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Preparation method of monoethylamine polyoxyethylene ether

A technology of monoethylamine polyoxyethylene ether and monoethylamine, which is applied in the field of preparation of monoethylamine polyoxyethylene ether, and achieves the effects of simple process steps, high production efficiency and short reaction time

Inactive Publication Date: 2015-07-29
JIANGSU JIAHUA ADVANCED MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis method of monoethylamine polyoxyethylene ether is seldom reported in the literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0020] 1. First pump out the air in the kettle and turn on the vacuum.

[0021] 2. Press 100Kg of monoethylamine into the reaction kettle. Start stirring and heat up to 80°C, record the temperature and pressure in the kettle.

[0022] 3. Add 280Kg of ethylene oxide and control the temperature of the kettle below 110°C.

[0023] 4. Add KOH catalyst and keep stirring, vacuum properly until the pressure is less than 0.8Mpa, and add the remaining 280Kg of ethylene oxide.

[0024] 5. Control the temperature of the kettle at 130°C and keep it warm to complete the reaction for 5 hours.

[0025] 6. Cool down to below 60°C, and take samples to measure the indicators.

Embodiment 2）

[0027] 1. First pump out the air in the kettle and turn on the vacuum.

[0028] 2. Press 100Kg of monoethylamine into the reaction kettle. Start stirring and heat up to 100°C, record the temperature and pressure in the kettle.

[0029] 3. Add 330Kg of ethylene oxide, and control the temperature of the kettle below 130°C.

[0030] 4. Add KOH catalyst and keep stirring, vacuum properly until the pressure is less than 0.8Mpa, and add the remaining 330Kg of ethylene oxide.

[0031] 5. Control the temperature of the kettle at 140°C and keep it warm to complete the reaction for 7 hours.

[0032] 6. Cool down to below 60°C, and take samples to measure the indicators.

Embodiment 3）

[0034] 1. First pump out the air in the kettle and turn on the vacuum.

[0035] 2. Press 110Kg of monoethylamine into the reactor. Start stirring and heat up to 70°C, record the temperature and pressure in the kettle.

[0036] 3. Add 300Kg of ethylene oxide, and control the temperature of the kettle below 130°C.

[0037] 4. Add KOH catalyst and keep stirring, vacuum properly until the pressure is less than 0.9Mpa, and add the remaining 300Kg of ethylene oxide.

[0038] 5. Control the temperature of the kettle at 140°C and keep it warm to complete the reaction for 8 hours.

[0039] 6. Cool down to below 60°C, and take samples to measure the indicators.

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Abstract

The invention relates to a preparation method of monoethylamine polyoxyethylene ether. The method is characterized by comprising specific steps as follows: firstly, air in a reaction kettle is pumped out, and vacuum is formed; monoethylamine is pressed into the reaction kettle, stirred and heated to the reaction temperature of 70-140 DEG C, and values of the temperature and the pressure in the reaction kettle are recorded; the temperature in the reaction kettle is controlled to range from 70 DEG C to 85 DEG C, half of ethylene oxide is added slowly, the temperature in the reaction kettle is controlled to be lower than 140 DEG C, and the pressure is controlled to be lower than 0.8 MPa; stirring is performed after a catalyst is added, the air in the reaction kettle is pumped out until the reaction kettle is in a negative pressure state of lower than minus 0.08 MPa; the other half of ethylene oxide is added continuously, the temperature in the reaction kettle is controlled to be lower than 140 DEG C, and the temperature is held for a complete reaction for 3-8 h; the reaction kettle is cooled to the temperature lower than 60 DEG C. With the adoption of the method, the reaction time is short, the reaction temperature is low, the finished product is not required to be decolorized, process steps are simple, and the production efficiency is high.

Description

technical field [0001] The invention relates to a preparation method of monoethylamine polyoxyethylene ether. Background technique [0002] Monoethylamine polyoxyethylene ether can be used as emulsifier, textile auxiliaries in many fields, and also as a pharmaceutical intermediate. The synthetic method of monoethylamine polyoxyethylene ether is seldom reported in literature at present. Contents of the invention [0003] The purpose of the present invention is to overcome the defects in the prior art (synthetic methods are rarely reported in the literature), to provide a preparation of monoethylamine polyoxyethylene ether with short reaction time, low reaction temperature, simple process steps and high production efficiency method. [0004] The technical solution for realizing the object of the present invention is: a kind of preparation method of monoethylamine polyoxyethylene ether, and concrete steps comprise: [0005] (1), first pump out the air in the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26
Inventor 薛华仲艳郭朝彬
Owner JIANGSU JIAHUA ADVANCED MATERIALS TECH