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Preparation method of zinc oxide nano fiber catalyst used in ester exchange reaction

A zinc oxide nano-transesterification technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve easy loss, difficult recovery, easy agglomeration, etc. problem, to achieve the effect of less corrosion, less waste liquid, and larger specific surface area

Inactive Publication Date: 2009-04-01
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nanomaterials currently used for catalytic reactions are usually in the form of powders, which are easy to agglomerate, easy to be lost during use, and difficult to recycle.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Prepare 42g of polyvinyl alcohol / acetic acid solution with 35g of acetic acid and 7g of polyvinyl alcohol, then add 7g of zinc acetate and 0.25g of manganese acetate to the solution, and form a transparent and uniform spinning solution after stirring for a period of time.

[0030] 2. Zinc acetate / manganese acetate / polyvinyl alcohol composite fibers were prepared by electrospinning with an electrospinning apparatus at a voltage of 8kV, a distance between the spinneret and the receiving device of 20cm, a feed flow rate of 4ml / 1h, and a temperature of 50°C. Put the prepared composite nanofiber into a muffle furnace for high-temperature calcining, and keep it at 600° C. for 5 hours to obtain a zinc oxide nanofiber catalyst doped with manganese ions.

[0031] 3. Mix 100g of jatropha oil and 25g of methanol, add 1g of manganese-doped zinc oxide nanofiber catalyst, stir and mix evenly, then heat to 75°C for 7 hours. After the reaction is finished, unreacted methanol is dist...

Embodiment 2

[0033] 1. Prepare 65 g of polyvinyl alcohol / formic acid solution with 57 g of formic acid and 8 g of polyvinyl alcohol, then add 7 g of zinc acetate and 2 g of silver nitrate into the solution, and form a transparent and uniform spinning solution after stirring for a period of time.

[0034] 2. Zinc acetate / silver nitrate / polyvinyl alcohol composite fibers were prepared by electrospinning with an electrospinning apparatus at a voltage of 9kV, a distance between the spinneret and the receiving device of 18cm, a feed flow rate of 5ml / 1h, and an electrospinning temperature of 45°C. The prepared composite nanofibers were calcined in a muffle furnace at a high temperature, and kept at 600° C. for 3 hours to obtain zinc oxide nanofiber catalysts doped with silver ions.

[0035] 3. Mix 100 g of soybean oil and 20 g of methanol, add 1 g of silver-doped zinc oxide nanofiber catalyst, stir and mix evenly, then heat to 75° C. for 9 hours. After the reaction is finished, unreacted methano...

Embodiment 3

[0037] 1. Prepare 60 g of polyvinyl alcohol / butyric acid solution with 51 g of butyric acid and 9 g of polyvinyl alcohol, then add 7 g of zinc acetate and 0.5 g of nickel nitrate to the solution, and form a transparent and uniform spinning solution after stirring for a period of time.

[0038] 2. Prepare zinc acetate / nickel nitrate / polyvinyl alcohol composite fibers by electrospinning with an electrospinning apparatus at a voltage of 6kV, a distance between the spinneret and the receiving device of 17cm, a feed flow rate of 5ml / 1h, and an electrospinning temperature of 50°C. The prepared composite nanofibers were calcined in a muffle furnace at a high temperature and kept at 550° C. for 4 hours to obtain zinc oxide nanofiber catalysts doped with nickel ions.

[0039] 3. Mix 100g of lard and 20g of methanol, add 0.8g of nickel-doped zinc oxide nanofiber catalyst, stir and mix evenly, then heat to 70°C for 9 hours. After the reaction is finished, unreacted methanol is distilled ...

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PUM

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Abstract

The invention relates to the chemical catalysis field, in particular to a preparation method of a specific catalyst for preparing biodiesel, namely, a zinc oxide nano fiber catalyst doped with transition metal ions. The preparation method is characterized in that organic acid, polyvinyl alcohol, zinc acetate and transition metal salts are mixed into zinc oxide nano fiber stock solution doped with the transition metal ions according to weight percent. When the voltage is 5-10kV, the distance between a spinneret and a receiving device is 10-20cm, the feeding velocity is 3-5ml / 1h and the electro spinning temperature is 40-50 DEG C, an electrostatic spinning instrument is used for preparing zinc acetate / transition metal salts / polyvinyl alcohol composite fiber in an electro spinning way. The zinc acetate / transition metal salts / polyvinyl alcohol composite fiber is put in a muffle furnace for high temperature calcination and is kept for 3-5h at 500-600 DEG C. Then, the zinc oxide nano fiber doped with the transition metal ions is obtained. The method for preparing the zinc oxide nano fiber doped with the transition metal ions has the advantages of simple equipment, easy operation and large scale preparation. Used for the biodiesel preparation in catalytic oil alcoholysis reaction, the preparation method is characterized by mild condition, light corrosion on the equipment, less waste liquid production, low pollution to the environment and repeatable utilization of the catalyst.

Description

technical field [0001] The invention relates to the field of chemical catalysis, in particular to a method for preparing a special catalyst for biodiesel transesterification—a zinc oxide nanofiber catalyst doped with transition metal ions. Background technique [0002] Biodiesel refers to a long-chain fatty acid ester compound obtained by transesterifying animal and vegetable oils with low-carbon alcohols. It has the advantages of high cetane number, low sulfur content, and biodegradability. Diesel alternative fuel. The method for industrialized production of biodiesel generally adopts caustic alkali (such as NaOH, KOH, etc.) as a catalyst for transesterification. This method has high requirements on the anti-acid and alkali corrosion ability of the equipment; the catalyst separation process is complicated and needs to go through a series of steps such as acid neutralization, washing, static (or centrifugation) separation; and a large amount of saline wastewater is generate...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J35/06C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 陈顺玉陈登龙吕玮
Owner FUJIAN NORMAL UNIV