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Solid base catalyst for biological diesel oil synthesis, preparation method and uses thereof

A solid base catalyst, biodiesel technology, applied in the preparation of liquid hydrocarbon mixtures, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problem of prolonged reaction time, complex preparation process, catalytic Ineffective and other problems, to achieve the effect of high catalytic efficiency, simple equipment, rich raw materials

Inactive Publication Date: 2008-05-28
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these catalysts have problems such as high price, complicated preparation process, or poor catalytic effect.
[0007] There have been many reports of directly using calcium carbonate, calcium oxide, and calcium hydroxide as basic solid catalysts for biodiesel synthesis. The effect is too poor. In order to improve the conversion rate of biodiesel, it is necessary to prolong the reaction time or adopt reaction conditions such as high temperature and high pressure (Patent Publication 2001-271090, Patent Publication 2004-35873), so the practicability is relatively poor

Method used

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  • Solid base catalyst for biological diesel oil synthesis, preparation method and uses thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh CaO 10g, (NH 4 ) 2 CO 3 25g into an 800ml beaker, add 200ml of water, add 2g of emulsifier (Tween), put it in a cold water bath to cool, and stir at high speed for 1 hour at the same time to generate CaCO 3 . Suction filter the prepared calcium carbonate, then put it into an oven to dry, keep it at 105°C for 2 hours, grind it until it is completely dry, put it into a desiccator and save it for later use. Weigh 1.786gCaCO 3 In a crucible, heat up to 900°C in a high-temperature resistance furnace, calcinate for 2 hours, cool down to 650°C, take it out and cool it with anhydrous methanol to prepare the catalyst.

[0029] With 50g soybean oil (density is 0.92g / cm 3 ), 1g of the above catalyst and 21.5ml of methanol (density 0.792g / cm 3 ) mixed solution was put into a 250ml triangular grinding neck flask, placed on a constant temperature magnetic stirrer, stirred and heated to 67-68°C, and after 2 hours of reaction, the stirring and heating were stopped. Move t...

Embodiment 2

[0031] Weigh 3 g of calcium carbonate reagent (analytically pure) in a crucible, heat up to 900°C in a high-temperature resistance furnace, calcinate for 2 hours, cool down to 650°C, take it out and cool it with anhydrous methanol to prepare the catalyst.

[0032] With 50g soybean oil (density is 0.92g / cm 3 ), 1g of the above catalyst and 21.5ml of methanol (density 0.792g / cm 3 ) mixed solution was put into a 250ml triangular grinding neck flask, placed on a constant temperature magnetic stirrer, stirred and heated to 67-68°C, and after 2 hours of reaction, the stirring and heating were stopped. Move the reaction solution to a centrifuge to separate the catalyst, then pour it into a separatory funnel, let it stand, and separate it into upper and lower layers. After methanol was distilled off in the upper layer water bath, the conversion rate was measured to be 95.6%.

Embodiment 3

[0034] Weigh Ca(Ac) 2 40g, (NH4) 2 CO 3 30g into an 800ml beaker, add 300ml of water, add 3g of emulsifier (Tween), put it in a cold water bath to cool, and stir at high speed for 1 hour at the same time to generate CaCO 3 . The prepared calcium carbonate was suction filtered, then dried in an oven, kept at 105°C for 2 hours, ground into fine pieces after drying, and stored in a desiccator for later use. Weigh 1.786gCaCO 3 In a crucible, heat up to 900°C in a high-temperature resistance furnace, calcinate for 2 hours, cool down to 500°C, take it out and cool it with anhydrous methanol to prepare the catalyst.

[0035] 50g soybean oil (density is 0.92g / cm3), 1g above-mentioned catalyzer and 21.5ml methanol (density is 0.792g / cm3) mixed solution is put into 250ml triangular grinding mouth flask, is placed on the constant temperature magnetic stirrer and is stirred and heated to 67 -68°C, after 2 hours of reaction, stop stirring and heating. Move the reaction solution to ...

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Abstract

The invention discloses a solid base catalyst for biodiesel synthesis, a preparation method and use. The method of the invention has the advantages of simple technique, rich raw materials, low catalyst production cost and the prepared catalyst has high catalytic efficiency, good reproducibility and environmental protection.

Description

technical field [0001] The invention relates to the technical field of green and renewable energy, and specifically refers to a high-efficiency and cheap solid base catalyst for catalyzing the transesterification reaction of fatty acid glycerides and methanol to synthesize biodiesel, a preparation method and an application thereof. Background technique [0002] At present, biodiesel preparation methods mainly include direct mixing method, microemulsion method, pyrolysis method and transesterification method. The microemulsion method is a method of mixing animal and vegetable oils, solvents and microemulsifiers to make a microemulsion liquid with a lower viscosity than the original animal and vegetable oils. Although the biodiesel prepared by this method can reduce the viscosity of animal and vegetable oils, the cetane number is not high, and problems such as carbon deposition in combustion and lubricating oil pollution are difficult to solve. The direct mixing method is to ...

Claims

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Application Information

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IPC IPC(8): B01J31/04B01J23/02B01J27/236C10G3/00
CPCY02E50/13Y02E50/10Y02P20/52Y02P30/20
Inventor 郑国生周家春沈晓燕
Owner EAST CHINA UNIV OF SCI & TECH
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