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A kind of cement grinding aid and preparation method thereof

A cement grinding aid and xylene technology, applied in the field of cement additives, can solve problems such as poor adaptability to process conditions, poor product quality stability, and single components, so as to promote the increase of cement output, broaden the types of raw materials, and reduce production. cost effect

Active Publication Date: 2017-05-31
SHANDONG HONGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, defects such as single component, high cost, poor product quality stability, and poor adaptability to process conditions, which are common in my country's grinding aid products, affect the popularization and application of grinding aids. Therefore, it is urgent to develop a class of grinding aids through experimental research. A multifunctional composite grinding aid with excellent grinding aid effect, low cost, stable product performance, and high universality, which can improve the physical properties of cement, stimulate the activity of mixed materials, and increase the amount of mixed materials

Method used

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  • A kind of cement grinding aid and preparation method thereof
  • A kind of cement grinding aid and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: a kind of preparation method of cement grinding aid is realized through the following steps:

[0016] Put triethanolamine, n-octanoic acid, toluene and sulfamic acid in a molar ratio of 1.0:1.0:1.0:0.02 in a round-bottomed flask, under N 2 Under protection, the reaction was carried out under stirring conditions, the reaction temperature was controlled at 120 ° C, and the reaction was carried out for 6 hours. The water generated by the reaction was evaporated, and the residue was the crude product; the crude product obtained after vacuum distillation was sequentially washed with saturated Na 2 CO 3 The solution was washed with distilled water to remove unreacted octanoic acid and triethanolamine, and finally the toluene was evaporated by a rotary evaporator to obtain the final product.

Embodiment 2

[0018] A preparation method of cement grinding aid is realized through the following steps:

[0019] Place triethanolamine, myristic acid, xylene and hypophosphite in a round-bottomed flask with a molar ratio of 1.0:1.2:1.2:0.02 under N 2 Protection, heating reaction under stirring conditions, the reaction temperature is controlled at 130 ° C, the reaction is 7h, the water generated by the reaction is evaporated, and the residue is the crude product; the crude product obtained after vacuum distillation is sequentially passed through saturated Na 2 CO 3 The solution was washed with distilled water to remove unreacted myristic acid, and finally the xylene was evaporated to obtain the final product.

Embodiment 3

[0021] A preparation method of cement grinding aid is realized through the following steps:

[0022] A solution of triethanolamine, palmitic acid, xylene and p-toluenesulfonic acid in a molar ratio of 1.0:1.6:1.5:0.03 was placed in a round bottom flask under N 2 Under protection, the heating reaction was carried out under stirring conditions, the reaction temperature was controlled at 160 ° C, and the reaction was carried out for 8 hours. The water generated by the reaction was evaporated, and the residue was the crude product; the crude product obtained after vacuum distillation was sequentially passed through saturated Na 2 CO 3 The solution was washed with distilled water to remove unreacted palmitic acid, and finally the xylene was evaporated by a rotary evaporator to obtain the final product.

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Abstract

The invention discloses a cement grinding aid and a preparation method thereof. The preparation method comprises the following steps: adding alcamine, saturated fatty acid, a dehydrating agent and a catalyst in a molar ratio of 1.0: 1.0-2.4: 1.0-3.0: 0.02-0.05 into a reactor; under N2 protection, controlling the reaction temperature at 120-160 DEG C, performing reduced pressure heating reaction for 6-8h under a stirring condition to obtain a crude product; washing the crude product by using a saturated Na2CO3 solution and distilled water sequentially; evaporating out the dehydrating agent by using a rotary evaporator to obtain a final product. The invention further provides a using method of the cement grinding aid. The using method comprises the following steps: adding the cement grinding aid with a mass percentage of 0.01-0.025% into cement powder, and uniformly mixing. The novel cement grinding aid prepared by performing reduced pressure heating reaction on the saturated fatty acid and the alcamine is beneficial to energy conservation and emission reduction in cement production; raw materials are wide in sources, so that types of the raw materials of the cement grinding aid are widened; the cement grinding aid is applicable to production of the cement powder, and can promote increase in the cement yield, promote increase in the cement strength and reduce the production cost.

Description

technical field [0001] The invention relates to the field of cement additives, in particular to a cement grinding aid and a preparation method thereof. Background technique [0002] Cement is an indispensable building material in human life and social production. It is used in a wide range and in large quantities, and is known as "the grain of the construction industry". However, the cement production industry pollutes a lot and consumes a lot of energy. In order to save energy and reduce consumption, the best way is to add cement grinding aids during the grinding process. On the one hand, cement grinding aids can increase the output of the cement mill per unit, thereby directly reducing the power consumption of grinding; on the other hand, Cement grinding aids can also stimulate the activity of industrial waste slag and reduce the amount of cement clinker used, thereby saving coal and electricity consumption caused by the production of cement clinker, reducing the emission...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C04B103/52
Inventor 赵洪义张丽君侯陕朱化雨
Owner SHANDONG HONGYI TECH
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