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Production technology for preparing biodiesel by solid magnetic catalyst

A magnetic catalyst, biodiesel technology, applied in the preparation of biological raw materials, biofuels, liquid hydrocarbon mixtures, etc., can solve problems such as pollution of the environment, and achieve the effects of easy recovery, convenient recovery and cost saving

Inactive Publication Date: 2007-01-10
NANCHANG UNIV
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a technology for the preparation of biodiesel by solid magnetic catalyst catalysis, the solid magnetic catalyst can be recycled, and solve the problems of polluting the environment caused by the use of traditional catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: raw materials: palm oil, solid magnetic catalyst, methanol.

[0023] Solid magnetic catalysts include MgO, Al calculated as oxides 2 o 3 , Fe 2 o 3 , and its composition is 5:1:4 according to the elemental molar ratio of Mg, Al, and Fe.

[0024] The solid magnetic catalyst was obtained as follows: 4 moles of FeSO 4 ·7H 2 O, 2 moles of Fe 2 (SO 4 )3 Add 10 moles of distilled water, control the temperature at 50°C, slowly and evenly add 0.8 moles of ammonia water in 2 hours, stir, and age for 1 hour after dripping, to obtain an oily black precipitate, pour the supernatant, and then add distilled water Repeatedly wash the precipitate to be neutral and free of SO 4 2- , to obtain intermediate A for subsequent use; add crushed MgO, Al in intermediate A according to the element molar ratio of Mg, Al, Fe 2 o 3 , stir into a paste, then add 15 moles of distilled water, slowly and evenly add 4 moles of ammonia water in 4 hours, stir, after dripping, rais...

Embodiment 2

[0026] Embodiment 2: raw materials: soybean oil, solid magnetic catalyst, methanol.

[0027] Solid magnetic catalysts include MgO, Al calculated as oxides 2 o 3 , Fe 2 o 3 , its composition is 8:5:3 according to the elemental molar ratio of Mg, Al, Fe; All the other are the same as embodiment one.

[0028] Add 50.0 kg of soybean oil and 8.0 kg of methanol into the reactor, stir, add 2.0 kg of solid magnetic catalyst, and carry out transesterification at 70°C for 4.0 hours. After the reaction, the solid magnetic catalyst was reclaimed under the action of a magnetic field, and then the reaction mixture was left to stand for stratification. The upper layer was the crude product of biodiesel, and the lower layer was a mixture of glycerol and methanol. After the upper layer was purified, 48.2 kg of biodiesel was obtained.

[0029] The recovered solid magnetic catalyst can be reused after calcining at 50°C for 2 hours. Another 50.0 kg of soybean oil and 8.0 kg of methanol were ...

Embodiment 3

[0031] Embodiment three: raw materials: cottonseed oil, solid magnetic catalyst, ethanol.

[0032] Solid magnetic catalysts include MgO, Al calculated as oxides 2 o 3 , Fe 2 o 3 , its composition is 12:3:5 according to the elemental molar ratio of Mg, Al, Fe; All the other are the same as embodiment one.

[0033] Add 50.0 kg of cottonseed oil and 20.0 kg of ethanol into the reactor, stir, add 4.0 kg of solid magnetic catalyst, and carry out transesterification at 50.0°C for 3.0 hours. After the reaction, the solid magnetic catalyst was recovered under the action of the magnetic field, and then the reaction mixture was allowed to stand for stratification. The upper layer was the crude product of biodiesel, and the lower layer was a mixture of glycerol and ethanol. After the upper layer was purified, 48.5 kg of biodiesel was obtained.

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Abstract

The invention relates to the production technology used solid magnetism catalysis to make biological diesel oil. It mixes low carbon alcohol with animal and vegetable oils to do ester interchange reaction by catalyst at certain temperature. After it has finished, the upper layer is the coarse biological diesel oil; and the under is the mixture of glycerol and low carbon alcohol. The upper layer coarse product is purified at the following conditions: the mol ratio of the carbon alcohol and the animal and vegetable oils is 3-40:1; the catalyst is the solid magnetism; the ester interchange is at 40-100 centigrade degree for 1-5 hours; and the weight of the added catalyst are 1%-10% of the animal and vegetable oils. The solid magnetism catalysis contains Ni2O3, Co2O3, and Fe2O3. Thus, it can separate from the liquid state biological diesel oil well and reduce the pollution. And it can be used circularly and has no corrode for conversion unit.

Description

technical field [0001] The invention relates to a production technology for preparing biodiesel, in particular to a production technology for preparing biodiesel with a solid magnetic catalyst. The present invention uses vegetable oil as raw material. Background technique [0002] With the development of modern high technology and industry and commerce, people's use of oil has also increased, and the fossil energy reserves such as coal and oil that can be developed and utilized on the earth will be within 200 years and 30 to 40 years respectively. If it is exhausted, natural gas can only be used for 60 years according to the reserve-production ratio. Therefore, the problem of energy shortage will plague the development of human society for a long time. At the same time, the environmental pollution caused by the exhaust gas emitted after oil combustion is also a major problem facing human beings, especially CO 2 content has been increasing significantly. Therefore, the dev...

Claims

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Application Information

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IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 阮榕生高荫榆林向阳陈文伟刘玉环白松
Owner NANCHANG UNIV
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