Alkylol amine and preparation method

A technology of alcohol amine and monoethanol amine, which is applied in the field of material engineering to achieve the effects of controllable process, high purity and simple preparation method

Inactive Publication Date: 2013-07-17
FUCLEAR SCI & TECH (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, with the acceleration of urbanization, people are more and more urgent to improve their living conditions. The demand for a large number of concrete houses has driven the rapid development of cement, and the use of cement grinding aids to increase cement production and strength has become more and more popular. Pay attention to, wherein, alcohol amine is the focus of research at home and abroad in recent years, in the prior art, commonly used triethanolamine is used as the component of grinding aid, and its application has reached the limit, so it is necessary to develop new alcohol amine to improve the performance of cement. Increase production, improve the strength of cement products in the early stage and in the later stage of application

Method used

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  • Alkylol amine and preparation method

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preparation example Construction

[0011] From the perspective of the preparation method of the alcohol amine, it includes the following main steps: 1. Add monoethanolamine to the reactor under negative pressure, and fill the reactor with nitrogen to replace the air in the reactor; 2. Start the external circulation to adjust the temperature to 40 ± After 2°C, vacuum up to the highest negative pressure; Ⅲ. Turn off the vacuum and close the reaction kettle, heat the monoethanolamine in it to 90-100°C, then add propylene oxide to carry out circular reaction, and the reaction temperature is controlled at 90-110°C . The reaction pressure is less than 0.35MPa; Ⅳ. Keep warm at 90-110°C for a period of time until the pressure in the reactor no longer drops, and then stop the external circulation and discharge the material after cooling to 50-60°C. The reaction molar ratio of the above monoethanolamine and propylene oxide is 1:2.

[0012] As an optimization of the above technical scheme, in step III, before adding propy...

Embodiment 1

[0014] Example 1: Put 610 kg of monoethanolamine into a clean and dry 2000L external circulation atomization kettle under negative pressure, fill with nitrogen to replace the air in the kettle, start the canned pump to adjust the temperature of the external circulation, and vacuumize at 42°C After 41 minutes, the negative pressure reaches the highest level, close the vacuum valve, and close the reactor; slowly heat the monoethanolamine to 95°C, stop heating, spray 10 kg of propylene oxide from the top of the reactor, and the pressure in the reactor will decrease after 5 minutes. Fall back, and then continuously add propylene oxide. With the addition of propylene oxide, the material reacts, the temperature in the kettle naturally rises gradually, and the pressure in the kettle increases; the material in the kettle is drawn from the bottom of the kettle by the canned pump, pressurized by the canned pump, and adjusted by the heat exchanger Atomize from the top of the kettle and t...

Embodiment 2

[0015] Example 2: Under negative pressure, put 500 kg of monoethanolamine into a clean and dry 2000L external circulation atomization kettle, fill with nitrogen to replace the air in the kettle, start the canned pump to adjust the temperature of the external circulation, and vacuumize at 39°C After 32 minutes, the negative pressure reaches the highest level, close the vacuum valve, and close the reactor; slowly heat the monoethanolamine to 100°C, stop heating, spray 8 kg of propylene oxide from the top of the reactor, and the pressure in the reactor will decrease after 5 minutes. Fall back, and then continuously add propylene oxide. With the addition of propylene oxide, the material reacts, the temperature in the kettle naturally rises gradually, and the pressure in the kettle increases; the material in the kettle is drawn from the bottom of the kettle by the canned pump, pressurized by the canned pump, and adjusted by the heat exchanger Atomize from the top of the kettle and ...

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Abstract

The invention discloses alkylol amine and a preparation method. Alkylol amine is one of preparation materials of a grinding aid for grinding cement. The chemical structure of alkylol amine is expressed as follows: N[C2H4O][C3H6O]2. Alkylol amine is prepared by performing a circular reaction of monoethanolamine and epoxypropane under the condition of vacuum, negative pressure and moderate temperature. Compared with the prior art, the technical scheme of alkylol amine and the preparation method provided by the invention has the remarkable advantages that alkylol amine obtained by the method is good in luster and high in purity, and the yield of cement can be improved by the cement grinding aid prepared by alkylol amine; and meanwhile, the preparation method is simple, the process is controllable, and the reaction is stable and safe.

Description

technical field [0001] The invention relates to an organic amine, in particular to an alcohol amine and a preparation method thereof, belonging to the field of material engineering. Background technique [0002] At present, with the acceleration of urbanization, people are more and more urgent to improve their living conditions. The demand for a large number of concrete houses has driven the rapid development of cement, and the use of cement grinding aids to increase cement production and strength has become more and more popular. Pay attention to, wherein, alcohol amine is the focus of research at home and abroad in recent years, in the prior art, commonly used triethanolamine is used as the component of grinding aid, and its application has reached the limit, so it is necessary to develop new alcohol amine to improve the performance of cement. Increase production, improve the strength of cement products in the early stage and in the later stage of application. Contents o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C215/12C07C213/04C04B24/12C04B103/52
Inventor 李国云
Owner FUCLEAR SCI & TECH (SUZHOU) CO LTD
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