CN105001366A - Environment-friendly corrosion inhibitor and preparation method thereof - Google Patents
Environment-friendly corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN105001366A CN105001366A CN201510510187.4A CN201510510187A CN105001366A CN 105001366 A CN105001366 A CN 105001366A CN 201510510187 A CN201510510187 A CN 201510510187A CN 105001366 A CN105001366 A CN 105001366A
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Abstract
The invention discloses an environment-friendly corrosion inhibitor and a preparation method thereof. The corrosion inhibitor is an anionic polyacrylamide corrosion inhibitor; a polymer which is the same as the anionic polyacrylamide can be obtained by copolymerization of acrylamide and acrylic acid. Meanwhile, polyacrylamides with different anion degrees can be produced by different production technology conditions. The environment-friendly corrosion inhibitor is simple in process, the raw materials are easy to obtain, industrialized production can be realized easily, in addition, the raw materials and the working process have no pollution to the environment, and the environment-friendly corrosion inhibitor is suitable for popularization and application. The environment-friendly corrosion inhibitor prepared by the invention is suitable for treatment of industrial wastewater, steel plant wastewater, electroplating factory wastewater, metallurgy wastewater, coal washing wastewater and the like.
Description
Technical field
The present invention relates to a kind of environment-friendly type inhibiter and preparation method thereof, belong to macromolecule synthesising technology field.
Background technology
Enter the new millennium, the developing direction of World chemical and chemical industry subject there occurs great revolutionary change, and its mark is exactly the proposition of " Green Chemistry " concept.According to the definition of P.T.Anastas etc., Green Chemistry is exactly the techniques and methods with chemistry, fundamentally reduces or eliminate generation and the application of those raw materials to human health or bad environmental, product, by product, solvent and reagent etc.So-called green technology refers to the technology grown up on Green Chemistry basis, is one and brand-new from source, thoroughly stops the chemical technology polluted.It by Environmental capacity at certain level, namely can reduce and eliminates hazardous and noxious substances in the manufacture and application of chemical.It except needs we except process end-of-pipe control refuse, also require that we produce the even zero release of less refuse in the production process of chemical.Design meets inhibiter working condition, the path of strategy, has become the emphasis direction of our naturalist research, and the target of Green Chemistry is exactly the low toxicity, efficient and pollution-free that will realize product and technique, creates an excellent Circular Economy social.As environmentally friendly inhibiter, it should have following characteristics: the product not only requiring it final is nontoxic to environment, harmless, and also should reduce in the synthesis preparation and use procedure of inhibiter the impact of environment as far as possible and reduce production cost, comprise here in the selection of synthesis material, the optimization of processing condition and use procedure and adopt compound synergic technology.From the strategy of sustainable development, according to the concept of Green Chemistry, greenization is undoubtedly the central strategy of 2l century inhibiter development.The greenization of corrosion inhibitor product, the greenization of inhibiter production starting material and conversion reagent, the greenization of inhibiter production reactive mode, the greenization that reaction conditions produced by inhibiter has become natural science applied Frontier and primary study developing way.
Organic amine has good corrosion mitigating effect to iron in an acidic solution, and this is because nitrogen in amine is with positive charge, is thus electrostatically attracted to cathode portion and covers thereon, to suppress hydrogen ion discharge.In amine substance, some atom N have non-covalent electron to (electron pair combined in an acidic solution), and in an acidic solution, it and negative ion coordination, become R
3n:H
+-R
3n:H
+the ion containing positive charge of form, is subject to electrostatic interaction and is attracted on the negative electrode of local, thus this part covered, this agent great advantage is that toxicity is low.Enter ocean containing the residual acid of inhibiter after acid fracturing and freshwater can not work the mischief to environment, and corrosion mitigating effect is better.
Summary of the invention
The present invention aims to provide a kind of environment-friendly type inhibiter and preparation method thereof, and with low cost, safety and environmental protection is applicable to the sewage disposals such as trade effluent, steel plant wastewater, waste water from plating plant, Metallurgical Waste Water, coal washing waste water.
The invention provides a kind of environment-friendly type inhibiter, by acrylamide and unsaturated acid in the aqueous solution, adopt redox system, be polymerized under the effect of chain-transfer agent; Wherein, the mass ratio of acrylamide and unsaturated acid is 1:(2.9-3.2).
