CN103012222A - Method for preparing naphthalene-based high efficient water reducing agent - Google Patents
Method for preparing naphthalene-based high efficient water reducing agent Download PDFInfo
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- CN103012222A CN103012222A CN2011102891327A CN201110289132A CN103012222A CN 103012222 A CN103012222 A CN 103012222A CN 2011102891327 A CN2011102891327 A CN 2011102891327A CN 201110289132 A CN201110289132 A CN 201110289132A CN 103012222 A CN103012222 A CN 103012222A
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Abstract
The invention discloses a method for preparing a naphthalene-based high efficient water reducing agent. The naphthalene-based high efficient water reducing agent belongs to the field of chemical engineering, and is prepared by using 80 percent of industrial naphthalene, 95 percent of concentrated sulfuric acid, 40 percent of novel environment-friendly formaldehyde, 50 percent of sodium carbonate water solution and water. The preparation method has the advantages that the production process is simple; compared with the traditional process, the purity of the naphthalene is reduced, and the novel environment-friendly formaldehyde is selected, so that the cost and the toxicity are reduced; the product is high in water reducing ratio and high in enhancement effect and can comprehensively improve the physical and mechanical properties of concrete; and a small quantity of the water reducing agent is doped into the concrete, so that the slumps can be increased, the water using amount is reduced, the water cement ratio is reduced, the compression resistance, fracture resistance and tensile strength in the early stage are improved, and the using amount of the cement is saved.
Description
Technical field
Product of the present invention belongs to the chemical building material field, relates in particular to a kind of preparation method of naphthalene series high-efficiency water-reducing agent.
Background technology
Water reducer refers under concrete workability and cement consumption permanence condition, can reduce the mixing water amount, improves concrete strength or under workability and intensity permanence condition, save the admixture of cement consumption.Common several water reducers are in the market: sodium lignin sulfonate water reducer, naphthalene series high-efficiency water-reducing agent, aliphatic high-efficiency water reducing agent, amino high efficiency water reducing agent, high-efficiency water-reducing agent of poly-carboxylic acid etc., naphthalene series high-efficiency water-reducing agent is through the synthetic non-research work of air entrained type high efficiency water reducing agent of chemical industry, main component is the β naphthalene sulfonic acidformaldehyde condensation product, it has very strong dissemination for cement particle, early strong to having, the onsite concrete of high-strength requirement and precast member, good result of use is arranged, can improve comprehensively and improve concrete various performance, be widely used in highway, bridge, water conservancy and industrial and civil architecture etc., its principal feature is: when concrete strength and the slump are basic identical, can reduce cement consumption 15%-20% 1.; 2. when water cement ratio was constant, water-reducing rate can reach 15%-25%; 3. concrete there is significant morning of strong, reinforced effects; 4. improve concrete workability, improve concrete physical and mechanical property comprehensively; 5. good to various cement adaptabilities.Naphthalene water reducer is the high efficiency water reducing agent of the present usage quantity maximum of China, and higher, the not bleed of water-reducing rate during use is little, relative with cement adaptability better on impact time of coagulation, can use with other various composition of concrete admixtures, and price is also relatively cheap.The present invention is a kind of naphthalene series high-efficiency water-reducing agent, produces water reducer as 40% novel environment friendly formaldehyde, 50% aqueous sodium carbonate, water as raw material as 95% the vitriol oil, content as 80% NAPTHALENE FLAKES. (INDUSTRIAL GRADE）, content take content, and wherein NAPTHALENE FLAKES. (INDUSTRIAL GRADE） is main raw material.This preparation method's advantage is: production technique is simple, compare with old technique, and the one, reduced the purity of naphthalene, the 2nd, select novel environment friendly formaldehyde, both reduced cost, have and reduced toxicity.Product is applicable to silicate cement, ordinary Portland cement, Portland blastfurnaceslag cement etc., have water-reducing rate height, reinforced effects good, can improve concrete physical and mechanical property comprehensively, in concrete, mix a small amount of this agent, can increase the slump, reduce water consumption, reduce water cement ratio, improve early stage resistance to compression, anti-folding, tensile strength, saving cement consumption.
Summary of the invention
The problem to be solved in the present invention provides the method that a kind of batch prepares naphthalene series high-efficiency water-reducing agent, this water reducer is take NAPTHALENE FLAKES. (INDUSTRIAL GRADE） as main raw material, produce naphthalene series high-efficiency water-reducing agent take the vitriol oil, novel environment friendly formaldehyde, alkali as auxiliary material, this preparation method's advantage is: production technique is simple, product have water-reducing rate height, reinforced effects good, reduce water consumption, reduce water cement ratio, improve early stage resistance to compression, anti-folding, tensile strength, saving cement consumption, improve the advantages such as concrete physical and mechanical property comprehensively.Producing the raw material that this product uses has: content is that 80% NAPTHALENE FLAKES. (INDUSTRIAL GRADE） 16%-18%, content are that 95% vitriol oil 22%-24%, novel environment friendly formaldehyde 40%, content are that 40% aqueous sodium carbonate 20%, water are an amount of.
