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Method for producing biodiesel by catalyzing microalgae oil by ultrasonic-assisted ionic liquid

An ionic liquid, catalyzing microalgae technology, applied in the direction of fat oil/fat production, biofuel, fat production, etc., can solve the problems of low extraction efficiency, environmental pollution, high cost, reduce reaction time, reduce production cost, and save production cost effect

Inactive Publication Date: 2012-10-17
DAQING BRANCH OF HEILONGJIANG ACAD OF SCI
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for producing biodiesel from microalgae oil catalyzed by ultrasonic-assisted ionic liquid in order to solve the problems of low extraction efficiency, high cost and serious environmental pollution of the reagents used in the current biodiesel preparation method

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  • Method for producing biodiesel by catalyzing microalgae oil by ultrasonic-assisted ionic liquid

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specific Embodiment approach 1

[0015] Specific embodiment one: the method for a kind of ultrasonic-assisted ionic liquid catalyzed microalgae oil production biodiesel of the present embodiment is to carry out according to the following steps: one, the molar ratio of N-methylimidazole and chlorinated n-butane is 1 : Mix the ratio of 1~2 evenly, under the condition of nitrogen protection, stir and react at 70℃~80℃ for 40~50h, after cooling and crystallizing, the solid [BMIM]Cl can be obtained; 2. The [BMIM]Cl obtained in step 1 ]Cl and NaBF 4 Mix the mixture with a molar ratio of 1:1 to obtain a mixture; mix the mixture with acetone at a mass volume ratio of 1g:10~30mL, stir and react at room temperature for 18~24h to obtain a solid-liquid mixture, and mix the solid-liquid mixture After filtration, the filtrate was collected for vacuum distillation, and the collected fraction was dried for 10-15 hours at a vacuum of 0.09-0.092MPa and a temperature of 60-80°C to obtain the ionic liquid [BMIM]BF 4 3. Mix the m...

specific Embodiment approach 2

[0017] Embodiment 2: This embodiment differs from Embodiment 1 in that the stirring speed in Step 1 and Step 2 is 300-800 r / min. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the vacuum distillation described in Step 2 and Step 4 refers to distillation at a pressure of 0.09~0.092Mpa for 0.5~2.5h. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for producing biodiesel from microalgae oil, particularly a method for producing biodiesel by catalyzing microalgae oil by an ultrasonic-assisted ionic liquid. The invention aims to solve the severe problems of low extraction efficiency, high cost and environmental pollution of reagents in the existing biodiesel preparation method. The method provided by the invention comprises the following steps: 1. preparing [BMIM]Cl, mixing the [BMIM]Cl and NaBF4 in a mol ratio of 1:1, adding acetone to react for 18-24 hours, filtering, and carrying out vacuum distillation to obtain an ionic liquid [BMIM]BF4; and 2. mixing the microalgae oil with methanol or ethanol, adding the mixture into the ionic liquid [BMIM]BF4, carrying out ultrasonic treatment for 20-50 minutes, extracting, collecting the supernatant solution, and carrying out vacuum distillation to obtain the biodiesel. The biodiesel yield of the invention is greater than 90%. The invention is applicable to the field of biodiesel preparation.

Description

technical field [0001] The invention relates to a method for producing biodiesel from microalgae oil. Background technique [0002] With the depletion of petroleum resources and the deterioration of the ecological environment caused by the combustion of fossil fuels, biodiesel has attracted widespread attention as an environmentally friendly renewable energy. The production of biodiesel is to use oil as raw material to carry out esterification reaction with methanol or ethanol to prepare the corresponding fatty acid methyl ester and ethyl ester, that is, biodiesel. [0003] At present, there are some urgent problems to be solved in the production of biodiesel in terms of raw materials and preparation methods: [0004] 1. Traditional biodiesel uses soybeans, corn, palm trees, jatropha and other crops as raw materials. The biggest hidden danger lies in "competition with food for land", which leads to rising food prices. The production of biodiesel from waste animal fats, cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/04C11B1/04C11B1/10C11B3/12C10L1/02
CPCY02E50/13Y02E50/10
Inventor 刘宇峰刘玉姬妍茹杨庆丽高媛杨贺晴
Owner DAQING BRANCH OF HEILONGJIANG ACAD OF SCI
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