Further, the weight proportion of described raw material is: acrylamide: 35 ~ 40 parts, unsaturated carboxylic acid: 95 ~ 110 parts, chain-transfer agent: 0.1 ~ 0.6 part, reductive agent: 0.26 ~ 0.45 part, oxygenant: 0.78 ~ 1.2 part.
Further scheme, by acrylamide and unsaturated acid in the aqueous solution, adopts redox system, is polymerized under the effect of chain-transfer agent; Wherein, the weight proportion of described raw material is: acrylamide: 35 parts, unsaturated carboxylic acid: 95 parts, chain-transfer agent: 0.1 part, reductive agent: 0.26 part, oxygenant: 0.78 part.
Further scheme, by acrylamide and unsaturated acid in the aqueous solution, adopts redox system, is polymerized under the effect of chain-transfer agent; Wherein, the weight proportion of described raw material is: acrylamide: 36 parts, unsaturated carboxylic acid: 98 parts, chain-transfer agent: 0.3 part, reductive agent: 0.30 part, oxygenant: 0.8 part.
Further scheme, by acrylamide and unsaturated acid in the aqueous solution, adopts redox system, is polymerized under the effect of chain-transfer agent; Wherein, the weight proportion of described raw material is: acrylamide: 38 parts, unsaturated carboxylic acid: 105 parts, chain-transfer agent: 0.5 part, reductive agent: 0.4 part, oxygenant: 1.1 parts.
Further scheme, by acrylamide and unsaturated acid in the aqueous solution, adopts redox system, is polymerized under the effect of chain-transfer agent; Wherein, the weight proportion of described raw material is: acrylamide: 40 parts, unsaturated carboxylic acid: 110 parts, chain-transfer agent: 0.6 part, reductive agent: 0.45 part, oxygenant: 1.2 parts.
In such scheme, described unsaturated acid comprises one or more in vinylformic acid, methacrylic acid, methylene-succinic acid, maleic anhydride.
In such scheme, described oxygenant comprises one or more in hydrogen peroxide, ammonium persulphate, Potassium Persulphate, Sodium Persulfate, and oxygenant consumption is the 0.6%-0.8% of acrylamide and unsaturated acid gross weight.
In such scheme, described reductive agent comprises one or more in xitix, rongalite, sodium bisulfite, sodium hypophosphite, vitamins C, and the consumption of reductive agent is the 0.2%-0.3% of acrylamide and unsaturated acid gross weight.
In such scheme, described chain-transfer agent comprises one or more in Thiovanic acid, thiohydracrylic acid, methylpropene sodium sulfonate, Virahol.
The invention provides a kind of preparation method of environment-friendly type inhibiter, it is characterized in that: comprise the following steps:
(1) by acrylamide 35 ~ 40 weight part, unsaturated carboxylic acid 95 ~ 110 weight part is dissolved in deionized water and is mixed with mixed solution 300 ~ 400 weight part that weight ratio is 30% ~ 40%, for subsequent use, is A liquid;
(2) by chain-transfer agent 0.1 ~ 0.6 weight part, reductive agent 0.26 ~ 0.45 weight part is dissolved in deionized water and is mixed with mixed solution 30 ~ 50 weight part that weight ratio is 1.0% ~ 2.0%, for subsequent use, is B liquid;
(3) first in reactor, add deionized water 400 ~ 500 weight part and oxygenant 0.78 ~ 1.2 weight part, stir and make it even, be warming up to 50 ~ 55 DEG C;
(4) drip A, B liquid, A liquid time for adding is 2.5h ~ 3h, B liquid time for adding is 3.2 ~ 3.5h, and the solution temperature keeping reaction system during dropping is 50 DEG C ~ 55 DEG C, continues insulation 1h ~ 1.5h after dropping;
(5) temperature of reaction system is cooled to less than 40 DEG C, environment-friendly type inhibiter can be obtained.
Molecular size range and the backbone length of the present invention by regulating the consumption of redox initiator and ratio to regulate inhibiter, make the inhibiter application surface that is synthesized wider.
Present invention process is simple, and raw materials is easy to get, and is easy to realize suitability for industrialized production, and starting material and production process environmentally safe, be suitable for applying.Gained anion-polyacrylamide inhibiter of the present invention is applicable to the sewage disposals such as trade effluent, steel plant wastewater, waste water from plating plant, Metallurgical Waste Water, coal washing waste water.