The present invention can be achieved through the following technical solutions:
A kind of preparation method of naphthalene series high-efficiency water-reducing agent, its feature is made of following steps:
1. be that 80% NAPTHALENE FLAKES. (INDUSTRIAL GRADE） is sent into chemical reaction kettle with content, improve slowly temperature to 80 ℃-100 ℃, NAPTHALENE FLAKES. (INDUSTRIAL GRADE） changes liquid state into, begin to stir, agitator speed is 15 rev/mins, while stirring temperature is brought up to about 150 ℃, and drip content this moment is 95% the vitriol oil, drip while stirring, time for adding is 2.5 hours.
2. be cooled to about 110 ℃, adding weight is the water of 3 times of NAPTHALENE FLAKES. (INDUSTRIAL GRADE）, stirs.
3. continue to stir, the control temperature is about 95 ℃, slowly novel environment friendly formaldehyde solution is added dropwise to chemical reaction kettle, time for adding is 4.5-6.5 hour, then insulation reaction 2 hours adds 40% aqueous sodium carbonate, about adjust pH to 8, be cooled to the normal temperature discharging, namely get powder-like product after the liquid product that discharging is obtained is spray-dried.
The invention has the beneficial effects as follows: the preparation method that a kind of naphthalene series high-efficiency water-reducing agent is provided, this preparation method's technique is simple, product have water-reducing rate height, reinforced effects good, can improve concrete physical and mechanical property comprehensively, in concrete, mix a small amount of this agent, can increase the slump, reduce water consumption, reduce water cement ratio, improve early stage resistance to compression, anti-folding, tensile strength, saving cement consumption.
Embodiment
Embodiment 1
Be that 9% content is that 16% NAPTHALENE FLAKES. (INDUSTRIAL GRADE） is sent into chemical reaction kettle with accounting for total amount, improve slowly temperature to 80 ℃-100 ℃, NAPTHALENE FLAKES. (INDUSTRIAL GRADE） changes liquid state into, begin to stir, agitator speed is 15 rev/mins, while stirring temperature is brought up to about 150 ℃, and dripping this moment and accounting for total amount is that 24% content is 95% the vitriol oil, drip while stirring, time for adding is 2.5 hours; Be cooled to about 110 ℃, adding weight is the water of 3 times of NAPTHALENE FLAKES. (INDUSTRIAL GRADE）, stirs; Continue to stir, the control temperature is about 95 ℃, to account for slowly total amount and be 40% novel environment friendly formaldehyde solution and be added dropwise to chemical reaction kettle, time for adding is 4.5-6.5 hour, then insulation reaction 2 hours adds that to account for total amount be 20% 40% aqueous sodium carbonate, about adjust pH to 8, be cooled to the normal temperature discharging, namely get powder-like product after the liquid product that discharging is obtained is spray-dried.
Embodiment 2
Be that 9% content is that 17% NAPTHALENE FLAKES. (INDUSTRIAL GRADE） is sent into chemical reaction kettle with accounting for total amount, improve slowly temperature to 80 ℃-100 ℃, NAPTHALENE FLAKES. (INDUSTRIAL GRADE） changes liquid state into, begin to stir, agitator speed is 15 rev/mins, while stirring temperature is brought up to about 150 ℃, and dripping this moment and accounting for total amount is that 23% content is 95% the vitriol oil, drip while stirring, time for adding is 2.5 hours; Be cooled to about 110 ℃, adding weight is the water of 3 times of NAPTHALENE FLAKES. (INDUSTRIAL GRADE）, stirs; Continue to stir, the control temperature is about 95 ℃, to account for slowly total amount and be 40% novel environment friendly formaldehyde solution and be added dropwise to chemical reaction kettle, time for adding is 4.5-6.5 hour, then insulation reaction 2 hours adds that to account for total amount be 20% 40% aqueous sodium carbonate, about adjust pH to 8, be cooled to the normal temperature discharging, namely get powder-like product after the liquid product that discharging is obtained is spray-dried.
