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Aliphatic concrete water reducing agent and preparation process thereof

A concrete water-reducing agent and a technology for a preparation process, which are applied in the field of aliphatic concrete water-reducing agents, can solve the problems of difficulty in market promotion, high cost of aliphatic water-reducing agents, and high acetone prices, and achieve wide application prospects, short cycle, and high reaction time. smooth effect

Inactive Publication Date: 2009-11-11
JIANGSU NIGAO SCI & TECH +1
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  • Summary
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Problems solved by technology

[0003] One of the main raw materials of aliphatic water reducers is sodium sulfite. Due to the large fluctuations in the market of sodium sulfite and the high price of acetone, another raw material, the cost of produced aliphatic water reducers is relatively high, and it is difficult to promote the market.

Method used

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Embodiment Construction

[0012] The synthesis reaction of this embodiment is carried out in a reaction kettle equipped with a stirrer, a thermometer and a dropping funnel.

[0013] First, add 3000kg of crystalline sodium sulfite and 100kg of sodium metabisulfite into the reaction kettle to heat up; then, under the condition of heating to 50℃~55℃, add 500kg of formaldehyde dropwise to the solution for the first time, and the dropwise addition is completed within 45 minutes , after adding formaldehyde dropwise, keep the solution at 55°C for 1.5 hours; then, under the condition of heating to 45°C~55°C, add acetone dropwise to the solution, and finish dropping within 1.5 hours. The solution was kept at 55°C for 0.5 hours; thereafter, under the condition of heating to 55°C-65°C, formaldehyde was added dropwise to the solution for the second time, and the dropwise addition was completed within 1.5 hours. After the formaldehyde was dropped, the solution was heated to 95°C The temperature is kept at ℃ for 3 h...

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Abstract

The invention discloses a preparation process for an aliphatic concrete water reducing agent. Ketone and aldehyde compounds are used as condensation monomers, crystallized sulphite and pyrosulfite are used as sulfonating agents, and the aliphatic concrete water reducing agent is chemically synthesized in water solution. Waste crystallized sodium sulfite is adopted to replace partial sodium sulfite to produce the aliphatic water reducing agent, so the cost is greatly reduced; and products produced by the preparation process have short cycle, low energy consumption, less input equipment and reduction of environmental pollution.

Description

technical field [0001] The invention relates to an aliphatic concrete water reducing agent and a preparation process thereof. Background technique [0002] The high-efficiency aliphatic water-reducing agent mainly plays the role of improving the slump performance and increasing the strength of concrete. Since today's commercial concrete has high requirements for slump retention performance, the effect of high-efficiency aliphatic water-reducing agents on concrete is becoming more and more important. . [0003] One of the main raw materials of aliphatic water reducers is sodium sulfite. Due to the large fluctuations in the market of sodium sulfite and the high price of acetone, another raw material, the cost of produced aliphatic water reducers is relatively high and it is difficult to promote them in the market. Contents of the invention [0004] In order to overcome the above defects, the technical problem to be solved by the present invention is to provide an aliphatic ...

Claims

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Application Information

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IPC IPC(8): C04B24/16C08G6/02C04B103/30
CPCC04B24/30C04B2103/30
Inventor 王文军陈红根金卫民王道正熊飞邹建东
Owner JIANGSU NIGAO SCI & TECH
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