Embodiment
Further illustrate the present invention below by embodiment, but be not limited to following examples.
embodiment 1:
A preparation method for environment-friendly type inhibiter, the present embodiment chooses following raw material: acrylamide: 35g, unsaturated carboxylic acid: 95g, chain-transfer agent: 0.1g, reductive agent: 0.26g, oxygenant: 0.78g.
Concrete preparation process is:
(1) solution A is prepared: solution A is made up of vinylformic acid 95g, acrylamide 35g and deionized water 250g;
(2) B solution is prepared: B solution is made up of thiohydracrylic acid 0.1g, vitamins C 0.26g, deionized water 35g;
(3) in the four-hole boiling flask that stirrer, peristaltic pump are housed, load deionized water 400g be then warmed up to 50 DEG C and then add hydrogen peroxide 0.78g, stir and start to drip solution A and B solution with peristaltic pump after being warming up to 55 DEG C.
(4) solution A time for adding is 3 hours, and B solution time for adding is 3.5 hours, is incubated 1 hour, then cools to less than 40 DEG C, namely obtain environment-friendly type inhibiter after dropwising at 55 DEG C.
embodiment 2
A preparation method for environment-friendly type inhibiter, the present embodiment chooses following raw material: acrylamide: 36 parts, unsaturated carboxylic acid: 98 parts, chain-transfer agent: 0.3 part, reductive agent: 0.30 part, oxygenant: 0.8 part.
Concrete preparation process is:
(1) solution A is prepared: solution A is by vinylformic acid 46g, methacrylic acid 52g, acrylamide: make with deionized water 250g for 36 parts;
(2) B solution is prepared: B solution is made up of Thiovanic acid 0.3g, xitix 0.3g, deionized water 35g;
(3) in the four-hole boiling flask that stirrer, peristaltic pump are housed, load deionized water 400g be then warmed up to 50 DEG C and then add ammonium persulphate 0.8g, stir and start to drip solution A and B solution with peristaltic pump after being warming up to 55 DEG C.
(4) solution A time for adding is 2.5 hours, and B solution time for adding is 3.3 hours, is incubated 1.2 hours, then cools to less than 40 DEG C, namely obtain environment-friendly type inhibiter after dropwising at 55 DEG C.
embodiment 3
A preparation method for environment-friendly type inhibiter, the present embodiment chooses following raw material: acrylamide: 38 parts, unsaturated carboxylic acid: 105 parts, chain-transfer agent: 0.5 part, reductive agent: 0.4 part, oxygenant: 1.1 parts.
Concrete preparation process is:
(1) solution A is prepared: solution A is made up of methylene-succinic acid 105g, acrylamide 38g and deionized water 250g;
(2) B solution is prepared: B solution is made up of methylpropene sodium sulfonate 0.5g, rongalite 0.4g, deionized water 35g;
(3) in the four-hole boiling flask that stirrer, peristaltic pump are housed, load deionized water 400g be then warmed up to 50 DEG C and then add Potassium Persulphate 1.1g, stir and start to drip solution A and B solution with peristaltic pump after being warming up to 52 DEG C.
(4) solution A time for adding is 2.8 hours, and B solution time for adding is 3.5 hours, is incubated 1.2 hours, then cools to less than 40 DEG C, namely obtain environment-friendly type inhibiter after dropwising at 55 DEG C.
embodiment 4
A preparation method for environment-friendly type inhibiter, the present embodiment chooses following raw material: acrylamide: 40 parts, unsaturated carboxylic acid: 110 parts, chain-transfer agent: 0.6 part, reductive agent: 0.45 part, oxygenant: 1.2 parts.
Concrete preparation process is:
(1) solution A is prepared: solution A is made up of maleic anhydride 110g, acrylamide 40g and deionized water 250g;
(2) B solution is prepared: B solution is made up of Virahol 0.6g, sodium bisulfite 0.45g, deionized water 35g;
(3) in the four-hole boiling flask that stirrer, peristaltic pump are housed, load deionized water 400g be then warmed up to 50 DEG C and then add Sodium Persulfate 1.2g, stir and start to drip solution A and B solution with peristaltic pump after being warming up to 53 DEG C.