Embodiment 3
Be that 9% content is that 18% NAPTHALENE FLAKES. (INDUSTRIAL GRADE） is sent into chemical reaction kettle with accounting for total amount, improve slowly temperature to 80 ℃-100 ℃, NAPTHALENE FLAKES. (INDUSTRIAL GRADE） changes liquid state into, begin to stir, agitator speed is 15 rev/mins, while stirring temperature is brought up to about 150 ℃, and dripping this moment and accounting for total amount is that 22% content is 95% the vitriol oil, drip while stirring, time for adding is 2.5 hours; Be cooled to about 110 ℃, adding weight is the water of 3 times of NAPTHALENE FLAKES. (INDUSTRIAL GRADE）, stirs; Continue to stir, the control temperature is about 95 ℃, to account for slowly total amount and be 40% novel environment friendly formaldehyde solution and be added dropwise to chemical reaction kettle, time for adding is 4.5-6.5 hour, then insulation reaction 2 hours adds that to account for total amount be 20% 40% aqueous sodium carbonate, about adjust pH to 8, be cooled to the normal temperature discharging, namely get powder-like product after the liquid product that discharging is obtained is spray-dried.
Claims (4)
1. the preparation method of a naphthalene series high-efficiency water-reducing agent, it is characterized in that: take content as 80% NAPTHALENE FLAKES. (INDUSTRIAL GRADE） 16%-18%, the vitriol oil 22%-24% of content as 95%, novel environment friendly formaldehyde 40%, content as raw material, obtain finished product by following steps in right amount as 40% aqueous sodium carbonate 20%, water.
2. the preparation method of a kind of naphthalene series high-efficiency water-reducing agent according to claim 1, the feature of its first step is: be that 80% NAPTHALENE FLAKES. (INDUSTRIAL GRADE） is sent into chemical reaction kettle with content, improve slowly temperature to 80 ℃-100 ℃, NAPTHALENE FLAKES. (INDUSTRIAL GRADE） changes liquid state into, begins to stir, and agitator speed is 15 rev/mins, temperature is brought up to about 150 ℃ while stirring, drip content this moment is 95% the vitriol oil, drips while stirring, and time for adding is 2.5 hours.
3. the preparation method of a kind of naphthalene series high-efficiency water-reducing agent according to claim 1, the feature of its second step is: be cooled to about 110 ℃, adding weight is the water of 3 times of NAPTHALENE FLAKES. (INDUSTRIAL GRADE）, stirs.
4. the preparation method of a kind of naphthalene series high-efficiency water-reducing agent according to claim 1, the feature in its 3rd step is: continue to stir, the control temperature is about 95 ℃, slowly novel environment friendly formaldehyde solution is added dropwise to chemical reaction kettle, time for adding is 4.5-6.5 hour, insulation reaction 2 hours, then add 40% aqueous sodium carbonate, about adjust pH to 8, be cooled to the normal temperature discharging, namely get powder-like product after the liquid product that discharging is obtained is spray-dried.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102891327A CN103012222A (en) | 2011-09-27 | 2011-09-27 | Method for preparing naphthalene-based high efficient water reducing agent |
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| CN2011102891327A CN103012222A (en) | 2011-09-27 | 2011-09-27 | Method for preparing naphthalene-based high efficient water reducing agent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106977678A (en) * | 2017-04-21 | 2017-07-25 | 重庆师范大学 | A kind of synthetic method of inexpensive naphthalene series high-efficiency water-reducing agent |
| CN108503254A (en) * | 2018-05-18 | 2018-09-07 | 萧县沃德化工科技有限公司 | A kind of useless rosin in adhesive production process is used for modified naphthalene series water-reducing agent |
| CN108623769A (en) * | 2018-05-18 | 2018-10-09 | 萧县沃德化工科技有限公司 | The method that heavy distillat in ethanol production process prepares modified naphthalene superplasticizer |
| CN111470802A (en) * | 2020-06-11 | 2020-07-31 | 海娇 | Powdery cement water reducing agent and preparation method thereof |
-
2011
- 2011-09-27 CN CN2011102891327A patent/CN103012222A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106977678A (en) * | 2017-04-21 | 2017-07-25 | 重庆师范大学 | A kind of synthetic method of inexpensive naphthalene series high-efficiency water-reducing agent |
| CN108503254A (en) * | 2018-05-18 | 2018-09-07 | 萧县沃德化工科技有限公司 | A kind of useless rosin in adhesive production process is used for modified naphthalene series water-reducing agent |
| CN108623769A (en) * | 2018-05-18 | 2018-10-09 | 萧县沃德化工科技有限公司 | The method that heavy distillat in ethanol production process prepares modified naphthalene superplasticizer |
| CN111470802A (en) * | 2020-06-11 | 2020-07-31 | 海娇 | Powdery cement water reducing agent and preparation method thereof |
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Application publication date: 20130403 |