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

Method for preparing butyraldehyde from propylene and synthesis gas

A technology for synthesis gas and propylene, applied in the direction of carbon monoxide reaction preparation, organic chemistry, etc., can solve the problems of low conversion rate and production capacity of the second reactor, short catalyst life cycle, and high production cost

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that there are problems in the prior art that the conversion rate and production capacity of the second reactor are low, the service life of the catalyst is short, and the production cost is high, and a new method for preparing butyraldehyde from propylene and synthesis gas is provided

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 preparing butyraldehyde from propylene and synthesis gas
  • Method for preparing butyraldehyde from propylene and synthesis gas
  • Method for preparing butyraldehyde from propylene and synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] according to figure 2 In the process shown, the stream I containing propylene, synthesis gas and catalyst enters the first reactor 1, after the reaction, the vapor phase stream II is obtained at the top of the tower, and the liquid phase stream III is obtained at the bottom of the tower. Stream III enters the intermediate separation unit 3, and after separation, vapor phase stream IV and liquid phase stream V are obtained. Stream Ⅴ enters the subsequent process as a crude product. Stream II, stream IV, supplementary synthesis gas 4 and supplementary catalyst 5 enter the second reactor, and after the reaction, liquid phase stream VI containing butyraldehyde and tail gas 6 are obtained. Logistics Ⅵ is output as a product, and tail gas 6 is discharged out of bounds or enters the subsequent process.

[0025] The operating conditions of the first reactor are: pressure 1900KPa, temperature 90°C, residence time 3 hours. The weight ratio of propylene, synthesis gas and cata...

Embodiment 2

[0038] Flow process and operating conditions are the same as [Example 1], but the amount of feed is different.

[0039] The reaction result is: the conversion rate of the first reactor is 77%, and the conversion rate of the second reactor is 83%. See Table 4 and Table 5 for details.

[0040] Table 4

[0041]

[0042] table 5

[0043]

[0044] Under the premise of not changing the structure, size and size of the two reactors, the production capacity of the reaction system is increased by 10%. Nascent butyraldehyde increased from 395kmol / h to 435kmol / h. If there is a margin of more than 10% in the subsequent separation equipment, then only a small amount of equipment can be added to expand the capacity by 10%.

Embodiment 3

[0046] according to image 3 In the process shown, the stream I containing propylene, synthesis gas and catalyst enters the first reactor 1, after the reaction, the vapor phase stream II is obtained at the top of the tower, and the liquid phase stream III is obtained at the bottom of the tower. Stream III enters the intermediate separation unit 3, and after separation, vapor phase stream IV and liquid phase stream V are obtained. Stream Ⅴ enters the subsequent process as a crude product. Stream II, stream IV, supplementary synthesis gas 4 and supplementary catalyst 5 enter the second reactor, and after the reaction, stream VI containing butyraldehyde and tail gas 6 are obtained. Stream V and stream VI enter separation unit 7, using synthesis gas as stripping gas (stream 8), and after separation, vapor phase stream VII containing propylene and synthesis gas, liquid phase stream VIII containing catalyst and product butyraldehyde stream IX are obtained. Among them, stream VII i...

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 butyraldehyde from propylene and synthesis gas, and mainly solves the problems that a second reactor has low conversion rate and capacity and a catalyst has short life cycle and high production cost in the prior art. The method comprises the following steps of: a) allowing material flow I containing propylene, synthesis gas and a catalyst to enter a first reactor, and reacting to obtain vapor phase material flow II on the tower top and liquid phase material flow III on the tower bottom; b) allowing the material flow III to enter a middle separation unit, separating to obtain vapor phase material flow IV and liquid phase material flow V, and allowing the liquid phase material flow V serving as a crude product to enter a subsequent process; and c) allowing the material flow II, the material flow IV, make-up synthesis gas and a make-up catalyst to enter a second reactor, and reacting to obtain material flow VI containing the butyraldehyde. The method better solves the problems and can be applied to industrial production of preparing butyraldehyde from propylene and synthesis gas.

Description

Technical field [0001] The invention relates to a method for preparing butyraldehyde from propylene and synthesis gas. Background technique [0002] Butyraldehyde is an important organic chemical raw material. Currently, it is mainly produced industrially through oxo synthesis using propylene, carbon monoxide and hydrogen as raw materials. The document "Simulation Study on the Process of Synthesizing Butyraldehyde from the Oxylation of Propylene, Natural Gas Chemical Industry, 2009 (34): 20-24" discloses a process flow for the synthesis of butyraldehyde from the carbonylation of propylene and synthesis gas. This process uses propylene and synthesis gas as raw materials, and passes through two reactors in series to obtain the product butyraldehyde. The product then enters the downstream separation section and is evaporated twice to recover as much propylene and catalyst as possible. Part of the butyraldehyde is recycled as a reaction solvent, and part of it is sent to the do...

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): C07C47/02C07C45/50
Inventor 李真泽陈迎印立峰马伟丽
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