Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing acraldehyde

A technology of acrolein and propylene, which is applied in the field of catalytic liquid phase oxidation of propylene to prepare acrolein, which can solve the problems of low space-time yield, harsh reaction conditions, and short life of the catalyst, and achieve good industrial application prospects, high selectivity, and easy separation Effect

Active Publication Date: 2013-02-06
SUN YAT SEN UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the required reaction conditions are relatively harsh, and it needs to be carried out at a higher temperature, and the space-time yield of the catalyst is low, the life is short, and the cost is high

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 acraldehyde
  • Method for preparing acraldehyde
  • Method for preparing acraldehyde

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] will be 2.0×10 -3 mmol has the metalloporphyrin of general formula (I) (M 1 =Ni, R 1 =R 2 =R 3 =R 4 =R 5 =H) and 2.0×10 -3 mmol Cu(OAc) 2 Add 25mL of methanol, stir evenly, add to a volume of 50mL autoclave, fill with 0.2MPa propylene and 0.3MPa oxygen, at a temperature of 30 o The stirring reaction was carried out at C, and the conversion rate of propylene was 5% and the selectivity of acrolein was 75% through detection and analysis.

Embodiment 2

[0029] will be 1.0×10 -4 mmol has the metalloporphyrin of general formula (I) (M 1 = Fe, R 1 = Cl, R 2 =R 3 =R 4 =R 5 =H) and 1.0×10 -3 mmol Co(OAc) 2 Add 25mL of ethanol, stir evenly, add to a volume of 50mL autoclave, fill with 0.8MPa of propylene and 1.2MPa of oxygen, at a temperature of 60 o The stirring reaction was carried out at C, and the conversion rate of propylene was 16% and the selectivity of acrolein was 83% through detection and analysis.

Embodiment 3

[0031] will be 6.0×10 -4 mmol has the metalloporphyrin of general formula (I) (M 1 =Mn,R 3 =NO 2 , R 1 =R 2 =R 4 =R 5 =H) and 6.0×10 -3 mmol PdCl 2 Add 25mL of acetonitrile, stir evenly, add to a volume of 50mL autoclave, fill with 0.5MPa of propylene and 1.0MPa of oxygen, at a temperature of 70 o The stirring reaction was carried out at C, and the conversion rate of propylene was 24% and the selectivity of acrolein was 84% ​​through detection and analysis.

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 preparing acraldehyde. The method comprises the steps of adding a certain amount of organic solvent and cocatalyst with propylene as a raw material, oxygen as an oxidizer and a metalloporphyrin compound as a catalyst and carrying out a catalytic reaction under the conditions that the reaction temperature is 30-150 DEG C and the reaction pressure is 0.5-3.0MPa, thus acraldehyde is obtained in a high selection mode. The invention has the advantages of mild reaction condition, good catalytic effect, high acraldehyde selectivity and the like.

Description

technical field [0001] The invention relates to a method for preparing acrolein, in particular to a method for preparing acrolein by catalyzing the liquid-phase oxidation of propylene. Background technique [0002] As an important organic chemical product and raw material, acrolein has a wide range of uses. The oxidation of acrolein to acrylic acid is its most meaningful industrial application. In addition, acrolein can also be used to prepare animal feed additives such as methionine, glycerin, glutaraldehyde and water treatment agents. With the expansion of the use of acrylic acid and the continuous growth of the consumption of downstream products, the market demand for acrolein is increasing year by year. [0003] The early industrial production methods of acrolein were the selective oxidation of propionaldehyde and the condensation of formaldehyde and acetaldehyde. Since Mobil Oil Company of the United States successfully developed molybdenum-bismuth catalysts in the ea...

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): C07C47/22C07C45/35
Inventor 纪红兵周贤太李扬
Owner SUN YAT SEN UNIV