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Polyoxometallate catalyst for preparing biological diesel oil

A polyoxometalate, biodiesel technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, biofuels, etc., can solve the separation of catalyst products and is not suitable for continuous production , easy deactivation and other problems, to overcome the complex process flow, wide applicability of raw materials, high catalytic activity

Inactive Publication Date: 2007-06-06
NORTHEAST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 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
[0011] 5. Liquid acid and alkali catalysts are corrosive to equipment
But anion and cation exchange resins are used for transesterification, and are easily deactivated (references Smith K., El-Hiti G.A., Jayne A.J., Butters M., Org.Biomol.Chem., 2003, 1, 1560) Amberlyst catalyst 2 Inactivated after 1 hour, Nafion inactivated after 4.5 hours, not suitable for continuous production

Method used

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  • Polyoxometallate catalyst for preparing biological diesel oil
  • Polyoxometallate catalyst for preparing biological diesel oil
  • Polyoxometallate catalyst for preparing biological diesel oil

Examples

Experimental program
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Effect test

Embodiment 1

[0072] Weigh the polyoxometalate compound H with a molar ratio of 1:1.5 4 [SiW 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%.

[0073] The structure of the solid catalyst was determined by infrared spectroscopy (see Figure 2) and ultraviolet spectroscopy (see Figure 3).

Embodiment 2

[0075] 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

[0077] 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 present invention relates to one kind of polyoxometallate catalyst for preparing biodiesel oil, and the polyoxometallate is compound in Keggin structure or Dawson structure. The polyoxometallate catalyst is used in preparing biodiesel oil and has high catalytic activity, high repeatability and wide material adaptability. The preparation process is green and produces no waste water.

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 use of resources, maintain and promote the coordinated development of resources, the environment, and social economy, countries have invested a lot of manpower and material resources in the research and development of 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 derived from animals or pl...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J27/188C10G3/00C07C67/03C07C69/003
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 王晓红柴芳曹凤华翟凤英陈阳关宏宇
Owner NORTHEAST NORMAL UNIVERSITY
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