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Catalyst-free industrial continuous production method of diethanolisopropanolamine

A technology of monoisopropanolamine and production method, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problem that the stability of diethanol monoisopropanolamine is difficult to control and guarantee, and the labor intensity of operators It is beneficial to the promotion and application of industrialization, the labor intensity of workers is low, and the material consumption and energy consumption are low.

Active Publication Date: 2015-11-18
MAOMING YUNLONG IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, this intermittent production method needs to constantly adjust the operating parameters of the reactor, the material consumption and energy consumption in the whole production process are high, the stability of the product quality of diethanol monoisopropanolamine is difficult to control and guarantee, and the labor of the operators Stronger
In addition, in the batch production method in the prior art, the content of diethanol monoisopropanolamine in the product from the aging tank is unstable, generally 92% to 94%, which affects product quality and reduces production capacity. benefit

Method used

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  • Catalyst-free industrial continuous production method of diethanolisopropanolamine

Examples

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Embodiment 1

[0041] See figure 2 . A kind of industrial continuous production method of the catalyst-free production of diethanol monoisopropanolamine of the present embodiment, it comprises the following steps:

[0042] (1) Input the raw material diethanolamine 20 into the first heater 22 and heat it to 130°C, then enter the first reaction kettle 23, and at the same time, input a part of the raw material propylene oxide 21 into the second heater 27, heat it to 85°C, and then enter the first reaction Kettle 23: control the pressure and temperature of the first reaction kettle 23, after the raw material diethanolamine 20 and a part of the raw material propylene oxide 21 react in the first reaction kettle 23 for 150min, the first mixture containing diethanol monoisopropanolamine is generated , the content of diethanol monoisopropanolamine in the first mixture is 88%; in this embodiment, the pressure of the first reactor 23 is 0.15Mpa, and the temperature of the first reactor 23 is 142°C. ...

Embodiment 2

[0052] See figure 2 . A kind of industrial continuous production method of the catalyst-free production of diethanol monoisopropanolamine of the present embodiment, it comprises the following steps:

[0053] (1) Input the raw material diethanolamine 20 into the first heater 22 and heat it to 120°C, then enter the first reaction kettle 23, and at the same time, input a part of the raw material propylene oxide 21 into the second heater 27, heat it to 70°C, and then enter the first reaction Kettle 23: control the pressure and temperature of the first reaction kettle 23, after the raw material diethanolamine 20 and a part of the raw material propylene oxide 21 react in the first reaction kettle 23 for 100min, the first mixture containing diethanol monoisopropanolamine is generated , the content of diethanol monoisopropanolamine in the first mixture is 90%; in this embodiment, the pressure of the first reactor 23 is 0.05Mpa, and the temperature of the first reactor 23 is 155°C. ...

Embodiment 3

[0063] See figure 2 . A kind of industrial continuous production method of the catalyst-free production of diethanol monoisopropanolamine of the present embodiment, it comprises the following steps:

[0064] (1) Input the raw material diethanolamine 20 into the first heater 22 to heat to 150°C and then enter the first reaction kettle 23, and at the same time, input a part of the raw material propylene oxide 21 into the second heater 27 to heat to 100°C and then enter the first reaction Kettle 23: control the pressure and temperature of the first reaction kettle 23, after the raw material diethanolamine 20 and a part of the raw material propylene oxide 21 react in the first reactor 23 for 180min, the first mixture containing diethanol monoisopropanolamine is generated , the content of diethanol monoisopropanolamine in the first mixture is 89%; in this embodiment, the pressure of the first reactor 23 is 0.20Mpa, and the temperature of the first reactor 23 is 130°C.

[0065] W...

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Abstract

The invention relates to the technical field of petroleum chemical engineering, and especially relates to a catalyst-free industrial continuous production method of diethanolisopropanolamine. The method comprises the following steps: 1, diethanolamine is input to a heater, obtained heated diethanolamine enters a first reaction kettle, and one part of a raw material epoxypropane is input to a heater, and the part of heated epoxypropane enters the first reaction kettle to generate a first mixture; 2, the first mixture is sent to a second reaction kettle, and another part of epoxypropane is input to a heater, and the another part of heated epoxypropane enters the second reaction kettle to generate a second mixture; 3, the second mixture is sent to a third reaction kettle, the remaining epoxypropane is input to a heater, and the heated remaining epoxypropane enters a third reaction kettle to generate a third mixture; and 4, the third mixture is directly sent to a slaking pipe jacket to generate the diethanolisopropanolamine product with the purity being 95% or more. The method has the advantages of continuous and stable implementation of kettle reactions, stable quality of the product, low material and energy consumption, low labor intensity of workers, and industrial popularization and application benefiting.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to an industrial continuous production method for producing diethanol monoisopropanolamine without catalyst. Background technique [0002] Diethanol monoisopropanolamine (N-Methyldiethanolamine), Chinese alias: 1-[bis(2-hydroxyethyl)amino]-2-propanol; 1-[N,N-bis(2-hydroxyethyl) amino]propan-2-ol. Diethanol monoisopropanolamine is miscible with various organic solvents, has good compatibility, is easily soluble in water, and is alkaline. The molecular structure of diethanol monoisopropanolamine contains both alcohol and amine functional groups, which can react with various substances to form esters, amide salts, etc. [0003] Diethanol monoisopropanolamine is a new generation of cement grinding aid raw material, which can replace triethanolamine and triisopropanolamine. Using diethanol monoisopropanolamine as a grinding aid can significantly improve the grinding aid...

Claims

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Application Information

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IPC IPC(8): C07C215/12C07C213/04
Inventor 梁坤
Owner MAOMING YUNLONG IND DEV
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