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Method for preparing ethylene glycol monopropyl ether

A technology of ethylene glycol monopropyl ether and n-propanol, which is applied to the preparation of ether from alkylene oxide, ether preparation, chemical instruments and methods, etc., to achieve the effects of easy operation and control, high catalyst activity and good selectivity

Inactive Publication Date: 2011-10-19
南通德益化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the research on these catalysts has made great progress, the catalyst activity, selectivity, practicability, etc. still need to be improved.

Method used

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  • Method for preparing ethylene glycol monopropyl ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 0.86g methane disulfonate and 750g n-propanol into a 1L stainless steel external circulation reactor, fully replace the air in the kettle with nitrogen, start the reactor, and add 110g ethylene oxide dropwise at 130-150℃ , And pass cooling water into the cooling coil in the kettle to remove the reaction heat, keep the pressure at 0.35-0.45Mpa, after the addition, cool the discharge, and then remove the n-propanol on a 20 mm × 700 mm rectification column. Perform vacuum distillation to obtain the target product, ethylene glycol monopropyl ether. The analysis proved that the conversion rate of ethylene oxide reached 100%, and the yield of ethylene glycol monopropyl ether was 97%.

Embodiment 2

[0026] Put 0.78g of methyl disulfonate and 705g of n-propanol into a 1L stainless steel external circulation reactor, fully replace the air in the kettle with nitrogen, start the reactor, and add 110g of ethylene oxide dropwise at 130-150℃ , And pass cooling water into the cooling coil in the kettle to remove the reaction heat, keep the pressure at 0.35-0.45Mpa, after the addition, cool the discharge, and then remove the n-propanol on a 20 mm × 700 mm rectification column. Perform vacuum distillation to obtain the target product, ethylene glycol monopropyl ether. The analysis proved that the conversion rate of ethylene oxide reached 100%, and the yield of ethylene glycol monopropyl ether was 95%.

Embodiment 3

[0028] Put 0.65g methyl disulfonate and 675g n-propanol into a 1L stainless steel external circulation reactor, fully replace the air in the kettle with nitrogen, start the reactor, and add 110g ethylene oxide dropwise at 130-150℃ , And pass cooling water into the cooling coil in the kettle to remove the reaction heat, keep the pressure at 0.35-0.45Mpa, after the addition, cool the discharge, and then remove the n-propanol on a 20 mm × 700 mm rectification column. Perform vacuum distillation to obtain the target product, ethylene glycol monopropyl ether. Analysis proved that the conversion rate of ethylene oxide reached 100%, and the yield of ethylene glycol monopropyl ether was 92%.

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Abstract

The invention discloses a method for preparing ethylene glycol monopropyl ether. The method is mainly etherification reaction of n-propanol and ethylene oxide in the presence of methyl disulphonate serving as a catalyst. The catalyst for catalyzing the ethoxylation of the n-propanol is high in activity, products are in narrow distribution, the selectivity is high, the conversion rate of the ethylene oxide reaches 100 percent, and the yield of the ethylene glycol monopropyl ether is more than 95 percent.

Description

Technical field [0001] The invention relates to a preparation method of ethylene glycol monopropyl ether, in particular to adopt a synthetic method to prepare ethylene glycol monopropyl ether. Background technique [0002] The dissolving power of glycol ether is very strong, and the dissolving power of glycol ether is very strong. Its kauri butanol value (KB value) is 5 times that of aromatic hydrocarbon solvents and 17 times that of aliphatic hydrocarbon solvents; as a solvent The most used glycol ether is ethylene glycol monopropyl ether and its acetate. Ethylene glycol monopropyl ether has good dispersibility in water and is widely used in water-based coatings. In addition, it is also an excellent solvent for nitrocellulose, alkyd resins and phenolic resins. Because of its slow evaporation rate, it has obvious effects on improving the gloss of varnish and preventing peeling. It can be used as a thinner in quick-drying paint and enamel to increase the adhesion between paint a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/13C07C41/03B01J31/02
Inventor 章小红贾庆山马海兵王莉
Owner 南通德益化工有限公司
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