CN102992681A - Production method of high-efficiency aliphatic water-reducing agent - Google Patents
Production method of high-efficiency aliphatic water-reducing agent Download PDFInfo
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- CN102992681A CN102992681A CN201210298393XA CN201210298393A CN102992681A CN 102992681 A CN102992681 A CN 102992681A CN 201210298393X A CN201210298393X A CN 201210298393XA CN 201210298393 A CN201210298393 A CN 201210298393A CN 102992681 A CN102992681 A CN 102992681A
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Abstract
The invention discloses a production method of a high-efficiency aliphatic water-reducing agent. The high-efficiency aliphatic water-reducing agent is prepared from water, sodium sulfite, acetone and formaldehyde in a reactor. The method includes the steps of: mixing two fifths of formaldehyde and acetone with 30-40% by weight of sodium sulfite to obtain a mixed liquid; dissolving remnant sodium sulfite and acetone into water in the reactor under stirring; then adding another two fifths of formaldehyde; dropwise adding the mixed liquid into the reactor at the temperature of 55-65 DEG C; dropwise adding the remnant one fifth of formaldehyde quickly after the above dropwise adding operation is finished, and reacting for 1-2 hours at the temperature of 95-100 DEG C; and reducing the temperature to be below 50 DEG C after reaction. The prepared product has the advantages of light color, high water-reducing rate, good slump loss resistant property, and good adaptability to different kinds of cements.
Description
Technical field
The present invention relates to a kind of production method of water reducer, be specifically related to a kind of production method of aliphatic high-efficiency water reducing agent.
Background technology
Aliphatic water reducing agent is the burnt aldehyde of the synthetic carbonyl of acetone sulfonation.The hydrophobic group main chain is aliphatic hydrocarbon, is a kind of green high-efficient water reducer.Free from environmental pollution, do not damage HUMAN HEALTH.Wide to the cement suitability, obvious to the concrete reinforced effects, little loss of slump, low temperature is without the sulfate crystal phenomenon, be widely used in all kinds of personalized water reducers such as preparation pumping agent, slow setting, early strong, antifreeze, bleed, also can with naphthalene water reducer, amino water reducer, polycarboxylate water-reducer compound use.
Existing production technique mostly adopts and slowly drips formaldehyde, needs strictly to control rate of addition in the dropping process, prevents that excessive velocities from acutely maybe can't react whole condensation reaction, and therefore the cycle of reaction is longer.The product colour that obtains simultaneously is dark, reacts abundant not.
Summary of the invention
To the objective of the invention is the defective that exists in the prior art in order solving, the production method of aliphatic water reducing agent of a kind of reaction time of short and sufficient reacting to be provided.
In order to achieve the above object, the invention provides a kind of production method of aliphatic high-efficiency water reducing agent, the method prepares in reactor by raw water, S-WAT, acetone and formaldehyde; May further comprise the steps:
(1) mixed solution is prefabricated: respectively get 2/5ths formaldehyde and acetone, and the S-WAT of 30-40% mixes, and for subsequent use; The preferred proportion of S-WAT is 40%.
(2) in reactor, under stirring, that remaining S-WAT and acetone is soluble in water; Then add other 2/5ths formaldehyde; Under 55 ℃～65 ℃, in reactor, drip prefabricated mixed solution in the step (1); After dropwising, drip rapidly the formaldehyde of residue 1/5th, keep 95 ℃～100 ℃ reactions 1～2 hour;
(3) after reaction is finished, be cooled to below 50 ℃ and get final product.
Wherein, the mol ratio of water, S-WAT, acetone and formaldehyde is 9-17:0.5-1.5:1:1.5-2.5.
The adding speed of 1/5th formaldehyde that at first add in the step (2) is 60-100L/min; Then the rate of addition of mixed solution is 10-40/s; The rate of addition of last 1/5th formaldehyde is 100-150/s.
After dripping the formaldehyde of residue 1/5th in the step (2), keeping temperature of reaction is 95 ℃ of reaction 2h.
The present invention has the following advantages compared to existing technology: by the preparation mixed solution, part formaldehyde is dissolved in acetone and the S-WAT in advance, simultaneously residual formaldehyde is divided into two sections addings, so that reaction is more abundant, the product performance that make are more superior.The reaction time of aliphatic high-efficiency water reducing agent of the present invention short (being about 7h), products obtained therefrom is of light color, and water-reducing rate is high, and the guarantor is collapsed effective, and different cement are had preferably adaptability.
Embodiment
Be elaborated below in conjunction with the production method of specific embodiment to aliphatic water reducing agent of the present invention.
Embodiment one
Mixed solution is prefabricated: gets formaldehyde 1400L, acetone 500L and S-WAT 576kg and mixes, and for subsequent use.
In the reactor with reflux exchanger, under stirring acetone 750L and S-WAT 1350kg are dissolved in the water of 4200L, then add formaldehyde 1400L, the adding speed control is 60L/min.After adding is finished, be warming up to about 55 ℃; Then drip prefabricated mixed solution, rate of addition is controlled to be 10/s, and controlling simultaneously temperature of reaction is about 55 ℃; After mixed solution dropwises, drip fast formaldehyde 700L, rate of addition is controlled to be 100/s, and temperature of reaction rises to 95 ℃, insulation 2h.
After reaction is finished, be cooled to 50 ℃ and get product.
Embodiment two
Mixed solution is prefabricated: gets formaldehyde 1400L, acetone 520L and S-WAT 590kg and mixes, and for subsequent use.
