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

Method for producing MTBE from high-concentration isobutene by adopting mixed phase bed reactor

A high isobutylene and reactor technology, applied in the chemical industry, climate sustainability, organic chemistry, etc., can solve the problems of high investment in catalytic distillation technology and difficulty in catalyst loading, and achieve the effect of reducing energy consumption and equipment investment

Inactive Publication Date: 2015-06-03
SHANGHAI DONGHUA ENVIRONMENT ENG +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the investment of catalytic distillation technology is high, and the catalyst loading is difficult. It is not suitable for processing raw materials with high isobutene content. It is generally used in combination with other technologies.

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
  • Method for producing MTBE from high-concentration isobutene by adopting mixed phase bed reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the first embodiment of the present invention provides a high-content isobutene mixed carbon four synthetic MTBE process flow.

[0025] After fully mixing the mixed C4 containing 45%wt isobutene and methanol through the mixer 101, the isobutene and methanol are mixed at a molecular ratio of 1:0.8, heated to 40°C by the feed pre-heater 102, and mixed with the circulating material to enter the mixed phase Bed reactor 103, wherein the isobutene content in the inlet raw material is 14.2wt%. The mixed-phase bed reactor is a cylinder reactor, and the material passes through the catalytic bed layer from bottom to top, and the operating pressure is controlled at 650kPaG. In the mixed-phase bed reactor, the heat released by the reaction vaporizes part of the materials, the vaporization rate is controlled at 13.7%, and the reactor outlet temperature is 65.2°C. The reacted gas-liquid mixture enters the flash tank 104 for gas-liquid separation, wherein ...

Embodiment 2

[0027] The isobutene and methanol in the raw carbon four are mixed at a molecular ratio of 1:0.85. The isobutene content in the raw material at the reactor inlet was 12.6wt%, the reaction pressure was controlled at 650kPaG, the reactor outlet temperature was 64.5°C, and the vaporization rate was 9.9%. The flow rate of the circulating material is controlled at 60% of the flow rate of the C4 raw material, and the temperature of the circulating material after cooling is 40°C. The reflux ratio of the catalytic distillation tower is 0.7, and the top pressure of the catalytic distillation tower is 500kPaG. All the other are with embodiment 1.

[0028] It has been determined that the energy consumption of the catalytic rectification tower using the mixed-phase bed process is 13.1MW, and the MTBE purity in the bottom of the tower is 99.53%.

Embodiment 3

[0030] The isobutene and methanol in the raw carbon four are mixed at a molecular ratio of 1:0.9. The isobutene content in the raw material at the reactor inlet was 15.4 wt%, the reaction pressure was controlled at 700kPaG, the reactor outlet temperature was 68.2°C, and the vaporization rate was 14.2%. The flow rate of the circulating material is controlled at 50% of the flow rate of the C4 raw material. The temperature of the circulating material after cooling is 40°C. The reflux ratio of the catalytic distillation tower is 0.8, and the top pressure of the catalytic distillation tower is 550kPaG. All the other are with embodiment 1.

[0031] It has been determined that the energy consumption of the catalytic rectification tower using the mixed-phase bed process is 13.2MW, and the MTBE purity in the bottom of the tower is 99.55%.

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 method for producing MTBE (Methyl Tertiary Butyl Ether) from high-concentration isobutene by adopting a mixed phase bed reactor. According to the method, mixed C4 raw materials containing 25-65wt% of isobutene enters the mixed phase bed reactor, and is subjected to an etherification reaction to generate MTBE under the effect of a catalyst; under the effect of reaction heat, a part of material in the reactor is vaporized into a vapor phase and a liquid phase; material at the outlet of the reactor is subjected to flash evaporation to obtain a stream of gas and a stream of liquid, wherein the gas enters a catalytic distillation column, a part of the liquid enters the catalytic distillation column, and the other part of the liquid returns to the mixed phase bed reactor after being subjected to pressure cooling. According to the method, the requirement on the concentration of isobutene in the material entering the mixed phase bed reactor is met, the energy consumption of the catalytic distillation column is reduced by utilizing heat generated by reaction, and good economic effect is provided.

Description

technical field [0001] The invention is a process for producing MTBE by reacting mixed C4 raw materials with high isobutene content with methanol by using a mixed-phase bed reactor and catalytic distillation technology. Background technique [0002] MTBE is an important gasoline additive and can also be used to produce high-purity isobutene. The etherification reaction of mixed carbon four and methanol is the main production method of MTBE. There are two main sources of mixed carbon four: one is the mixed carbon four produced by FCC, in which the content of isobutene is between 15% and 20%; the other is the mixed carbon four produced by ethylene plant, in which the content of isobutene Between 40%-45%. [0003] The etherification reaction of isobutene and methanol to synthesize MTBE is an exothermic reaction. According to different heat extraction methods, MTBE etherification reactor has the following different forms: [0004] 1. Tubular fixed bed technology [0005] Us...

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): C07C41/06C07C41/42C07C43/04
CPCC07C41/06C07C41/42C07C43/046Y02P20/10
Inventor 程程远高兴娜廖明杰
Owner SHANGHAI DONGHUA ENVIRONMENT ENG
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