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Catalyst for preparing bio-diesel, preparation method and application thereof

A biodiesel and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of long reaction time, complex production process and high production cost , to achieve the effect of simple preparation method, simple synthesis process and low production cost

Inactive Publication Date: 2012-05-02
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acid and alkali catalysis, the amount of acid and alkali used is large, the equipment is corroded, and the catalyst cannot be recycled. Especially after the reaction, the product must be neutralized and washed with water, which is prone to saponification and discharges a large amount of waste acid, Waste lye pollutes the environment and makes post-processing troublesome
Enzyme catalysis has disadvantages such as expensive catalysts, easy poisoning and deactivation of catalysts, high production costs, and long reaction times, which restrict the wide use of enzyme catalysts.
Although the supercritical method has a fast reaction speed and a high conversion rate, the reaction temperature, pressure, and alcohol-oil ratio are high, the production process is complicated, the production investment is expensive, and it is difficult to realize industrial production.

Method used

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  • Catalyst for preparing bio-diesel, preparation method and application thereof
  • Catalyst for preparing bio-diesel, preparation method and application thereof
  • Catalyst for preparing bio-diesel, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of catalyst

[0026] The 3.5mol / L ammonium persulfate hydrochloric acid solution (40mL, wherein the mass concentration of HCl in hydrochloric acid is 37.5%) is added dropwise in the 3mol / L aniline hydrochloric acid solution (45mL, wherein the mass concentration of HCl in hydrochloric acid is 37.5%) , stirred at 18°C ​​for 3 hours, filtered, washed the solid until neutral, and dried; soaked the dried solid in 0.12mol / L p-toluenesulfonic acid solution for 23 hours, filtered, and dried at 110°C , to be p-toluenesulfonic acid doped polyaniline catalyst.

[0027] (2) Preparation of biodiesel

[0028] In the reactor equipped with agitator, reflux condensing device, and thermometer, add waste oil (18g) after pretreatment, methanol (3g, the mass ratio of oil and methanol is 1:0.16) and catalyst (0.63g, the total mass of raw materials 3%), heated to 65 ° C, stirred and refluxed for 3 hours. After the reaction is finished, cool, filter, and filter out the catal...

Embodiment 2

[0032] (1) Preparation of catalyst

[0033] 3mol / L ammonium persulfate hydrochloric acid solution (45mL, wherein the mass concentration of HCl in hydrochloric acid is 37.0%) was added dropwise to 3.5mol / L aniline hydrochloric acid solution (40mL, wherein the mass concentration of HCl in hydrochloric acid was 37.0%) , stirred at 16°C for 4 hours, filtered, washed the solid until neutral, and dried; soaked the dried solid in 0.10mol / L p-toluenesulfonic acid solution for 20 hours, filtered, and dried at 100°C , to be p-toluenesulfonic acid doped polyaniline catalyst.

[0034] (2) Preparation of biodiesel

[0035] In the reactor equipped with stirrer, reflux condensing device, thermometer, waste oil (36g) after adding the pretreatment, methanol (7g, oil and methanol mass ratio are 1: 0.19) and catalyst (1.50g, raw material gross mass 3.5%), heated to 60 ° C, stirred and refluxed for 3 hours, the reaction solution was cooled to room temperature, filtered, and the catalyst was fil...

Embodiment 3

[0037] (1) Preparation of catalyst

[0038] 3.5mol / L ammonium persulfate hydrochloric acid solution (43mL, wherein the mass concentration of HCl in hydrochloric acid is 37.5%) was added dropwise to 4mol / L aniline hydrochloric acid solution (50mL, wherein the mass concentration of HCl in hydrochloric acid was 37.0%) , stirred at 14°C for 4 hours, filtered, washed the solid until neutral, and dried; soaked the dried solid in 0.14mol / L p-toluenesulfonic acid solution for 24 hours, filtered, and dried at 110°C , to be p-toluenesulfonic acid doped polyaniline catalyst.

[0039] (2) Preparation of biodiesel

[0040] In the reactor that stirrer, reflux condensing device, thermometer are housed, waste oil (54g) after adding the pretreatment, methanol (12g, oil and methanol mass ratio are 1: 0.22) and catalyst (2.64g, raw material total mass 4%), heated to 70°C, stirred and refluxed for 3.5 hours, the reaction liquid was cooled to room temperature, filtered, and the catalyst was filt...

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Abstract

The invention discloses a catalyst for preparing bio-diesel, which is obtained by the following preparation method: dripping the hydrochloric acid liquid of ammonium persulphate to the hydrochloric acid liquid of aniline; stirring at 10-18 DEG C for 3-4 hours; filtering, washing the solid till to neutral, and drying; soaking the solid after being dried in toluenesulfonic acid liquid for 20-24 hours, filtering and drying to obtain the catalyst doped poly-aniline in the toluenesulfonic acid. The catalyst has catalytic action while the bio-diesel is prepared with the drainage oil. Compared with the prior art, the invention has the following advantages: (1) the catalyst has high catalytic activity while the bio-diesel is prepared with the drainage oil, small quantity of the catalyst, short reaction time, low reaction temperature and high yield of the product which is 97.5-98.9%; (2) the catalyst preparation method is simple, the price is low, the catalyst after being used can be directly reused without any treatment and can be reused for many times, and the catalytic activity is changed.

Description

technical field [0001] The invention relates to a catalyst for preparing biodiesel, a preparation method thereof, and an application of the catalyst in preparing biodiesel from waste oil. Background technique [0002] In recent years, with the rapid development of the global economy, the sharp reduction of oil reserves while the demand for energy continues to grow, and the environmental pollution caused by the combustion of fossil fuels has become increasingly serious. Therefore, the development of new green renewable fuel resources has become a At present, the most widely concerned issue is also a hot topic in the research of new energy production technology. Biodiesel is a kind of biomass energy, which has the advantages of biodegradability, complete combustion, and less harmful substance emissions. It is currently the only renewable clean fuel that can replace petrochemical diesel in the world. It is known as "green gold". Therefore, The development of safe, green and ren...

Claims

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Application Information

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IPC IPC(8): B01J31/06C10C3/10C10L1/02
CPCY02E50/13Y02E50/10
Inventor 牛梅菊翟绍伟崔庆新龚树文尹汉东
Owner LIAOCHENG UNIV
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