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Method for synthesizing butyl cellosolve

A technology of ethylene glycol butyl ether and ethylene oxide, which is applied in the field of fine chemicals, can solve the problems of difficult separation and recovery of catalysts, wide product distribution, equipment corrosion, etc. high effect

Active Publication Date: 2010-12-22
吉林怡达化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although potassium hydroxide has the advantages of high catalytic activity and short reaction time, there are also problems that the catalyst is not easy to separate and recover, and the product distribution is wide, and there are problems such as equipment corrosion and environmental pollution. It is urgent to use non-corrosive, non-polluting, Replace it with a new catalyst that is easy to separate, and use a solid base catalyst is an effective way to get rid of the disadvantages of the traditional etherification process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 1.1611g of catalyst and 207.5g of butanol into a reaction kettle with a volume of 2L, seal it, stir, and raise the temperature. When the temperature reaches 90°C, stop heating, and continue to introduce 24.68g of EO into the reaction kettle. At this time, butanol and EO The molar ratio of the reaction kettle is 5:1, the pressure of the kettle is controlled at 0.1-0.5MPa, and the reaction temperature is kept constant at 90° C. by adjusting the amount of water passed into the cooling coil of the reaction kettle. After the reaction, the conversion rate of EO was 64.29%, and the selectivity of EGBE was 74.11%.

Embodiment 2

[0028] Add 1.1611g of catalyst and 207.5g of butanol into a reaction kettle with a volume of 2L, seal it, stir, and raise the temperature. When the temperature reaches 100°C, stop heating, continue to introduce EO into the reaction kettle, and control the molar ratio of butanol to EO The ratio is 4:1, the pressure of the kettle is controlled to 0.1-0.5MPa, and the reaction temperature is kept constant at 100°C by adjusting the amount of water passed into the cooling coil of the reaction kettle. After the reaction, the conversion rate of EO was 87.60%, and the selectivity of EGBE was 68.00%.

Embodiment 3

[0030] Add 1.1611g of catalyst and 207.5g of butanol into a reaction kettle with a volume of 2L, seal it, stir, and raise the temperature. When the temperature reaches 110°C, stop heating, and continue to introduce 24.68g of EO into the reaction kettle. At this time, butanol and EO The molar ratio of the reaction kettle is 5:1, the pressure of the kettle is controlled at 0.1-0.5MPa, and the reaction temperature is kept constant at 110° C. by adjusting the amount of water passed into the cooling coil of the reaction kettle. After the reaction, the conversion rate of EO was 99.47%, and the selectivity of EGBE was 66.65%.

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PUM

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Abstract

The invention relates to a method for synthesizing butyl cellosolve, which is characterized by comprising the following steps of: adding butanol and a catalyst into a reaction kettle, sealing, agitating, heating to set reaction temperature and stopping heating; controlling reaction pressure at 0.1-0.5 MPa, and continuously introducing ethylene oxide into the reaction kettle according to the molarratio of butanol to ethylene oxide equaling to (5-1):1; after completing the introduction of the ethylene oxide, maintaining temperature until the temperature in the kettle does not rise any more andthe pressure in the kettle does not descend any more, and introducing cooling water to cool the discharged material to obtain butyl cellosolve. The catalyst is a supported potassium fluoride / aluminumoxide solid base catalyst. The method has the advantages of simple process, low equipment investment, low energy consumption, low material consumption, high EO (Ethylene Oxide) conversion rate and good environmental protection; moreover, the catalyst can be repeatedly used, so that the production cost is effectively reduced.

Description

(1) Technical field [0001] The invention relates to a method for synthesizing ethylene glycol butyl ether. It belongs to the technical field of fine chemicals. (2) Background technology [0002] Ethylene glycol monobutyl ether (EGBE), also known as butyl cellosolve, is a colorless and flammable liquid, soluble in most organic solvents and mineral oil. EGBE is one of the important industrial derivatives of epoxy compounds and is an extremely important fine chemical. Due to its chemical structure has two groups with strong dissolving functions - ether bond and hydroxyl group, the former is lipophilic and can dissolve hydrophobic compounds, the latter is hydrophilic and can dissolve hydrophilic compounds, so it has strong It is known as "universal solvent" because of its excellent dissolving power. [0003] Since the use of EGBE as a solvent in the mid-1970s abroad, EGBE has been widely used in paint, leather, coatings, textiles, organic chemicals and other industries. At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/13C07C41/03B01J27/12
Inventor 郭登峰刘准刘红曹惠庆蔡向阳
Owner 吉林怡达化工有限公司