(4) solution A time for adding is 2.8 hours, and B solution time for adding is 3.3 hours, is incubated 1.0 hours, then cools to less than 40 DEG C, namely obtain environment-friendly type inhibiter after dropwising at 55 DEG C.
corrosion test
Carbon steel print C1018 is used in this corrosion test.By print sonication 10 minutes in acetone, then dry in heating container, cool in moisture eliminator and weigh.They are hung in the polypropylene strips in the assay flask of the inhibiter that acid and interpolation are housed.With plastic film, bottle sealing is evaporated to prevent acid.Assay flask is placed on magnetic stirring apparatus and prevents solution internal diffusion gradient.After 3 days, steel print is taken out from bottle and uses warm water and acetone rinsing, then that it is dry in heating container, cool in moisture eliminator and weigh.All tests all repeat twice, provide average corrosion rate.
Use following equation by weight loss determination corrosion rate CR (mm/) of steel print
ρ
steel=7.718g/cm
3
Surface-area=27.2cm
2(surface-area 27.2cm all made by carbon steel sample
2)
The result of different tests is shown in following table 1.
The sulfonated lignin inhibiter Performance comparision that table 1, embodiment sample and traditional industry use
| Implement sample | Corrosion rate/mm/ |
| 50% lignosulfonate solutions-50% formic acid (85%) | 2.7 |
| (embodiment one) 50% inhibiter-50% formic acid (85%) | 1.4 |
| (embodiment two) 50% inhibiter-50% formic acid (85%) | 1.5 |
| (embodiment three) 50% inhibiter-50% formic acid (85%) | 1.7 |
| (embodiment four) 50% inhibiter-50% formic acid (85%) | 1.3 |
The sulfonated lignin inhibiter performance of our inhibiter performance data of obtaining and industrial use is suitable as can be seen from the above table.
In sum, environment-friendly type inhibiter provided by the invention can play corrosion inhibition effectively at steel surface.
Claims (10)
1. an environment-friendly type inhibiter, described inhibiter is anion-polyacrylamide inhibiter, it is characterized in that: by acrylamide and unsaturated acid in the aqueous solution, adopts redox system, is polymerized under the effect of chain-transfer agent; Wherein, the weight proportion of described raw material is: acrylamide: 35 ~ 40 parts, unsaturated carboxylic acid: 95 ~ 110 parts, chain-transfer agent: 0.1 ~ 0.6 part, reductive agent: 0.26 ~ 0.45 part, oxygenant: 0.78 ~ 1.2 part.
2. a kind of environment-friendly type inhibiter according to claim 1, is characterized in that: by acrylamide and unsaturated acid in the aqueous solution, adopts redox system, is polymerized under the effect of chain-transfer agent; Wherein, the weight proportion of described raw material is: acrylamide: 35 parts, unsaturated carboxylic acid: 95 parts, chain-transfer agent: 0.1 part, reductive agent: 0.26 part, oxygenant: 0.78 part.
3. a kind of environment-friendly type inhibiter according to claim 1, is characterized in that: by acrylamide and unsaturated acid in the aqueous solution, adopts redox system, is polymerized under the effect of chain-transfer agent; Wherein, the weight proportion of described raw material is: acrylamide: 36 parts, unsaturated carboxylic acid: 98 parts, chain-transfer agent: 0.3 part, reductive agent: 0.30 part, oxygenant: 0.8 part.
4. a kind of environment-friendly type inhibiter according to claim 1, is characterized in that: by acrylamide and unsaturated acid in the aqueous solution, adopts redox system, is polymerized under the effect of chain-transfer agent; Wherein, the weight proportion of described raw material is: acrylamide: 38 parts, unsaturated carboxylic acid: 105 parts, chain-transfer agent: 0.5 part, reductive agent: 0.4 part, oxygenant: 1.1 parts.
5. a kind of environment-friendly type inhibiter according to claim 1, is characterized in that: by acrylamide and unsaturated acid in the aqueous solution, adopts redox system, is polymerized under the effect of chain-transfer agent; Wherein, the weight proportion of described raw material is: acrylamide: 40 parts, unsaturated carboxylic acid: 110 parts, chain-transfer agent: 0.6 part, reductive agent: 0.45 part, oxygenant: 1.2 parts.
6. a kind of environment-friendly type inhibiter according to claim 1-5, is characterized in that: described unsaturated acid comprises one or more in vinylformic acid, methacrylic acid, methylene-succinic acid, maleic anhydride.
7. a kind of environment-friendly type inhibiter according to claim 1-5, it is characterized in that: described oxygenant comprises one or more in hydrogen peroxide, ammonium persulphate, Potassium Persulphate, Sodium Persulfate, oxygenant consumption is the 0.6%-0.8% of acrylamide and unsaturated acid gross weight.
