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Polyolamine ester and its synthesis method and use

A technology of polyol amine ester and polyol amine is applied in the fields of cement admixtures, cement grinding aid production, and amine ester compounds, which can solve the problems of insignificant enhancement, restricting the development of grinding aids, etc., so as to improve compatibility The effect of improving the strength of cement and prolonging the action time

Inactive Publication Date: 2015-01-28
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Triethanolamine can promote the dissolution of calcium phase, aluminum phase and iron phase in cement, thereby promoting the C in cement clinker 3 A.C 4 The hydration of minerals such as AF can improve the early strength of cement. However, triethanolamine also has some application disadvantages that affect the quality of cement. The main ones are: (1) The later strengthening effect is not obvious
[0004] Most of the problems in the use of cement grinding aids are caused by triethanolamine. The disadvantages of triethanolamine have restricted the development of grinding aids.

Method used

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  • Polyolamine ester and its synthesis method and use
  • Polyolamine ester and its synthesis method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 149g of triethanolamine, 40g of propionic acid (the molar ratio of hydroxyl and carboxyl groups is 6:1) and 0.2g of p-toluenesulfonic acid in the reaction kettle successively, at a temperature of 110°C, using toluene as a water-carrying agent, through condensation Water separating agent and water separating agent were used to remove water, and after reacting for 5 hours, potassium hydroxide solution was added to adjust the pH value to neutral to obtain polyol amine ester A1. Infrared spectroscopic analysis was carried out on A1, as figure 1 As shown, it can be seen that there is an obvious strong peak at 1726cm-1, and the distribution is narrow, which belongs to the stretching vibration peak of the ester group, which indicates that the target group-ester group has been obtained in A1.

Embodiment 2

[0027] 191g of triisopropanolamine, 90g of oxalic acid (the molar ratio of hydroxyl and carboxyl groups is 3:1) and 3.9g of concentrated sulfuric acid are successively added into the reaction kettle. Remove water with water separator, react for 2 hours, add potassium hydroxide solution to adjust pH value to neutral, and obtain polyol amine ester A2.

Embodiment 3

[0029] Add 210g of diethanolamine, 118g of succinic acid (the molar ratio of hydroxyl to carboxyl group is 2:1) and 5.4g of concentrated hydrochloric acid in the reaction kettle successively. Water was removed from the aqueous solution, and after reacting for 10 hours, ethylenediamine was added to adjust the pH value to neutral to obtain A3.

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Abstract

The invention discloses a polyolamine ester and its synthesis method and use and belongs to the technical field of amine ester compounds. Under the action of a catalyst, according to a mole ratio of hydroxyl to carboxyl of more than 1: 1, a polyolamine and an organic acid as raw materials are added with a water carrying agent and the mixture undergoes a reaction at a temperature of 60-150 DEG C for 2-10h to produce the polyolamine ester. The polyolamine ester as a cement additive is added into cement so that cement curing time and fluidity of cement paste are not influenced, strength of the cement of all ages is improved, performances are stable, a cost is low, an effective doping amount is low and an application prospect is wide.

Description

technical field [0001] The invention relates to a synthesis method of polyol amine ester and its application, which belongs to the technical field of amine ester compounds, can be applied to the technical field of cement admixtures, and especially belongs to the production field of cement grinding aids. Background technique [0002] Cement concrete is the most widely used building material in modern times, and it is also the largest man-made material at present. In 2013, my country's total cement output reached 2.4 billion tons. The cement production process consumes a lot of energy and emits a lot of carbon. For every ton of cement clinker produced, about 1 ton of CO is emitted. 2 , so energy saving and emission reduction has always been the goal pursued by the cement industry. Adding a small amount of grinding aids in cement production can not only effectively reduce the energy consumption of cement production, but also increase the strength of cement. Therefore, adding c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C213/06C07C219/06C07C219/08C04B24/12
Inventor 王剑锋唐官保崔素萍杨松格兰明章王子明王亚丽
Owner BEIJING UNIV OF TECH
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