Method for preparing ethylene glycol mono-n-butyl ether by continuous pipe reaction

A technology of mono-n-butyl ether and ethylene glycol, which is applied in the field of continuous pipeline reaction to prepare ethylene glycol mono-n-butyl ether, can solve problems such as difficulty in improving production efficiency, low equipment utilization rate, and complicated process, and achieve improved production Efficiency, reduced production costs, and simple operation

Active Publication Date: 2009-01-07
江苏德纳化学股份有限公司
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing ethylene glycol mono-n-butyl ether by continuous pipeline reaction, which overcomes the defects of complex process, low equipment utilization rate and difficu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] The adiabatic reaction method is used. The pipeline reactor adopts a stainless steel tube with an outer diameter of 8mm, a wall thickness of 1mm and a length of 180m. The outer wall of the pipeline reactor is insulated with thermal insulation materials, and the reactor volume is 5L. The catalyst zinc methanedisulfonate was prepared in the raw material n-butanol according to 0.04% of the mass of butanol, and the n-butanol equipped with the catalyst zinc methanedisulfonate was transported by a metering pump, the control flow was 2.26L / h, and the epoxy Ethane is transported by another metering pump, and the flow rate is controlled at 0.24L / h. The n-butanol and ethylene oxide delivered by the two metering pumps are mixed by a static mixer, and the reaction raw materials are preheated to 140°C by a preheater. , continuously fed into the pipeline reactor, the pressure regulating valve set at the outlet of the pipeline reactor controls the operating pressur...

Example Embodiment

[0019] Example 2

[0020] An isothermal reaction method was used. The pipeline reactor adopts a stainless steel tube with an outer diameter of 8 mm, a wall thickness of 1 mm and a length of 180 m, and the reactor volume is 5 L. The pipeline reactor is placed in an oil bath, and the heat-conducting oil in the oil bath is equipped with a temperature control adjustment system. The heat-conducting oil in the oil bath can effectively remove the reaction heat released in the pipeline reactor and achieve the effect of isothermal reaction. The catalyst adopts a mixture of aluminum trifluoromethanesulfonate and zinc methanedisulfonate, and the catalyst aluminum trifluoromethanesulfonate and zinc methanedisulfonate are respectively prepared in the raw material at 0.01% and 0.02% of the mass of butanol. In butanol, n-butanol equipped with a mixture of catalyst aluminum trifluoromethanesulfonate and zinc methanedisulfonate is transported by a metering pump with a controlled flow of 1.85L...

Example Embodiment

[0021] Example 3

[0022]A method combining a partial isothermal reaction with a partial adiabatic reaction is used. The pipeline reactor adopts a stainless steel tube with an outer diameter of 8 mm, a wall thickness of 1 mm and a length of 180 m, and the reactor volume is 5 L. The 30m-long stainless steel pipe is placed in an oil bath. The heat-conducting oil in the oil bath is equipped with a temperature control system. The heat-conducting oil in the oil bath can effectively remove the reaction heat released from the pipeline reactor and achieve the effect of partial isothermal reaction. The outer wall of the stainless steel tube with a length of 150m is kept warm by thermal insulation materials, the catalyst is aluminum trifluoromethanesulfonate, and the catalyst aluminum trifluoromethanesulfonate is prepared in the raw material n-butanol according to 0.03% of the mass of butanol, and a catalyst three The n-butanol of aluminum fluoromethanesulfonate is delivered by a meter...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for preparing glycol mono-n-butyl ether by continuous channel reaction, which comprises the following steps: mixing n-butyl alcohol, ethylene oxide and alkyl sulfonate serving as a catalyst, preheating, continuously feeding into a channel reactor, carrying out etherification reaction at a reaction temperature of 130 to 220 DEG C and under a pressure of 3.5 to 6.0 MPa, and rectifying the reaction result to recover the excessive n-butyl alcohol and obtain the glycol mono-n-butyl ether. According to the method, the conversion rate of the ethylene oxide is 100%, and the selectivity of the glycol mono-n-butyl ether is 85 to 94%. The continuous channel reaction process can improve the production efficiency of the glycol mono-n-butyl ether, and has excellent large-scale industrial application prospect.

Description

technical field [0001] The invention relates to a method for preparing ethylene glycol mono-n-butyl ether, in particular to a method for preparing ethylene glycol mono-n-butyl ether through continuous pipeline reaction. Background technique [0002] As the glycol ether used as a solvent, the amount of ethylene glycol mono-n-butyl ether and its acetate is the largest. It has good dispersibility in water and is widely used in water-based coatings. In addition, it is also an excellent solvent for nitrocellulose, alkyd resin and phenolic resin. Due to its slow evaporation rate, it is effective in improving the gloss of varnishes and preventing peeling. It can be used as a thinner in quick-drying paints and enamel paints to increase the adhesion between paints, wood and metal. [0003] The etherification reaction of n-butanol and ethylene oxide (EO) is a common method for preparing ethylene glycol mono-n-butyl ether, usually using liquid acid (such as BF 3 Diethyl ether comple...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C43/13C07C41/03B01J31/04
Inventor 秦旭东秦怡生陈荣福王伟蒋大智
Owner 江苏德纳化学股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap