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Solid base catalyst for preparing biodiesel

A solid base catalyst, biodiesel technology, applied in physical/chemical process catalysts, biofuels, petroleum industry and other directions, can solve the problems of high energy consumption and high equipment requirements, and achieve the effects of easy purification, cost reduction and easy separation

Inactive Publication Date: 2014-10-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the supercritical reaction is carried out under high temperature and high pressure conditions, the reaction requires high equipment and consumes a lot of energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 5.7g ZnCl 2 , 16.5g MnCl 2 and 20.7g K 2 CO 3 , respectively dissolved in deionized water to obtain a mass fraction of 5.4% ZnCl 2 Solution, the mass fraction is 14.2% MnCl 2 solution and mass fraction is 3.3% K 2 CO 3 solution.

[0023] At 60°C, the ZnCl 2 solution and MnCl 2 The solution was mixed and poured into K 2 CO 3 solution, and stir rapidly to make the solution fully mixed and precipitated;

[0024] Stand still, cool, and age at room temperature. The precipitate was washed thoroughly with deionized water until the conductivity of the washed-out solution was almost equal to that of deionized water. Filter and dry, then calcinate at 400°C for 24 hours, and obtain manganese carbonate zinc oxide composite solid base catalyst after cooling.

[0025] In a 500ml high-temperature and high-pressure reactor equipped with internal reflux and mechanical stirring, add the above-mentioned solid catalyst, methanol and soybean oil in sequence according to t...

Embodiment 2

[0027] Weigh 8.5g ZnCl 2 , 10g MnCl 2 and 22g K 2 CO 3 , respectively dissolved in deionized water to obtain a mass fraction of 7.8% ZnCl 2 Solution, mass fraction is 11.0% MnCl 2 solution and mass fraction is 3.3% K 2 CO 3 solution.

[0028] At 55°C, the ZnCl 2 solution and MnCl 2 The solution was mixed and poured into K 2 CO 3 solution, and stir rapidly to make the solution fully mixed and precipitated;

[0029] Stand still, cool, and age at room temperature. The precipitate was washed thoroughly with deionized water until the conductivity of the washed-out solution was almost equal to that of deionized water. Filter and dry, then calcinate at 300°C for 0.5h, and cool to obtain a manganese carbonate zinc oxide composite solid base catalyst.

[0030] In a 500ml high-temperature and high-pressure reactor equipped with internal reflux and mechanical stirring, add the above-mentioned solid catalyst, methanol and soybean oil in sequence according to the catalyst mass...

Embodiment 3

[0032]Weigh 8.5g ZnCl 2 , 10g MnCl 2 and 18g K 2 CO 3 , respectively dissolved in deionized water to obtain a mass fraction of 7.8% ZnCl 2 Solution, mass fraction is 11.0% MnCl 2 solution and mass fraction is 3.3% K 2 CO 3 solution.

[0033] At 65°C, the ZnCl 2 solution and MnCl 2 The solution was mixed and poured into K 2 CO 3 solution, and stir rapidly to make the solution fully mixed and precipitated;

[0034] Stand still, cool, and age at room temperature. The precipitate was washed thoroughly with deionized water until the conductivity of the washed-out solution was almost equal to that of deionized water. Filter and dry, then calcinate at 400°C for 24 hours, and obtain manganese carbonate zinc oxide composite solid base catalyst after cooling.

[0035] In a 500ml high-temperature and high-pressure reactor equipped with internal reflux and mechanical stirring, add the above-mentioned solid catalyst, methanol and soybean oil in sequence according to the cataly...

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PUM

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Abstract

The invention discloses a solid base catalyst for preparing biodiesel. The solid base catalyst is prepared by adopting the method comprising the steps of respectively dissolving ZnCl2, MnCl2 and K2CO3 in deionized water; mixing a mixed solution of ZnCl2 and MnCl2 with a K2CO3 solution to obtain a sediment; and aging the sediment, then filtering, washing and drying, and then calcining to obtain a manganese carbonate / zinc oxide compound solid base catalyst, wherein raw materials comprise 5.7-8.5 parts by weight of ZnCl2, 10-16.5 parts of MnCl2, and 18-22 parts of K2CO3. The solid base catalyst disclosed by the invention is capable of efficiently catalyzing transesterification reaction under the reaction condition of subcritical methanol, wherein the conversion rate is maximally more than 99 percent. Meanwhile, the solid base catalyst has the advantages of heterogeneous catalysis and supercritical reaction, and is easy to separate; glycerinum and biodiesel are easily refined; the transesterification rate is high.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a solid base catalyst for preparing biodiesel. Background technique [0002] Biodiesel refers to clean alternative fuels produced from renewable biological resources such as plants and animal fats that can be used in compression ignition engines. The main components are ester compounds formed by long-chain saturated unsaturated fatty acids such as palmitic acid, stearic acid, and oleic acid with methanol or ethanol. Biodiesel has the characteristics of high cetane number, better anti-knock performance than petrochemical diesel; non-toxic, does not contain aromatic components; high flash point, which is conducive to transportation safety; good low temperature fluidity, can be widely used and so on. Moreover, biodiesel can be directly used with existing diesel engines and blended with petrochemical diesel in a certain proportion, which can reduce fuel consumption, im...

Claims

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Application Information

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IPC IPC(8): B01J27/232C11C3/10C10L1/02
CPCY02E50/10
Inventor 刘慧万亮
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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