A method for preparing aldehydes by solvent-free rapid oxidation and cracking of epoxy fatty acid methyl ester
A technology of epoxy fatty acid methyl ester and epoxy methyl oleate, which is applied in the preparation of carboxylic acid esters, preparation of heterocyclic compounds, chemical instruments and methods, etc., can solve the problem of low selectivity of aldehyde products and achieve conversion rate High selectivity with aldehydes, mild reaction conditions and short reaction time
Active Publication Date: 2021-10-26
ZHEJIANG UNIV OF TECH
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Problems solved by technology
However, most transition metal-catalyzed oxidative cracking methods of unsaturated fatty acid methyl esters will use a large amount of organic solvents, and the reaction time is usually as high as several hours. In addition, the direct oxidative cracking of carbon-carbon double bonds in unsaturated fatty acid methyl Substances are easily further oxidized to carboxylic acids, so the selectivity to aldehyde products is low
Method used
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Embodiment 1
[0015] Weigh 62.4980g epoxy methyl oleate, 0.9274g catalyst WO 3 and 45.3333g hydrogen peroxide (30% by mass), after mixing evenly, stirred and reacted in a water bath at 70°C for 20min, then filtered the reaction mixture and rotary steamed to obtain the cracking products of epoxy methyl oleate nonanal and Methyl 9-oxononanoate.
Embodiment 2
[0017] Weigh 62.4980g epoxy methyl oleate, 0.9274g catalyst WO 3 and 34.0000g hydrogen peroxide (30%), after mixing evenly, stirred and reacted in a 60°C water bath for 30 minutes, filtered the reaction mixture, and rotary steamed to obtain nonanal and 9-oxononanal, the cleavage products of epoxy methyl oleate acid methyl ester.
Embodiment 3
[0019] Weigh 62.4980g epoxy methyl oleate, 1.3911g catalyst WO 3 and 20.4000g hydrogen peroxide (50%), after mixing evenly, stirred and reacted in a water bath at 80°C for 10 minutes, filtered the reaction mixture, and rotary steamed to obtain nonanal and 9-oxononanal, the cleavage products of epoxy methyl oleate acid methyl ester.
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The method relates to the fields of renewable energy utilization technology and environmental protection, in particular to a method for preparing aldehydes by solvent-free rapid oxidative cracking of epoxy fatty acid methyl ester. The specific method is as follows: the catalyst, epoxy fatty acid methyl ester and hydrogen peroxide Mix evenly, stir and react at a water bath temperature of 40-90°C for 5-60 minutes, filter to remove the solid catalyst, and rotary evaporate to remove water, and finally obtain aldehydes as oxidative cracking products. The catalyst used in the invention has good catalytic performance, does not need to add organic solvents, has a green and environmental-friendly reaction process, mild reaction conditions and short reaction time. The invention uses epoxy fatty acid methyl ester, a downstream product of biodiesel, as a raw material, further oxidizes and cracks it to prepare high value-added products, broadens the industrial chain of biodiesel, and improves the utilization value of renewable resources.
Description
technical field [0001] The invention relates to the fields of renewable energy utilization technology and environmental protection technology, in particular to a method for preparing aldehydes by solvent-free rapid oxidation and cracking of epoxy fatty acid methyl ester. Background technique [0002] With the increasingly serious environmental degradation and increasingly stringent environmental protection requirements, energy researchers from all over the world are actively exploring the development of alternative fuels and renewable energy from the perspective of environmental protection and resource strategy, biodiesel (fatty acid methyl ester) is a promising part It is an important renewable energy that replaces petrochemical raw materials and is also an important raw material for oleochemicals. However, biodiesel has problems such as high oxygen content, poor combustion performance, and difficult storage. Not only that, but the quality of biodiesel is also limited by th...
Claims
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IPC IPC(8): C07C45/58C07C47/02C07C67/333C07C69/67
CPCC07C45/58C07C67/333C07C47/02C07C69/67
Inventor 卢美贞彭礼波计建炳聂勇解庆龙刘学军陆向红
Owner ZHEJIANG UNIV OF TECH