8. a kind of environment-friendly type inhibiter according to claim 1-5, it is characterized in that: described reductive agent comprises one or more in xitix, rongalite, sodium bisulfite, sodium hypophosphite, vitamins C, the consumption of reductive agent is the 0.2%-0.3% of acrylamide and unsaturated acid gross weight.
9. a kind of environment-friendly type inhibiter according to claim 1-5, is characterized in that: described chain-transfer agent comprises one or more in Thiovanic acid, thiohydracrylic acid, methylpropene sodium sulfonate, Virahol.
10. the preparation method of a kind of environment-friendly type inhibiter according to claim 1-9, is characterized in that: comprise the following steps:
(1) by acrylamide 35 ~ 40 weight part, unsaturated carboxylic acid 95 ~ 110 weight part is dissolved in deionized water and is mixed with mixed solution 300 ~ 400 weight part that weight ratio is 30% ~ 40%, for subsequent use, is A liquid;
(2) by chain-transfer agent 0.1 ~ 0.6 weight part, reductive agent 0.26 ~ 0.45 weight part is dissolved in deionized water and is mixed with mixed solution 30 ~ 50 weight part that weight ratio is 1.0% ~ 2.0%, for subsequent use, is B liquid;
(3) first in reactor, add deionized water 400 ~ 500 weight part and oxygenant 0.78 ~ 1.2 weight part, stir and make it even, be warming up to 50 ~ 55 DEG C;
(4) drip A, B liquid, A liquid time for adding is 2.5h ~ 3h, B liquid time for adding is 3.2 ~ 3.5h, and the solution temperature keeping reaction system during dropping is 50 DEG C ~ 55 DEG C, continues insulation 1h ~ 1.5h after dropping;
(5) temperature of reaction system is cooled to less than 40 DEG C, environment-friendly type inhibiter can be obtained.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017211563A1 (en) | 2016-06-07 | 2017-12-14 | Tougas Oilfield Solutions Gmbh | Method for inhibiting metal corrosion in oil and natural gas production |
| WO2018077743A2 (en) | 2016-10-31 | 2018-05-03 | Tougas Oilfield Solutions Gmbh | Method for enhancing metal corrosion inhibition in oil and natural gas production |
| CN115057541A (en) * | 2022-07-13 | 2022-09-16 | 安徽贝迪环保科技有限公司 | Efficient scale and corrosion inhibitor for circulating water |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789297A (en) * | 2004-12-13 | 2006-06-21 | 大连广汇化学有限公司 | Preparation method of high molecular weight amphoteric high molecule |
| EP1719784A1 (en) * | 2005-05-06 | 2006-11-08 | National Starch and Chemical Investment Holding Corporation | alcohol compatible copolymer |
| CN103613705A (en) * | 2013-10-21 | 2014-03-05 | 青岛三力本诺化学工业有限公司 | Preparation method for nonionic polyacrylamide |
| CN105001365A (en) * | 2015-08-05 | 2015-10-28 | 山西科腾环保科技有限公司 | Anionic polyacrylamide corrosion inhibitor and preparing method thereof |
-
2015
- 2015-08-19 CN CN201510510187.4A patent/CN105001366A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789297A (en) * | 2004-12-13 | 2006-06-21 | 大连广汇化学有限公司 | Preparation method of high molecular weight amphoteric high molecule |
| EP1719784A1 (en) * | 2005-05-06 | 2006-11-08 | National Starch and Chemical Investment Holding Corporation | alcohol compatible copolymer |
| CN103613705A (en) * | 2013-10-21 | 2014-03-05 | 青岛三力本诺化学工业有限公司 | Preparation method for nonionic polyacrylamide |
| CN105001365A (en) * | 2015-08-05 | 2015-10-28 | 山西科腾环保科技有限公司 | Anionic polyacrylamide corrosion inhibitor and preparing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017211563A1 (en) | 2016-06-07 | 2017-12-14 | Tougas Oilfield Solutions Gmbh | Method for inhibiting metal corrosion in oil and natural gas production |
| WO2018077743A2 (en) | 2016-10-31 | 2018-05-03 | Tougas Oilfield Solutions Gmbh | Method for enhancing metal corrosion inhibition in oil and natural gas production |
| CN115057541A (en) * | 2022-07-13 | 2022-09-16 | 安徽贝迪环保科技有限公司 | Efficient scale and corrosion inhibitor for circulating water |
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