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Process of preparing biological diesel oil

A biodiesel and process technology, applied in the petroleum industry, biological raw materials, biofuels, etc., can solve the problems of demanding moisture content in raw oil, difficult separation of catalysts and products, and large amounts of waste water, so as to avoid saponification reaction and increase added value , the effect of increasing the yield

Inactive Publication Date: 2007-10-24
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

[0015] The purpose of the present invention is to propose a process for preparing biodiesel, which solves the problems that the traditional process has strict requirements on the moisture content of the raw material oil, the separation of the catalyst and the product is difficult, and a large amount of waste water is generated during the product purification process.

Method used

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  • Process of preparing biological diesel oil

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Effect test

Embodiment 1

[0038] Catalyst preparation:

[0039] Weigh 4g of magnesium metal and 98.4g of methanol and place them in a three-necked flask equipped with a stirrer, a thermometer, and a condenser tube, heat the reaction in a water bath, and control the reaction temperature from 40°C to 65°C until all the magnesium metal disappears, forming milky white Magnesium methoxide and methanol solution, timed for 1.5 hours.

[0040] Preparation of biodiesel:

[0041] Slowly add 160g soybean oil (about 0.7% of water content) in above-mentioned solution, continue stirring reaction 3 hours, control reaction temperature is 65 ℃, after reaction finishes, mixture is filtered, and filtrate and filter cake are collected, and filtrate normal pressure distillation, temperature At about 120°C, recover unreacted methanol. Then add 100ml of hot water at 80°C for washing, and dehydrate and refine the crude biodiesel under reduced pressure with a vacuum of 0.07-0.1MPa and a temperature of about 100°C to finally ...

Embodiment 2

[0046]Rapeseed oil was used as raw material to prepare biodiesel, the reaction time was 6 hours, the reaction temperature was 50°C, and the other process conditions were the same as in Example 1. 200g of rapeseed oil, 6g of magnesium, and 128g of methanol yielded 192g of biodiesel with a fatty acid methyl ester content of 97.9%. Catalyst post-treatment water 120ml, methanol 100ml, glycerol 19.2g, yield 96%, purity 96.4%. 9.93 g of magnesium oxide was obtained, and the recovery rate of magnesium was 99.3%.

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Abstract

The invention discloses a making method of biological diesel coproducted glycerine and magnesium oxide through catalyzing plant oil by magnesium carbinol, which is characterized by the following: adopting non-refined plant oil as raw material; using magnesium carbinol as non-even phase catalyst; reacting through ester exchange to obtain the product and glycerine and magnesium oxide as by-product without neutralizing and processing; improving the receiving rate of magnesium oxide without discharging waste liquid.

Description

technical field [0001] The invention relates to the technical field of biodiesel production, in particular to using magnesium methylate as a heterogeneous catalyst, and using the catalyst to prepare biodiesel and co-produce glycerin and magnesium oxide. Background technique [0002] Biodiesel is a renewable energy produced from animal and vegetable oils. It has good fuel performance and excellent environmental protection characteristics, and is a high-quality substitute for petrochemical diesel. With the increasing depletion of petroleum resources and the improvement of people's awareness of environmental protection, biodiesel, as a clean energy source, has attracted widespread attention. The common method for industrial production of biodiesel is the chemical transesterification method, that is, the main component of animal and vegetable oils, triglycerides, undergoes transesterification with low-carbon alcohols (methanol, ethanol, etc.) to generate fatty acid methyl esters...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00C11C3/10
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 陈晴颜涌捷任铮伟黄慨
Owner EAST CHINA UNIV OF SCI & TECH
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