Process for producing biological diesel oil

A biodiesel and catalyst technology, which is applied in the preparation of liquid hydrocarbon mixtures, biofuels, biological raw materials, etc., can solve the problems of complicated post-processing, low production costs, and environmental pollution, and achieve simplified post-processing and low production costs , the effect of a small amount of catalyst

Inactive Publication Date: 2008-10-29
BOHAI UNIV
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a kind of preparation method of biodiesel, solve the post-treatment complication brought by traditional stirring method and traditional liquid acid and alkali as catalyst, pollute the environment and other problems, adopt nano-whisker and ultrasonic strengthening technology, High yield, suitable for industrial production, low production cost, wide source of raw materials, easy storage, safe and pollution-free

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 10ml of rapeseed oil and 60ml of methanol into a 100ml Erlenmeyer flask, add 0.17g of nano-calcium sulfate whiskers, set the temperature at 60°C, and react under 30KHz ultrasonic waves for 20min. After the reaction was completed, the reaction solution was poured into a separatory funnel, left to stand, and divided into upper and lower layers.

[0021] After the crude product in the lower layer is filtered by a vacuum pump, m=9.43g of biodiesel is obtained, and the yield can reach 98.07%. After suction filtration, the catalyst on the filter paper was recovered simultaneously; the upper layer mixture was subjected to atmospheric distillation to recover methanol and obtain a glycerin by-product with a purity of 88%.

Embodiment 2

[0023] Put 10ml of soybean oil and 40ml of ethanol into a 100ml Erlenmeyer flask, add 0.09g of nano-magnesium sulfate whiskers, set the temperature at 65°C, and react under 30KHz ultrasonic waves for 40min. After the reaction was completed, the reaction solution was poured into a separatory funnel, left to stand, and divided into upper and lower layers.

[0024] After the crude product in the lower layer is filtered by a vacuum pump, biodiesel m=9.21g can be obtained, and the yield can reach 98.35%. After suction filtration, the catalyst on the filter paper was recovered simultaneously; the upper layer mixture was subjected to atmospheric distillation to recover methanol and obtain a glycerin by-product with a purity of 89%.

Embodiment 3

[0026] Put 10ml jatropha seed oil and 60ml ethanol into a 100ml Erlenmeyer flask, add 0.13g nano-calcium carbonate whiskers or nano-magnesium carbonate whiskers, set the temperature at 55°C, and react under 25KHz ultrasonic waves for 30min. After the reaction was completed, the reaction solution was poured into a separatory funnel, left to stand, and divided into upper and lower layers.

[0027] After the crude product in the lower layer is filtered by a vacuum pump, biodiesel m=9.06g can be obtained, and the yield can reach 97.56%. After suction filtration, the catalyst on the filter paper was recovered simultaneously; the upper layer mixture was subjected to atmospheric distillation to recover methanol and obtain a glycerin by-product with a purity of 86%.

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Abstract

A preparation method of bio-diesel for solving the problems such as complex post-treatment and environmental pollution existing in the conventional method comprises the following steps: mixing animal and plant oil or waste grease with methanol or ethanol in the presence of nanometer crystal whisker catalyst with an amount of 0.1 to 5% the weight of the raw material oil and an alcohol/oil molar ratio of 4:1 to 10:1, carrying out ultrasonic transesterification reaction, standing the reactive mixture to obtain an upper layer containing the mixture liquid of glycerol and residual methanol or ethanol and a lower layer containing crude product, and pump-filtering the lower crude product layer to obtain the bio-diesel. The preparation method of the invention is efficient, safe and pollution-free and is conducive to industrial production, and meets the requirement of people for the environment. The yield of the bio-diesel prepared by the method is above 97%. The method has the advantages of simple operation, less consumption of catalyst, short time, greatly simplified post-treatment process, no environmental pollution, safe and reliable operation, and low production cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing biodiesel. Background technique [0002] Transesterification is widely used in oil modification and synthesis of organic intermediates. In recent years, with the increasingly severe global energy shortage and environmental deterioration, controlling vehicle exhaust emissions and protecting the natural environment on which human beings depend have become urgent problems for human beings to solve. From the perspective of environmental protection and resource strategy, energy researchers from all over the world are actively exploring and developing alternative fuels and renewable energy sources. Biodiesel is one of them, and transesterification is an important technology for preparing biodiesel. In the traditional transesterification process, chemical catalysts are mostly used, such as sodium hydroxide, potassium hydroxide, sodium methoxide or concentrated sulfuric acid, etc. These catalysts require pretrea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 钱建华刘琳邢锦娟朱江丽
Owner BOHAI UNIV
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