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Polyoxometallate catalyst for preparing biodiesel

A polyoxometalate and biodiesel technology, which is applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, biofuels, etc., can solve unsuitable continuous production and separation of catalyst products , secondary pollution and other issues, to achieve the effect of wide applicability of raw materials, high catalytic activity and high conversion rate

Inactive Publication Date: 2015-11-25
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 4. Homogeneous liquid acid and liquid alkali are used as catalysts. Although the conversion rate of oil is high, the catalyst cannot be separated from the product. The product must be neutralized and washed to produce a large amount of acid (alkaline) sewage, causing secondary pollution to the environment. , while the homogeneous acid and base catalysts flow out with the product and cannot be reused, increasing the cost of biodiesel
[0010] 5. Liquid acid and alkali catalysts are corrosive to equipment
However, anion and cation exchange resins are used for transesterification and are easily inactivated (references SmithK., El-HitiG.A., JayneA.J., ButtersM., Org.Biomol.Chem., 2003, 1, 1560) Amberlyst Catalyst deactivated after 2 hours, Nafion deactivated after 4.5 hours, not suitable for continuous production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Weigh the polyoxometalate compound H4[SiW with a molar ratio of 1:1.5 12 o 40 ]·23H 2 O and precipitant CsCl. Pour the polyoxometalate compound into the reactor, add distilled water with a mass ratio of 1:5 times, heat to 50°C, and stir to dissolve. A precipitant solid was added thereto, and the reaction solution was aged for 10 hours to precipitate a solid, which was filtered and washed with distilled water for 3 times until the pH value of the eluate reached 5. Precipitate in a mug furnace and sinter at 150°C for 2 hours to obtain a solid catalyst of polyoxometalate compound. Its yield was 84%.

[0065] The structure of the solid catalyst was confirmed by infrared spectrum and ultraviolet spectrum.

Embodiment 2

[0067] Weigh the polyoxometalate compound H with a molar ratio of 1:6 6 [P 2 W 18 o 62 ]·23H 2 O and precipitant CsCl. Pour the polyoxometalate compound into the reactor, add distilled water with a mass ratio of 1:10 times, heat to 60°C, and stir to dissolve. A precipitant solid was added thereto, and the reaction solution was aged for 2 hours to precipitate a solid, which was filtered and washed with distilled water for 3 times until the pH value of the eluate reached 8. Precipitate in a mug furnace and sinter at 300°C for 6 hours to obtain a solid catalyst of polyoxometalate compound. Its yield was 84%.

Embodiment 3

[0069] Weigh the polyoxometalate compound H with a molar ratio of 1:2.5 4 [SiW 12 o 40 ]·23H 2 O and precipitant NH 4 Cl. Pour the polyoxometalate compound into the reactor, add distilled water with a mass ratio of 1:8 times, heat to 55°C, and stir to dissolve. A precipitant solid was added thereto, and the reaction solution was aged for 6 hours to precipitate a solid, which was filtered and washed with distilled water for 3 times until the pH value of the eluate reached 7. Precipitate in a mug furnace and sinter at 150°C for 4 hours to obtain a solid catalyst of polyoxometalate compound. Its yield was 84%.

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Abstract

The invention relates to a polyoxometallate catalyst for preparing biodiesel. The catalyst is a polyoxometallate compound which has a Keggin structure or a Dawson structure. Biodiesel is catalytically prepared by the catalyst. The catalyst has high catalytic activity and repeatability and wide raw material applicability. The whole preparation process is free of waste water, so that the catalyst is green and environmental-friendly.

Description

technical field [0001] The invention relates to a polyoxometalate catalyst for preparing biodiesel. technical background [0002] Petrochemical fuel oil plays a pivotal role in the development of the national economy, but its non-renewability and environmental pollution also restrict the sustainable development of my country's national economy. Energy shortage and environmental degradation have become major issues faced by all countries in the world. In order to meet the needs of social development for energy, realize the sustainable utilization of resources, maintain and promote the coordinated development of resources, environment, and social economy, countries have invested a lot of manpower and material resources to develop safe and renewable new energy. The use of inexhaustible biomass resources to produce fuels and petrochemical products is an important direction of green chemistry. Biodiesel is a renewable fuel resource from animals or plants, with excellent biodegr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/16B01J31/18C11C3/10C07C31/22C07C29/128C07C29/80
CPCY02E50/10
Inventor 王晓红张丹乔红阳
Owner NORTHEAST NORMAL UNIVERSITY
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