In the reactor with reflux exchanger, under stirring acetone 780L and S-WAT 890kg are dissolved in the water of 4200L, then add formaldehyde 1400L, the adding speed control is 100L/min.After adding is finished, be warming up to about 55 ℃; Then drip prefabricated mixed solution, rate of addition is controlled to be 40/s, and controlling simultaneously temperature of reaction is about 65 ℃; After mixed solution dropwises, drip fast formaldehyde 700L, rate of addition is controlled to be 150/s, and temperature of reaction rises to 100 ℃, insulation 1h.
After reaction is finished, be cooled to 50 ℃ and get product.
Claims (5)
1. the production method of an aliphatic high-efficiency water reducing agent, the method prepares in reactor by raw water, S-WAT, acetone and formaldehyde; It is characterized in that, may further comprise the steps:
(1) mixed solution is prefabricated: respectively get 2/5ths formaldehyde and the S-WAT of acetone and 30-40% and mix, and for subsequent use;
(2) in reactor, under stirring, that remaining S-WAT and acetone is soluble in water; Then add other 2/5ths formaldehyde; Under 55 ℃～65 ℃, in reactor, drip prefabricated mixed solution in the step (1); After dropwising, drip rapidly the formaldehyde of residue 1/5th, keep 95 ℃～100 ℃ reactions 1～2 hour;
(3) after reaction is finished, be cooled to below 50 ℃ and get final product.
2. the production method of aliphatic high-efficiency water reducing agent according to claim 1 is characterized in that, the add-on of S-WAT accounts for 2/5ths of S-WAT total amount in described step (1) mixed solution.
3. the production method of aliphatic high-efficiency water reducing agent according to claim 1 and 2 is characterized in that, the mol ratio of described water, S-WAT, acetone and formaldehyde is 9-17:0.5-1.5:1:1.5-2.5.
4. the production method of aliphatic high-efficiency water reducing agent according to claim 1 and 2 is characterized in that, the adding speed of 1/5th formaldehyde that at first add in the described step (2) is 60-100L/min; Then the rate of addition of mixed solution is 10-40/s; The rate of addition of last 1/5th formaldehyde is 100-150/s.
5. the production method of aliphatic high-efficiency water reducing agent according to claim 1 and 2 is characterized in that, drip residue 1/5th formaldehyde in the described step (2) after, keeping temperature of reaction is 95 ℃ of reaction 2h.
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| CN201210298393.XA CN102992681B (en) | 2012-08-21 | 2012-08-21 | Production method of high-efficiency aliphatic water-reducing agent |
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| CN201210298393.XA CN102992681B (en) | 2012-08-21 | 2012-08-21 | Production method of high-efficiency aliphatic water-reducing agent |
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| CN102992681B CN102992681B (en) | 2014-01-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103588407A (en) * | 2013-11-01 | 2014-02-19 | 江苏百瑞吉新材料有限公司 | Modified aliphatic high-efficiency water reducing agent and preparation method thereof |
| CN103951306A (en) * | 2014-04-11 | 2014-07-30 | 福清市永春混凝土外加剂有限公司 | Modified aliphatic water reducer and preparation method thereof |
| CN106396456A (en) * | 2016-08-26 | 2017-02-15 | 河南科之杰新材料有限公司 | Preparation method of aliphatic powdery water reducing agent |
| CN113105597A (en) * | 2021-04-06 | 2021-07-13 | 杭州邦利建材有限公司 | Preparation process of aliphatic water reducer |
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| CN101624269A (en) * | 2009-08-03 | 2010-01-13 | 常州汇迪建材有限公司 | Aliphatic series high-efficiency water reducing agent and preparation method thereof |
| CN101717480A (en) * | 2009-11-13 | 2010-06-02 | 济南京科工贸有限公司 | Preparing method of heating-free aliphatic superplasticizer admixture |
| CN102633965A (en) * | 2012-05-07 | 2012-08-15 | 昆明理工大学 | Synthetic method of aliphatic-series sulfonate high-efficiency water reducer |
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| CN101624269A (en) * | 2009-08-03 | 2010-01-13 | 常州汇迪建材有限公司 | Aliphatic series high-efficiency water reducing agent and preparation method thereof |
| CN101717480A (en) * | 2009-11-13 | 2010-06-02 | 济南京科工贸有限公司 | Preparing method of heating-free aliphatic superplasticizer admixture |
| CN102633965A (en) * | 2012-05-07 | 2012-08-15 | 昆明理工大学 | Synthetic method of aliphatic-series sulfonate high-efficiency water reducer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588407A (en) * | 2013-11-01 | 2014-02-19 | 江苏百瑞吉新材料有限公司 | Modified aliphatic high-efficiency water reducing agent and preparation method thereof |
| CN103951306A (en) * | 2014-04-11 | 2014-07-30 | 福清市永春混凝土外加剂有限公司 | Modified aliphatic water reducer and preparation method thereof |
| CN106396456A (en) * | 2016-08-26 | 2017-02-15 | 河南科之杰新材料有限公司 | Preparation method of aliphatic powdery water reducing agent |
| CN106396456B (en) * | 2016-08-26 | 2018-07-03 | 河南科之杰新材料有限公司 | A kind of preparation method of aliphatic powder water-reducing agent |
| CN113105597A (en) * | 2021-04-06 | 2021-07-13 | 杭州邦利建材有限公司 | Preparation process of aliphatic water reducer |
| CN113105597B (en) * | 2021-04-06 | 2022-11-29 | 杭州邦利建材有限公司 | Preparation process of aliphatic water reducer |
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| CN102992681B (en) | 2014-01-15 |
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