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Triethanolamine-modified cement grinding aid and preparation method thereof

A technology of cement grinding aid and triethanolamine, which is applied in the field of triethanolamine modified cement grinding aid and its preparation, can solve the problems of high cost, reduced strength, high price of triethanolamine, etc., to reduce surface energy, improve fluidity, The effect of increasing the output per hour

Inactive Publication Date: 2019-10-01
NANJING YONGNENG MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Triethanolamine is a highly polar alkanolamine. The aqueous solution is alkaline and can chelate metal ions in cement to interact with minerals. It was used as a concrete early-strength agent in the early stage, which can quickly increase the early strength of cement, but it will cause Later strength decreased
[0003] As a cement grinding aid, triethanolamine is usually used in combination with other components, which has a certain grinding aid effect on cement grinding, but the price of triethanolamine is relatively high, which makes the cost of triethanolamine-based cement grinding aids relatively high

Method used

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  • Triethanolamine-modified cement grinding aid and preparation method thereof

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Effect test

Embodiment 1

[0023] A kind of triethanolamine modified cement grinding aid, its raw material is composed of: modified glycerin-sulfated-triethanolamine 5%, sodium acetate 5%, molasses 3%, sodium thiosulfate 11%, balance is water, The total amount is 100%; said percentages are mass percentages. Its preparation of described modified triethanolamine comprises the following steps:

[0024] Reaction with triethanolamine, ammonium sulfate and glycerol with a molar ratio of 1:1:1: add triethanolamine (55g, 0.36mol), ammonium sulfate (47.6g, 0.36mol) and glycerol (33g, 0.36mol) in a three-neck round bottom flask ) stirring, add the catalyst before heating up, add the catalyst concentrated sulfuric acid (5% of the total mass of the reactant) 6.78g slowly dropwise, heat to 80°C, after the 5h reaction finishes, cool down and remove moisture by distillation under reduced pressure to obtain modified glycerin-sulfuric acid Esterification - modified triethanolamine.

[0025] The percentages are all per...

Embodiment 2

[0027] A kind of triethanolamine modified cement grinding aid, its raw material is composed of: modified glycerin-sulfated-triethanolamine 10%, sodium acetate 7%, molasses 4%, sodium thiosulfate 15%, balance is water, The total amount is 100%; said percentages are mass percentages. Its preparation of described modified triethanolamine comprises the following steps:

[0028] Reaction with triethanolamine, ammonium sulfate and glycerol with a molar ratio of 1:1:1: add triethanolamine (55g, 0.36mol), ammonium sulfate (47.6g, 0.36mol) and glycerol (33g, 0.36mol) in a three-neck round bottom flask ) stirring, add catalyst before heating up, add catalyst concentrated sulfuric acid (6% of reactant total mass) 8.14g slowly dropwise, heat to 85 ℃, after 4h reaction finishes, cool down and remove moisture by decompression distillation to obtain modified glycerin-sulfuric acid Esterification - modified triethanolamine.

[0029] The percentages are all percentages by mass. According to ...

Embodiment 3

[0031] A kind of triethanolamine modified cement grinding aid, its raw material is composed of: modified glycerin-sulfated-triethanolamine 13%, sodium acetate 6%, molasses 4%, sodium thiosulfate 16%, balance is water, The total amount is 100%; said percentages are mass percentages. Its preparation of described modified triethanolamine comprises the following steps:

[0032] Reaction with triethanolamine, ammonium sulfate and glycerol with a molar ratio of 1:1:1: add triethanolamine (55g, 0.36mol), ammonium sulfate (47.6g, 0.36mol) and glycerol (33g, 0.36mol) in a three-neck round bottom flask ) stirring, add catalyst before heating up, add catalyst concentrated sulfuric acid (7% of reactant total mass) 9.49g slowly dropwise, heat to 88 ℃, after 3h reaction finishes, cool down and decompress to remove moisture to obtain modified glycerin-sulfuric acid Esterification - modified triethanolamine.

[0033] The percentages are all percentages by mass. According to the formula rati...

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Abstract

The invention discloses a triethanolamine-modified cement grinding aid and a preparation method thereof. The cement grinding aid is prepared from, by mass percentage, 5-16% of modified glycerol-sulfated triethanolamine, 5-8% of sodium acetate, 3-5% of molasses, 11-18% of sodium thiosulfate and the balance water, wherein the total amount is 100%. Adjuvants added according to demands are adopted andare high in chemical stability, halogen ions capable of corroding equipment are not contained, the early strength and later strength of cement are obviously improved, the grinding efficiency can be obviously improved through the participation of the modified alcohol amine, and the water retention property of the cement after grinding is improved.

Description

technical field [0001] The invention belongs to the technical field of cement production, and in particular relates to a triethanolamine modified cement grinding aid and a preparation method thereof. Background technique [0002] In the cement production process, the energy consumption of cement grinding is high, and the energy utilization rate is very low, and the use of cement grinding aids has small investment, quick results, and can improve the performance of cement. It is the easiest way to save energy, reduce consumption and improve grinding efficiency. effective method. At present, commercial cement grinding aids are mostly alcohol amines and polyols, such as triethanolamine, triisopropanolamine, ethylene glycol and other organic compounds. Triethanolamine is a highly polar alkanolamine. The aqueous solution is alkaline and can chelate metal ions in cement to interact with minerals. It was used as a concrete early-strength agent in the early stage, which can quickly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B103/52
CPCC04B40/0039C04B2103/52C04B24/16C04B24/04C04B24/001C04B22/147
Inventor 李晓静谢昊刘国华
Owner NANJING YONGNENG MATERIALS
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