High efficiency aliphatic sulfonate water reducing agent and method for preparing same

A technology of aliphatic sulfonate and high-efficiency water reducer, applied in the field of aliphatic sulfonate high-efficiency water reducer and its preparation, can solve the problems of poor adaptability of cement varieties, complicated manufacturing process, and failure to popularize and apply in large quantities. problems, to achieve the effect of good use environment, avoid gelling phenomenon, and good application prospects

Inactive Publication Date: 2005-07-06
吴霖秀 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the late 1970s, my country successfully researched and developed melamine-formaldehyde resin high-efficiency water-reducing agent, but due to its high price, it failed to be popularized and applied in large quantities.
[0003] Since the 1990s, on the one hand, due to the tight supply of industrial naphthalene in my country and the large fluctuations in the price of industrial naphthalene, on the other hand, naphthalene and melamine series have their own performance defects, such as insufficient

Method used

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  • High efficiency aliphatic sulfonate water reducing agent and method for preparing same
  • High efficiency aliphatic sulfonate water reducing agent and method for preparing same
  • High efficiency aliphatic sulfonate water reducing agent and method for preparing same

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Embodiment 1

[0025] The synthetic reactions respectively described in this embodiment and the following embodiments are carried out in a reaction vessel equipped with an electric stirrer, a thermometer, a dropping funnel and a reflux condenser.

[0026] First, put 12.5 moles of water into the reaction vessel, preheat it to 30°C, then add 0.52 moles of anhydrous sodium sulfite to carry out the hydrolysis reaction of the sulfonating agent; then, add 0.96 moles of acetone, and reflux for 30 to 60 minutes; then Add 2.2 moles of formaldehyde with a concentration of 37% to the above solution from the dropping funnel to carry out the carbonylation reaction. The temperature for starting to add formaldehyde is 40-60°C. At the beginning, formaldehyde should be added dropwise slowly, and then gradually increase the speed of adding formaldehyde. After the formaldehyde is added, the temperature of the reaction system is automatically raised to the range of 85-96°C; then heated to 90-110°C, reacted at th...

Embodiment 2

[0028] First, put 8.3 moles of water into the reaction vessel, preheat it to 30°C, then add 0.62 moles of anhydrous sodium sulfite to carry out the hydrolysis reaction of the sulfonating agent; then, add 0.51 moles of cyclohexanone, and reflux for 30 to 60 minutes ; Then drop 0.87 moles of formaldehyde with a concentration of 37% into the above solution from the dropping funnel to carry out the carbonylation reaction. Adding speed; after the formaldehyde is added, the temperature of the reaction system is automatically raised to the range of 85-96°C; then heated to 90-110°C, reacting at this temperature for 2-6 hours, and performing a high-temperature condensation reaction to obtain The amber transparent liquid with a concentration of about 40% is the aliphatic sulfonate superplasticizer.

Embodiment 3

[0030] First, put 11 moles of water into the reaction vessel, preheat it to 30°C, then add 0.67 moles of anhydrous sodium sulfite to carry out the hydrolysis reaction of the sulfonating agent; then, add 0.96 moles of acetone, and reflux for 30 to 60 minutes; then Add 2.23 moles of formaldehyde with a concentration of 37% dropwise from the dropping funnel to the above solution to carry out the carbonylation reaction. The temperature for starting to add formaldehyde is 40-60°C. The formaldehyde should be added dropwise at the beginning, and then gradually increase the speed of adding formaldehyde. After the formaldehyde is added, the temperature of the reaction system is automatically raised to the range of 85-96°C; then heated to 90-110°C, reacted at this temperature for 2-6 hours, and carried out high-temperature condensation reaction to obtain a concentration of 30-40% of the liquid is the aliphatic sulfonate superplasticizer.

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Abstract

The present invention relates to a high efficiency water reducing agent for manufacturing high performance cement based material such as high-strength concrete, fluid state and/or pumping concrete, etc. and method for preparing same. The invention takes ketones compound and aldehydes as condensation monomer, and sulphite as sulphonating agent, and take condensation reaction in alkaline aqueous solution. Then a water-soluble high-polymer condensate containing hydrophilic group such as sulfonic group, carboxy, hydroxyl, etc. in molecule with molecular weight ranging from 3000 to 10000 is obtained. By changing the matching, charging sequence of raw material, the technological process is simplified, the reaction time is shortened, and burst boiling and geling phenomena are also avoided at the same time. By controlling charging rate and condensation temperature, the condensation product is made with required molecular weight and can meet application performance. The fatty group sulphonate condensation compound made by the invention can be served as high efficiency water reducing agent of cement concrete, the water reducing, dispersion and reinforcing effects are better than the traditional albocarbon group high efficiency water reducing agent. The water reducing agent provided by the invention has the advantages of wide raw material source, simple synthesizing process, clean and suitable for industrial production.

Description

technical field [0001] The invention relates to an aliphatic sulfonate high-efficiency water reducer and a preparation method thereof. The composition and molecular structure of this high-efficiency water reducer are different from the previously used naphthalene-based high-efficiency water-reducers and melamine-based high-efficiency water-reducers. Coal water slurry dispersant and oil well water agent drag reducer, etc. Background technique [0002] Since the early 1970s, my country has started research on the synthesis, manufacture and application performance of naphthalene-based high-efficiency water reducers, and has successfully developed UNF-5 and FDN series high-efficiency water reducers (CN1030574, CN1107447), and has been used in construction, hydropower, transportation, and coal mines. and other industries have been widely used. On this basis, considering the limitations of raw materials for industrial naphthalene and refined naphthalene, a high-efficiency water r...

Claims

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Application Information

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IPC IPC(8): C04B24/16C04B24/30
Inventor 吴霖秀王子明武建平裴学东车咚咚
Owner 吴霖秀
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