title claims abstract description 19
- 230000016615 flocculation Effects 0.000 title claims abstract description 19
- 238000004042 decolorization Methods 0.000 title claims abstract description 17
- 238000010189 synthetic method Methods 0.000 title claims abstract description 12
- 229920000620 organic polymer Polymers 0.000 title claims abstract description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical class [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004202 carbamide Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000010792 warming Methods 0.000 claims abstract description 6
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 5
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 14
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 8
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims description 7
- 239000004471 Glycine Substances 0.000 claims description 7
- 235000013922 glutamic acid Nutrition 0.000 claims description 7
- 239000004220 glutamic acid Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 7
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 10
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- 230000003311 flocculating effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000004043 dyeing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000008394 flocculating agent Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical class OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- -1 cyanurotriamide modified dicyandiamide Chemical class 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 235000021050 feed intake Nutrition 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 238000007031 hydroxymethylation reaction Methods 0.000 description 1
- 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 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000009941 weaving 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses the synthetic methods and application of a kind of organic polymer decolorization flocculation agent, belong to technical field of sewage.The decolorization flocculation agent is a kind of modified dicyandiamine-formaldehyde cation type resin, synthetic method is as follows: 100 parts of dicyandiamides, 10 ~ 50 parts of urea, 50 ~ 100 parts of ammonium chlorides, 1 ~ 10 part of crosslinking agent, 100 ~ 150 parts of formalins (37% mass concentration) are successively put into reactor, it stirs and is controlled at 40 ~ 80 DEG C and react, after reacting balance, the formalin of amount same as described above is added dropwise under same temperature ranges stated, it is added dropwise and is warming up to 60 ~ 80 DEG C of reaction 2h, it is cooled to room temperature, it gets product, is colorless and transparent thick liquid.This process conditions is simply easily operated, and reaction condition is mildly easily controllable, and production cost is low；Products application has decolorizing efficiency high in waste water decoloring, and dosage is few, and flocculating effect is good, and wadding body is big, settles the advantages that fast.
Description
Technical field
The invention belongs to technical field of sewage, the synthetic method of especially a kind of organic polymer decolorization flocculation agent and
Using.
Background technique
With the fast development of the industries such as China's papermaking, weaving, printing and dyeing, ink, chemical industry, cultivation, the colorful wastewater of generation
Increasingly increase, with the raising of environmental requirement, environmental protection and promotion every profession and trade hair are had become to being effectively treated for colorful wastewater
The important subject of exhibition.Currently, mainly having absorption method, chemical oxidization method, bioanalysis, flocculation sedimentation to colorful wastewater processing
Deng.For flocculation sedimentation since processing cost is low, effect is good, obtains more and more promoting and approving, used in flocculant point
For organic flocculant and inorganic flocculating agent two major classes.
Dicyandiamide-formaldehyde resin has good decoloration and reduction COD as one of organic flocculantCrEffect,
It is widely used in colorful wastewater processing.Dicyandiamide-formaldehyde resin cationic charge density with higher, it is logical
It crosses and a large amount of positive charges is provided, charge neutrality occurs with the negative electrical charge on dye molecule, it is made to lose stabilization, then adsorbed by bridge formation,
The dye molecule after sieve of beating takes off surely is rolled up, biggish floccule body is formed and is separated from the water out together, to reach the mesh of decoloration
's.A large amount of technical paper and patented technology, the preparation side generallyd use are delivered the country to the research of dicyandiamide-formaldehyde resin
Method is that dicyandiamide and formaldehyde feed intake by a certain percentage, under acid chlorization ammonium catalytic action, while carrying out hydroxymethylation
And polycondensation reaction.CN102476844A discloses a kind of using dicyandiamide, formaldehyde, ammonium chloride, ammonium hydroxide as the height of Material synthesis
Imitate printing and dying industry wastewater flocculating agent technology；CN102675573A discloses one kind with dicyandiamide, formaldehyde, ammonium chloride, inorganic acid as original
The slant acidity liquid dicyandiamide yuban for expecting synthesis and its application technology in dyeing；CN103351454A,
CN1233593A, CN101085688A, CN1348926A are disclosed with aluminium chloride or aluminium polychloride, alum modified dicyandiamine first
The method of aldehyde flocculant, reduces production cost；CN105439267A discloses a kind of cyanurotriamide modified dicyandiamide first
The preparation method of urea formaldehyde and compounded technology with inorganic flocculating agent.
