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Method for preparing aliphatic high efficiency water reducing agent by using industrial by-product and application thereof

A high-efficiency water reducer and by-product technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., to achieve the effect of reducing raw material costs, environmental protection and sustainable development

Inactive Publication Date: 2008-05-28
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the method of using the above-mentioned industrial by-products to manufacture aliphatic superplasticizers and their applications

Method used

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  • Method for preparing aliphatic high efficiency water reducing agent by using industrial by-product and application thereof

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Effect test

Embodiment 1

[0015] 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.

[0016] First, put 340 grams of water in the reaction vessel, heat it to 36°C, then add 118 grams of p-cresol industrial by-product (sodium sulfite content 60%), stir to dissolve and heat up to 55°C for 30 minutes of hydrolysis reaction; subsequently, add 58 grams of acetone, heated to 63 degrees reflux for 60 minutes; then lower the temperature to 40 degrees Celsius, and dropwise add 243 grams of formaldehyde solution with a concentration of 37% to the above solution; after adding formaldehyde, the temperature of the reaction system will automatically rise As high as 85°C, then heated to 95°C, and reacted at this temperature for 4 hours to obtain a brown-red homogeneous liquid with a solid content of about 34.2%.

Embodiment 2

[0018] First, put 426.3 grams of water into the reaction vessel and heat to 30°C, add 178.2 grams of by-products (sodium sulfite content 65%) of the sulfonated phenol production process, and heat to 45°C for hydrolysis for 30 minutes; then add 88 grams of acetone, Reflux reaction at 62°C for 30 minutes; cool down to 55°C and then add 307.5 grams of 36.5% formaldehyde dropwise to the above solution to carry out carbonylation reaction; after adding formaldehyde, the temperature of the reaction system will automatically rise to 90°C; heat up again to 105°C, and reacted at this temperature for 2 hours to obtain a brownish-red liquid with a concentration of about 37%.

Embodiment 3

[0020] Put into the water of 440 grams in the reaction vessel, be heated to 35 ℃, add 118 grams of p-cresol industrial by-products (sodium sulfite content 60%) again, stir and dissolve and carry out hydrolysis reaction 40 minutes; Subsequently, add 58 grams of acetone, be heated to Reflux reaction at 63°C for 60 minutes; then lower the temperature to 50°C and add 343 grams of formaldehyde with a concentration of 37% to the above solution for carbonylation reaction. After adding formaldehyde, the temperature of the reaction system will automatically rise to 88°C and reheat The temperature was raised to 98° C. for 6 hours to obtain a brown-red homogeneous liquid with a solid content of about 37.2%.

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Abstract

The invention relates to a preparation method of an aliphatic high range water reducer applying industry byproduct and the application thereof, which belongs to the field of concrete water reducer. The invention uses the industry byproduct in production of sulfonation-process phenol or the byproduct (Na2SO3 content is 60-85percent) in production of p-cresol and sodium hydrosulfite to produce the aliphatic high range water reducer and takes acetone, formaldehyde, industry byproduct, sulphite or sodium pyrosulfite as raw materials and then sulfonation and condensation reactions are carried out in aqueous medium, the reactant weight ratio is acetone: formaldehyde: sulphite plus industry byproduct: water is equal to 1:2.5-4.5:1.5-2.6:4.0-6.0, the mass concentration of the condensation compound obtained is 30-42 percent, and the viscosity thereof is 20-100m.Pa.S. The product performance of the invention is similar to the common product, but the cost is reduced by 10-20 percent. The invention has environmental protection and waste utilization, can be applied to preparation of various concrete members and production of ready mixed concrete and has good industrialization prospect.

Description

technical field [0001] The present invention relates to a method and its application of using industrial by-products to manufacture aliphatic high-efficiency water-reducers. The aliphatic high-efficiency water-reducers produced by the method can be used as cement concrete admixtures, ceramic and refractory castable dispersants, Coal water slurry dispersant and oil drilling drag reducer. Background technique [0002] Cement concrete admixtures have become the basic components of modern concrete materials. The amount of synthetic concrete admixtures in my country exceeds 1 million tons, and the largest and most important product among various chemical admixtures is concrete water reducer. 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 (CN87104392.0, CN94115574.0), and has been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/08C04B103/30
CPCC04B2103/302C04B24/22C04B2201/10C04B40/0046Y02W30/91
Inventor 王子明王晓丰王亚丽徐远航郝润勤
Owner BEIJING UNIV OF TECH
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