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Method for producing cement grinding aid by replacement and sulfonation of tri-isopropanolamine

A technology of triisopropanolamine and cement grinding aid, applied in organic chemistry, sulfonate preparation and other directions, can solve problems such as side reactions and sulfuric acid affecting the reaction process, and achieve low air entrainment, easy product quality, and improved product quality. The effect of stability

Inactive Publication Date: 2016-06-01
杨建华
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] (2) There is H in the first step of esterification 2 O is generated, so the concentration of sulfuric acid will be diluted and affect the reaction process
[0021] Raising the temperature of esterification can speed up the reaction speed and shorten the reaction time, but too high temperature will lead to the occurrence of side reactions

Method used

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  • Method for producing cement grinding aid by replacement and sulfonation of tri-isopropanolamine
  • Method for producing cement grinding aid by replacement and sulfonation of tri-isopropanolamine
  • Method for producing cement grinding aid by replacement and sulfonation of tri-isopropanolamine

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Experimental program
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Effect test

Embodiment 1

[0059] to 1M 3 The reactor was depressurized to -0.09Mpa, and 191kg of triisopropanolamine was pumped into the reactor, and then 490kg of concentrated sulfuric acid was added into the reactor, the stirring speed was set at 30r / min, and the temperature in the reactor was 45°C to 60°C. Simultaneously, the pressure was reduced to 0.09Mpa, and the reaction time was half an hour; the sodium sulfite solution with an effective content of 252kg was pumped into the still, and the stirring speed was adjusted to 30r / min, and the pressure in the still was adjusted to normal pressure, and the temperature in the still was 70 ℃, maintain the reaction conditions for 1.5h; then adjust the reaction kettle to normal temperature and pressure, add an aqueous solution with an effective sodium hydroxide of 240kg, adjust the stirring speed to 10r / min, take a sample and analyze the pH value of 11.0 after 20 minutes, then the reaction is over , get product BJ-020 of the present invention.

[0060] The...

Embodiment 2

[0068] to 1M 3 The reactor was depressurized to -0.09Mpa, and 191kg of triisopropanolamine was pumped into the reactor, and then 539kg of concentrated sulfuric acid was added into the reactor, the stirring speed was set at 60r / min, and the temperature in the reactor was 45°C to 60°C. The reaction time is half an hour; the sodium sulfite solution with an effective content of 252kg is pumped into the kettle, the stirring speed is adjusted to 50r / min, and the pressure in the kettle is adjusted to normal pressure, the temperature in the kettle is 70°C, and the reaction condition is maintained at 3.5 h; then adjust to normal temperature and pressure in the reactor, add effective sodium hydroxide as an aqueous solution of 260kg, and the stirring speed is adjusted to 10r / min, after 20 minutes, the sampling analysis pH value is 10.0, then the reaction ends, and the product BJ of the present invention is obtained- 021.

[0069] The product BJ-021 of the present invention was compared ...

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Abstract

Through a displacement sulfonation reaction, a mixture which takes isopropanolamine sulfonate salt as a main component is prepared, and the mixture can be directly taken as a cement grinding aid. During a preparation process, the composition of a resultant is controlled by employing a feeding ratio of the raw materials and reaction condition. The method has the characteristics of simpleness, easy control, low energy consumption and low cost. In addition, due to introduction of sodium sulfonate group, the raw material cost is greatly reduced. The mixture which takes the isopropanolamine sulfonate salt as the main component has the advantages of stronger high temperature resistance performance, stronger dispersibility, better enhancement performance, and larger doping amount scope and cost.

Description

Technical field: [0001] The invention uses triisopropanolamine as raw material, through sulfate esterification, then substitutes sulfonation with sodium sulfite, and then neutralizes with appropriate amount of NaOH to produce cement grinding aid. Background technique: [0002] Cement grinding aid is an admixture that changes the effect of cement grinding, reduces the energy consumption of cement grinding, and changes the performance of cement. It belongs to surfactants and is a new energy-saving and environmentally friendly material. The development history of cement grinding aids in foreign countries is relatively early, but it is relatively late in my country. The utilization rate of cement grinding aids in developed countries has reached 95%, while the utilization rate of cement industry in my country is less than 20%. This gap is relatively large, so cement grinding aids still have a lot of room for development in my country. [0003] The grinding process of cement clin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C07C309/14C07C303/32C04B103/52
Inventor 杨建华
Owner 杨建华
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