Green synthesis method for preparing alcohol ether by using olefin in one step

A green synthesis and olefin technology, applied in ether preparation, organic chemistry, etc., can solve the problems of two-stage reaction, limitation, and many reaction steps

Inactive Publication Date: 2017-12-22
SHANDONG UNIV OF TECH
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In CN100556880C, under the conditions of temperature 0-200°C and pressure 0.5-8.5MPa, double fixed-bed reactors are used. In the first fixed bed, propylene and hydrogen peroxide are used as raw materials, methanol is used as a solvent, and titanium-silicon molecular sieve is used as a catalyst to synthesize epoxy Propane, in the second fixed bed, using modified titanium silicon molecular sieve or sodium alkoxide, potassium alkoxide, alkali, etc. as a catalyst, propylene oxide and methanol react, the selectivity of alcohol ether is over 93%, and the conversion rate of hydrogen peroxide is over 98%. This method requires two fixed beds to react in two steps, with many reaction steps, cumbersome operation, high reaction temperature and high pressure.
In CN103012078, TS-1 and metal oxo acid salts/polymetal oxo acid salts are used as catalysts to directly synthesize alcohol ethers from propylene, hydrogen peroxide, and methanol at a temperature of 50 ° C and a pressure of 1.5 MPa. The selectivity of alcohol ethers is over 90%, but The reaction pressure is high, and the conversion rate of propylene is low, only 85%
Chen, Jizhong used toluene as solvent, 1,2-hexene, hydrogen peroxide, and methanol were directly etherifi

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Green synthesis method for preparing alcohol ether by using olefin in one step

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] According to the amount of 2% of TS-1 loaded copper oxide, copper hydroxide is impregnated and loaded, filtered, dried, and roasted to obtain a titanium-silicon molecular sieve copper catalyst. Other operations are the same as in Comparative Example 1. The membrane side clear liquid is analyzed. The selectivity is 99.1%. The clear liquid is continuously sent to the deene-dealcoholization tower to remove olefins and alcohols and returned to continue the reaction, and the bottom liquid is sent to the rectification tower for rectification to obtain alcohol ether products with a purity of 99.5% and a yield of 98.1%.

Embodiment 2

[0021] Carry out zinc hydroxide impregnation loading by the amount of Ti-MCM-41 zinc oxide 3%, filter, dry, roast, obtain titanium silicon molecular sieve zinc catalyst, 1-butene: ethanol: 50% hydrogen peroxide: catalyst is 15:5: 1:0.08 was tested, and the membrane side clear liquid was continuously fed into the deene dealcoholization tower to remove olefins and alcohols and returned to continue the reaction, and the bottom liquid was rectified into a rectification tower to obtain alcohol ether products with a purity of 99.6% and a yield of 98.3 %.

Embodiment 3

[0023] Carry out nickel nitrate impregnation loading according to the amount of Ti-SBA-15 loaded nickel oxide 10%, filter, dry, roast, obtain titanium silicon molecular sieve nickel catalyst, 2-butene: isopropanol: 70% hydrogen peroxide: catalyst is 26:10 : 1:0.1 is tested, and the film side clear liquid is continuously entered into the deene dealcoholization tower to remove olefins and alcohols and returns to continue the reaction, and the still bottom liquid enters the rectification tower to rectify to obtain the alcohol ether product, the purity is 99.5%, and the yield is 98.1%.

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 belongs to the field of organic chemical industry, and provides a green synthesis method for preparing alcohol ether by using olefin in one step. The green synthesis method is characterized in that a jet type reactor is used for continuously jetting alcohol, hydrogen peroxide and a cyclization-alcoholysis catalyst into a pressured reaction kettle filled with olefin gas, so that continuous epoxidation and alcoholysis reaction is carried out; after being separated by a ceramic membrane, reaction liquid enters to an olefin and alcohol removal tower; after olefin and alcohol are removed, the reaction liquid directly and continuously enters to a rectifying tower, and the alcohol ether product is obtained by rectifying; the effective utilization rate of the hydrogen peroxide is more than or equal to 98%, the alcohol ether selectively is greater than or equal to 99%, and the product purity is higher than or equal to 99.5%. The green synthesis method can be used for preparing the alcohol ether in one step and is suitable for industrial large-scale production.

Description

technical field [0001] A green synthesis method for one-step production of alcohol ethers from olefins. The invention provides a green synthesis method for one-step production of alcohol ethers from olefins, and specifically relates to epoxidation and alcoholysis reactions. Background technique [0002] Alcohol ethers currently mainly have two synthesis methods, the first is the direct alcoholysis of alkylene oxide, and the second is the direct epoxidative alcoholysis of olefins. Alcohol ether synthesis At present, more studies mainly focus on the synthesis of propylene glycol methyl ether. [0003] The first direct alcoholysis method of alkylene oxide is that alkylene oxide is subjected to alcoholysis with alcohol at high temperature and high pressure under the action of a catalyst to obtain alcohol ether. In CN92113418.5, modified alumina is used as a catalyst, propylene oxide and methanol are subjected to alcoholysis under the conditions of 90-140°C and 0.7-1.5MPa, the ...

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): C07C41/01C07C43/13C07C43/196C07C43/178
CPCC07C41/01C07C43/13C07C43/196C07C43/1787
Inventor 王平朱红军楚庆岩余昊轩裴福斌李明党程月月陈鹏超许铭原
Owner SHANDONG UNIV OF TECH
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