But since the first polymers molecular weight that dicyandiamide and formaldehyde are formed is small, the active function groups on strand are insufficient, sun
Ionic charge density is smaller, insufficient to the negative electrical charge charge neutrality on the dye molecule in colorful wastewater, and adsorption capacity is weaker, causes
Its formed the tiny dispersion of wadding body, decoloration effect of settling it is poor, clarify it is relatively difficult, it usually needs increase dosage and with it is inorganic
Flocculant (aluminium polychloride, bodied ferric sulfate etc.), polyacrylamide are used with the use of that can achieve the effect that decolorization flocculation
Cost, effect and operability are all subject to certain restrictions its application, therefore improve the degree of polymerization of dicyandiamide formaldehyde resin, increase
Cationic charge density on molecule, so that it is had both good decolorizing effect and flocculating effect becomes research emphasis.
Summary of the invention
The object of the invention is to various in colorful wastewater decoloration application in order to solve existing dicyandiamide formaldehyde resin
Drawback provides a kind of existing excellent decolorizing effect, and has the transformed lines show of good flocculating effect.The present invention is by following
What technical solution was achieved: a kind of synthetic method and application of organic polymer decolorization flocculation agent, the specific steps are as follows:
A) by 100 parts of dicyandiamides, 10 ~ 50 parts of urea, 50 ~ 100 parts of ammonium chlorides, 1 ~ 10 part of crosslinking agent, 100 ~ 150 parts of formaldehyde
Aqueous solution (37% mass concentration) is successively put into reactor, stirs and the system that slowly heats up is to 30 ~ 40 DEG C；
B) stop heating, start to react, system temperature gradually rises, and control reaction temperature carries out at 40 ~ 80 DEG C；
C the formalin of amount same as described above is added dropwise) after reacting balance, under same temperature ranges stated, liter is added dropwise
Temperature is cooled to room temperature to get finished product to 60 ~ 80 DEG C of insulation reaction 2h, is colorless and transparent thick liquid.
Dicyandiamide, urea, ammonium chloride, crosslinking agent, formalin (37% mass concentration) weight ratio are 1:0.1 ~ 0.5:
0.5 ~ 1:0.01 ~ 0.1:2 ~ 3, preferably 1:0.2 ~ 0.3:0.6 ~ 0.8:0.02 ~ 0.08:2.2 ~ 2.5；
Step A) in crosslinking agent be glutamic acid and glycine, glutamic acid, glycine weight ratio be 1:0.5 ~ 2；
Step A) in, it feeds intake and finishes, need pre-heating temperature elevation system to 30 ~ 40 DEG C；
Step B) in, control reaction temperature carries out at 40 ~ 80 DEG C, and preferably 50 ~ 60 DEG C；
Step C) in, it is added dropwise and is warming up to 60 ~ 80 DEG C of insulation reaction 2h, preferably 75 ~ 80 DEG C；
Formalin is that point 2 equivalent are added, and is disposably to put into for the first time, is dropwise addition mode for the second time；
(120 DEG C, 1h) of the finished product solid content are 45 ~ 55%, PH (30% aqueous solution) 3.0 ~ 5.0, viscosity (cps, 20 DEG C)
200~1000；
The decolorization flocculation agent is 50 ~ 500ppm, COD for waste water decoloring dosageCr85% or more removal rate, percent of decolourization
95% or more.
There is difunctional (- NH while the present invention is by the way that low molecular weight is added into reactant2And-COOH) object
Matter can participate in methylol reaction and participate in polycondensation reaction, make dicyandiamide formaldehyde just polymers cross-linked polymeric, increase molecule
Amount and cationic charge density, product have decolorizing efficiency high in colorful wastewater processing, and dosage is few, and flocculating effect is good, wadding
Body is big, settles the advantages that fast.
Specific embodiment
In order to help to better understand inventive concept, deepen the understanding to inventive technique scheme, below by way of specific reality
It applies example and further detailed description is done to the present invention, it is not to this hair that following implementations, which are merely illustrative of the invention's technical idea,
The limitation of bright range.
Embodiment 1
By 100g dicyandiamide, 20g urea, 80g ammonium chloride, 1.3g glutamic acid, 0.65g glycine, 110g formalin
(37% mass concentration) is successively put into the 500ml reaction flask with thermometer and blender, is opened stirring (revolving speed 200rpm) and is delayed
Slow heating system stops heating, starts to react to 30 ~ 35 DEG C, and system temperature gradually rises, and controls reaction temperature in 50 ~ 55 DEG C
Lower progress is added dropwise the formalin of amount same as described above, drips in 1 hour after reaction 30 minutes under same temperature ranges stated
Finish and be warming up to 75 DEG C of insulation reaction 2h, be cooled to room temperature to get finished product, is colorless and transparent thick liquid, solid content (120 DEG C,
It 1h) is 54.8%, PH (30% aqueous solution) 3.50, viscosity (20 DEG C) 280cps.
Embodiment 2
By 100g dicyandiamide, 30g urea, 60g ammonium chloride, 2.7g glutamic acid, 5.3g glycine, 125g formalin
(37% mass concentration) is successively put into the 500ml reaction flask with thermometer and blender, is opened stirring (revolving speed 200rpm) and is delayed
Slow heating system stops heating, starts to react to 35 ~ 40 DEG C, and system temperature gradually rises, and controls reaction temperature in 55 ~ 60 DEG C
Lower progress is added dropwise the formalin of amount same as described above, drips in 1 hour after reaction 30 minutes under same temperature ranges stated
Finish and be warming up to 80 DEG C of insulation reaction 2h, be cooled to room temperature to get finished product, is colorless and transparent thick liquid, solid content (120 DEG C,
It 1h) is 50.4%, PH (30% aqueous solution) 4.60, viscosity (20 DEG C) 860cps.
Embodiment 3
By 1000g dicyandiamide, 250g urea, 700g ammonium chloride, 25g glutamic acid, 25g glycine, 1175g formalin
(37% mass concentration) is successively put into the 3L reaction flask with thermometer and blender, opens stirring (revolving speed 200rpm) simultaneously slowly
Heating system stops heating, starts to react to 30 ~ 35 DEG C, and system temperature gradually rises, and controls reaction temperature at 50 ~ 55 DEG C
It carries out, after reaction 1 hour, the formalin of amount same as described above is added dropwise under same temperature ranges stated, is added dropwise simultaneously in 2 hours
80 DEG C of insulation reaction 2h are warming up to, are cooled to room temperature to get finished product, are colorless and transparent thick liquid, solid content (120 DEG C, 1h)
For 52.7%, PH (30% aqueous solution) 4.10, viscosity (20 DEG C) 570cps.
Embodiment 4
By sample prepared by embodiment 1 and commercially available similar decolorising agent with deionized water be configured to identical solid content (50 ±
0.5%) aqueous solution, stirs evenly, and then dilutes 50 times with deionized water, is respectively applied to certain printing and dyeing mill's colorful wastewater, specifically
Application process are as follows: it takes 200g dyeing waste water to be placed in 250ml beaker, adjusts pH value 7.5 ~ 8, the decolorising agent 2g after dilution is added dropwise
(being equivalent to 200ppm) stirs 1 minute (revolving speed 200rpm), and supernatant is taken to survey indices after standing 30 minutes, as a result as follows
Shown in table:
Embodiment 5:
The sample of the preparation of embodiment 1 ~ 3 is configured to the aqueous solution of identical solid content (50 ± 0.5%) with deionized water, is stirred
It mixes uniformly, then dilutes 50 times with deionized water, different amounts is taken to be applied in dyeing waste water described in application examples 1, application
Process is same as above.
Can be seen that from use above example can reach under less dosage using the decolorization flocculation agent that this technique synthesizes
Good decolorizing effect and COD removal rate, and have apparent flocculation ability, sinking speed is fast, in practical applications can be with
Greatly reduce the dosage of inorganic flocculating agent and polyacrylamide, reduce colorful wastewater processing cost and sludge quantity, has fine
Application value, be worth promoting.
