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Method for preparing octadecyl amine polyoxyethylene ether

A technology of aliphatic amine polyoxyethylene ether and aliphatic amine, which is applied in the field of preparation of octadecane fatty amine polyoxyethylene ether, can solve the problems of incomplete and thorough reaction, small polymerization reaction space, and great influence of polymerization reaction, etc., and achieve the product Good chemical stability, shortened reaction time, and thorough polymerization

Inactive Publication Date: 2012-02-15
吴金海
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the polymerization reaction of octadecyl fatty amine and ethylene oxide is carried out inside the material, the polymerization reaction space is small, the flow of the material in the kettle is poor, and the stratification phenomenon is serious. The polymerization reaction is greatly affected by the material, and the reaction is incomplete. Thorough, and the reaction time is long, and the quality of the finished product is poor
After the stearyl fatty amine polyoxyethylene ether prepared by this method is compounded with other surfactants, a lot of flocs will be produced, and the compatibility and stability are poor.
In order to solve the problem of flocs, the manufacturer puts the catalyst in the polymerization reaction of octadecyl fatty amine and ethylene oxide and also puts in the oxidant at the same time, which increases the production cost. At the same time, the introduction of new substances will affect the performance of the product. come unpredictable impact

Method used

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  • Method for preparing octadecyl amine polyoxyethylene ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the first step, add 570kg of octadecyl fatty amine into the 2000L spray reactor, heat up to 170°C while vacuuming, and the pressure in the kettle is 0.3MPa. The spray nozzle on the upper part of the kettle is sprayed into the kettle, and ethylene oxide is sprayed into the kettle at the same time, and the cycle is like this. The reaction is 1.5 hours, and the amount of ethylene oxide added is 220 kg. After the reaction, keep warm for 30 minutes and cool to 95 ° C.

[0022] In the second step, the inside of the above-mentioned kettle is evacuated to inhale 4 kg of catalyst potassium hydroxide, and the temperature is raised to 125 ° C, and the temperature is kept for more than 30 minutes. It is sucked out from the suction port at the lower part of the reactor, and then sprayed into the reactor from the spray nozzle at the upper part of the reactor, and ethylene oxide is added by spraying at the same time, and this cycle is repeated. The amount of ethylene oxide added is ...

Embodiment 2

[0026] In the first step, add 550 kg of octadecyl fatty amine into the spray reactor, heat up to 165°C while vacuuming, and the pressure in the kettle is 0.25MPa. The upper spray nozzle is sprayed into the kettle, and ethylene oxide is added by spraying at the same time, and the cycle is like this. The reaction is 1.0 hours, and the amount of ethylene oxide added is 200 kg. After the reaction, keep warm for 35 minutes and cool to 98 ° C.

[0027] In the second step, the inside of the kettle is evacuated to inhale 4 kg of catalyst potassium hydroxide, and the temperature is raised to 115°C, and the temperature is kept for 38 minutes. The air in the kettle is replaced with nitrogen for three consecutive times and the air is removed. The suction port at the lower part of the reaction kettle is sucked out, and then sprayed into the kettle by the spray nozzle at the upper part of the reaction kettle, and ethylene oxide is added by spraying at the same time. Keep warm for 40 minutes...

Embodiment 3

[0029] In the first step, add 480kg of octadecyl fatty amine into the 2000L spray reactor, heat up to 160°C while vacuuming, and the pressure inside the kettle is 0.2MPa. The spray nozzle on the upper part of the kettle is sprayed into the kettle, and ethylene oxide is sprayed into the kettle at the same time, and the circulation is like this. The reaction is 0.8 hours, and the amount of ethylene oxide added is 180 kg. After the reaction, keep warm for 40 minutes and cool to 90 ° C.

[0030] In the second step, the inside of the kettle is evacuated to inhale 3kg of catalyst potassium hydroxide, and the temperature is raised to 100°C, and the temperature is kept for 60 minutes. The suction port at the lower part of the reaction kettle is sucked out, and then sprayed into the kettle by the spray nozzle at the upper part of the reaction kettle, and ethylene oxide is sprayed at the same time, and this cycle is repeated. The amount of ethylene oxide added is 1070 kg, and the reactio...

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Abstract

The invention relates to a method for preparing octadecyl amine polyoxyethylene ether. The octadecyl amine polyoxyethylene ether is prepared by adding ethylene oxide and a catalyst into octadecyl amine which is taken as a raw material, and performing polymerization reaction. The method is characterized in that the reaction comprises the following two steps of: 1, adding the octadecyl amine into a spray reaction kettle, raising the temperature to 160 to 170 DEG C during vacuumization until the pressure in the kettle is 0.2 to 0.3MPa, sucking the material in the kettle out from the reaction kettle, spraying from the upper part of the reaction kettle, spraying the ethylene oxide into the kettle at the same time, and pre-reacting; and 2, adding the catalyst, namely potassium hydroxide, and spraying the residual ethylene oxide into the kettle at the same time. The reaction time is short, the reaction is complete, and the compatibility is high when the octadecyl amine polyoxyethylene ether is compounded.

Description

technical field [0001] The invention relates to a preparation method of octadecyl fatty amine polyoxyethylene ether, which is widely used in chemical production as an emulsifier. It belongs to the technical field of chemical auxiliary production. Background technique [0002] At present, the preparation method of octadecyl fatty amine polyoxyethylene ether adopts a one-step stirring method: it is prepared by polymerization reaction of octadecyl fatty amine and ethylene oxide in a stirred reactor, and the catalyst is potassium hydroxide. In this method, the polymerization reaction of octadecyl fatty amine and ethylene oxide is carried out inside the material, the polymerization reaction space is small, the flow of the material in the kettle is poor, and the stratification phenomenon is serious. The polymerization reaction is greatly affected by the material, and the reaction is incomplete. Thorough, and the reaction time is longer, and the quality of the finished product is ...

Claims

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Application Information

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IPC IPC(8): C08G65/26
Inventor 吴金海张武艺吴云清
Owner 吴金海
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