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Triethanolamine modification method

A triethanolamine modification technology, which is applied in the field of cement grinding aid triethanolamine modification, can solve the problems of high cost, no increase or decrease in cement strength, etc., and achieve the effects of low cost, easy control, and simple method operation

Inactive Publication Date: 2015-09-30
JIANGSU HAIJIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Triethanolamine is a highly polar nonionic surfactant, which is widely used as an industrial raw material in the preparation of cement grinding aids. It can reduce the surface energy of cement particles, reduce particle agglomeration, and promote the improvement of grinding efficiency; It is alkaline in the aqueous solution, which can chelate the metal ions in the cement and interact with the minerals, and promote the early hydration process of the cement, but it has no effect on the later strength of the cement, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A modification method of triethanolamine: 1) Prepare 70% sulfuric acid solution.

[0016] 2) Prepare 90% triethanolamine solution.

[0017] 3) To 10 kg of 90% triethanolamine solution, add 5 kg of 70% sulfuric acid solution dropwise, set up multiple drippers and stir when each dripper is dripping, add 0.3 kg of p-toluenesulfonic acid as a catalyst, and cool down at room temperature naturally.

[0018] 4) Heat to 115 and stir, the reaction time is 5 hours, and cool to room temperature.

Embodiment 2

[0020] A modification method of triethanolamine: 1) glacial acetic acid solution.

[0021] 2) 90% triethanolamine solution.

[0022] 3) To 10 kg of 90% triethanolamine solution, add 4 kg of glacial acetic acid solution dropwise, set up multiple drippers and stir when each dripper is dripping, add 0.3 kg of catalyst p-toluenesulfonic acid, and cool down at room temperature naturally.

[0023] 4) Heat to 133 degrees and stir, the reaction time is 3 hours, and cool to room temperature.

Embodiment 3

[0025] A method for modifying triethanolamine: 1) preparing a glacial acetic acid solution.

[0026] 2) Prepare 80% triethanolamine solution.

[0027] 3) 10 kg of 90% triethanolamine solution, 3.33 kg of glacial acid solution was added dropwise, multiple drippers were set and each dripper was stirred while adding, and a catalyst of 0.3 kg of p-toluenesulfonic acid was added, and the room temperature was naturally cooled.

[0028] 5) Heat to 115 and stir, the reaction time is 5 hours, and cool to room temperature.

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PUM

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Abstract

Triethanolamine is a nonionic surfactant with very high polarity, and is widely used as an industrial raw material in preparation of cement grinding aids. In the prior art, triethanolamine is relatively high in modification cost. By adopting the triethanolamine modification method provided by the invention, the later strength of cement can be improved, the cost is low, and the method is easy to control.

Description

technical field [0001] The invention relates to a method for modifying triethanolamine, in particular to a method for modifying cement grinding aid triethanolamine. Background technique [0002] Triethanolamine is a highly polar nonionic surfactant, which is widely used as an industrial raw material in the preparation of cement grinding aids. It can reduce the surface energy of cement particles, reduce particle agglomeration, and promote the improvement of grinding efficiency; The aqueous solution is alkaline, which can chelate the metal ions in the cement and interact with the minerals, and promote the early hydration process of the cement, but it has no effect on the later strength of the cement, and the cost is high. Contents of the invention [0003] Problems to be solved: Aiming at the above problems, the present invention provides a modification method, which can enhance the strength of cement in the later stage, and is easy to control at low cost. [0004] Technic...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B103/52
Inventor 于旺江
Owner JIANGSU HAIJIAN