Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of method of synthesizing ethyl tertiary amyl ether

A technology of ethyl tert-amyl ether and ethanol, which is applied in the field of synthesizing ethyl tert-amyl ether, can solve the problems of reduced selectivity, accelerated decomposition of tert-amyl alcohol, poor stability, etc., and achieves long operation period, high conversion rate, The effect of easy operation

Active Publication Date: 2015-10-21
CHINA PETROLEUM & CHEM CORP +1
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) As the reaction temperature rises, the reaction speed will be accelerated, but when the temperature is too high, the decomposition of tert-amyl alcohol will be accelerated, and the selectivity of the reaction will decrease
When zeolite molecular sieve is used as olefin etherification catalyst, it can be used at a higher temperature, and the selectivity of the target product alkyl tert-amyl ether is higher, but its activity is lower
However, when the Pd / Hβ zeolite catalyst prepared by impregnating the noble metal Pd on the β zeolite is used as an olefin etherification catalyst, the impregnation of the noble metal palladium will lead to a significant increase in the cost of the catalyst.
[0015] Traditional single-component carrier-supported heteropolyacid catalysts have the following disadvantages: ① Keggin structure of heteropolyacids is easily decomposed by heat; ② acid is easy to lose; ③ separation is difficult
Cause catalyst deactivation and conversion rate decrease, poor stability

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
  • A kind of method of synthesizing ethyl tertiary amyl ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0030] Preparation of magnesia and alumina (MgO-Al 2 o 3 ) Composite carrier supported cesium phosphotungstic acid salt catalyst:

[0031] After preparing mixed solutions of aluminum nitrate and magnesium nitrate with different concentrations, ammonia water was dropped into the above mixed solution, and a white precipitate was obtained under the conditions of co-precipitation temperature of 50° C. and pH value of 8.0 for 6 hours. After suction filtration, washing with deionized water, and drying at 100° C. for 10 hours. After the powder is extruded, it is calcined at 550°C for 10 hours to obtain magnesia and alumina (MgO-Al 2 o 3 ) Composite carrier.

[0032] The above (MgO-Al 2 o 3 ) composite carrier for 8 hours, dried at 100°C for 10 hours, calcined at 400°C for 6 hours, impregnated with phosphotungstic acid solution for 6 hours, dried at 100°C for 8 hours, and calcined at 450°C for 8 hours, Obtain cesium phosphotungstic acid salt / (MgO-Al 2 o 3 ) Composite supporte...

Embodiment 6～10

[0034] Preparation of titanium oxide and aluminum oxide (TiO 2 -Al 2 o 3 ) Composite carrier supported cesium phosphotungstic acid salt catalyst: replace magnesium nitrate in Example 1 with titanium tetrachloride, prepare mixed solutions of aluminum nitrate and titanium tetrachloride with different concentrations, and other conditions are the same as in Example 1. The compositions of the obtained supports and catalysts are shown in Table 1.

Embodiment 11～15

[0036] Preparation of zirconia and alumina (ZrO 2 -Al 2 o 3 ) Composite carrier loaded cesium phosphotungstic acid salt catalyst: Zirconium tetrachloride was used to replace magnesium nitrate in Example 1, and mixed solutions of aluminum nitrate and zirconium tetrachloride with different concentrations were prepared, and other conditions were the same as in Example 1. The compositions of the obtained supports and catalysts are shown in Table 1.

[0037] Table 1 Composition of aluminum-based composite oxide supports and catalysts

[0038] serial number Alumina / composite oxide carrier (mass%) Active component / catalyst (mass%) Example 1 80 20 Example 2 60 50 Example 3 30 30 Example 4 50 40 Example 5 40 35 Example 6 65 30 Example 7 35 40 Example 8 50 35 Example 9 45 30 Example 10 60 40 Example 11 30 50 Example 12 50 20 Example 13 70 35 Example 14 50 40 Example 15 ...

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 discloses a synthetic method of tert-amyl ethyl ether (TAEE). The method uses 2-methyl butene and ethyl alcohol as raw materials, and aluminum based composite metal oxide loaded with cesium acid phosphotungstate as a catalyst, and carries out synthesis of TAEE under the following conditions: reaction temperature of 100-180 DEG C, reaction pressure of 2.0-6.0MPa, liquid hourly volume space velocity of 2-methyl butene of 1.0-5.0 / h, and molar ratio of ethanol and 2-methyl-butane of 1.0:1-8.0:1. The method uses a fixed bed process for continuous synthesis of TAEE, and has the advantages of high conversion rate of raw materials and long running period.

Description

technical field [0001] The invention relates to a method for synthesizing ethyl tert-amyl ether. technical background [0002] With the rapid increase of urban car ownership and the increasingly prominent contradiction of environmental pollution caused by vehicle exhaust emissions, countries all over the world have stricter requirements on the emission of harmful substances in vehicle exhaust, and the emission of vehicle exhaust is closely related to the composition of gasoline. As environmentally friendly additives for modified gasoline, ethers have attracted widespread attention at home and abroad. Among them, methyl tert-butyl ether (MTBE) is the most widely used. Adding MTBE to gasoline can reduce the emission of harmful gases such as carbon monoxide and reduce air pollution. However, since the beginning of the 21st century, studies in the United States have found that formaldehyde can be detected in automobile exhaust using MTBE-added gasoline. At the same time, the st...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/04C07C41/06B01J31/26B01J31/38
CPCB01J27/188C07C41/06C07C43/046
Inventor 李花伊霍稳周吕清林刘野魏晓霞田丹
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com