Claims (6)
1. a kind of synthetic method of organic polymer decolorization flocculation agent, which is characterized in that specific step is as follows:
A) by 100 parts of dicyandiamides of parts by weight, 10 ~ 50 parts of urea, 50 ~ 100 parts of ammonium chlorides, 1 ~ 10 part of glutamic acid and glycine,
100 ~ 150 parts of formalins are successively put into reactor, stir and slowly heating system is to 30 ~ 40 DEG C, wherein the formaldehyde
The mass concentration of aqueous solution is 37%, and glutamic acid, glycine weight ratio are 1:0.5 ~ 2；
B) stop heating, start to react, system temperature gradually rises, and control reaction temperature carries out at 40 ~ 80 DEG C；
C the formalin with step A formalin equivalent weight, drop are added dropwise) after reacting balance, under same temperature ranges stated
It adds to finish and is warming up to 60 ~ 80 DEG C of insulation reaction 2h, be cooled to room temperature to get finished product, be colorless and transparent thick liquid.
2. the synthetic method of decolorization flocculation agent according to claim 1, it is characterised in that: the organic polymer decolorization flocculation
Agent contain dicyandiamide, urea, ammonium chloride, crosslinking agent, formalin weight ratio be 1:0.1 ~ 0.5:0.5 ~ 1:0.01 ~
0.1:2~3。
3. the synthetic method of decolorization flocculation agent according to claim 1, it is characterised in that: formalin is point 2 equivalent
It is added, is disposably to put into for the first time, is dropwise addition mode for the second time.
4. the synthetic method of decolorization flocculation agent according to claim 1, it is characterised in that: step A) in, it feeds intake and finishes, need
Pre-heating temperature elevation system is to 30 ~ 40 DEG C.
5. the synthetic method of decolorization flocculation agent according to claim 1, it is characterised in that: step B) in, control reaction temperature
It is carried out at 40 ~ 80 DEG C.
6. the synthetic method of decolorization flocculation agent according to claim 1, it is characterised in that: step C) in, heating is added dropwise
To 60 ~ 80 DEG C of insulation reaction 2h.
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| CN201710398514.0A CN107162146B (en) | 2017-05-31 | 2017-05-31 | A kind of synthetic method and application of the agent of organic polymer decolorization flocculation |
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| CN108394973A (en) * | 2018-02-28 | 2018-08-14 | 宜兴市清泰净化剂有限公司 | A kind of preparation method of granule type solid high-efficient decolorizing flocculant |
| CN110713241B (en) * | 2019-09-03 | 2021-12-14 | 西安工程大学 | Organic cationic polyacrylonitrile flocculant and preparation method thereof |
| CN112551668A (en) * | 2020-11-27 | 2021-03-26 | 山东三岳化工有限公司 | Modified dicyandiamide-formaldehyde flocculation decolorizing agent and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101085688A (en) * | 2006-06-08 | 2007-12-12 | 广州格隆环保技术开发有限公司 | Decolorization flocculating agent for printing and dyeing waste water |
| CN102040718A (en) * | 2009-10-23 | 2011-05-04 | 华南理工大学 | Preparation method of decolorizing flocculant |
| CN102476844A (en) * | 2010-11-23 | 2012-05-30 | 彭彦 | Synthetic method of high-efficiency flocculating agent for printing and dyeing waste water |
| CN106241992A (en) * | 2016-09-16 | 2016-12-21 | 淄博鲁瑞精细化工有限公司 | The preparation method of textile printing and dyeing wastewater decolorization flocculation agent |
| CN106430495A (en) * | 2016-12-08 | 2017-02-22 | 上海立昌环境工程股份有限公司 | Preparation method of composite decolorizing flocculating agent for wastewater treatment |
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- 2017-05-31 CN CN201710398514.0A patent/CN107162146B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101085688A (en) * | 2006-06-08 | 2007-12-12 | 广州格隆环保技术开发有限公司 | Decolorization flocculating agent for printing and dyeing waste water |
| CN102040718A (en) * | 2009-10-23 | 2011-05-04 | 华南理工大学 | Preparation method of decolorizing flocculant |
| CN102476844A (en) * | 2010-11-23 | 2012-05-30 | 彭彦 | Synthetic method of high-efficiency flocculating agent for printing and dyeing waste water |
| CN106241992A (en) * | 2016-09-16 | 2016-12-21 | 淄博鲁瑞精细化工有限公司 | The preparation method of textile printing and dyeing wastewater decolorization flocculation agent |
| CN106430495A (en) * | 2016-12-08 | 2017-02-22 | 上海立昌环境工程股份有限公司 | Preparation method of composite decolorizing flocculating agent for wastewater treatment |
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