Method for synthesizing biodiesel through efficient catalysis of castor oil and ester exchange

A technology of castor oil ester and synthetic biology, applied in the direction of biofuel, petroleum industry, fatty acid production, etc., can solve the problems of restricting the use and promotion of biodiesel, secondary pollution by-products, poor low-temperature fluidity, etc., to improve stability and Catalytic activity, overcoming the effect of low catalytic activity and low freezing point

Inactive Publication Date: 2018-11-16
张家港知航信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Castor oil generally uses strong base or strong acid as a catalyst to prepare biodiesel. The traditional strong base and strong acid catalyzed preparation of biodiesel mostly has low catalytic efficiency, low output, deep color, easy deterioration, long reaction time, corrosion equipment, complex process, and reaction. Disadv

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  • Method for synthesizing biodiesel through efficient catalysis of castor oil and ester exchange

Examples

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Example Embodiment

[0031] Example 1

[0032] A method for efficiently catalyzing castor oil transesterification to synthesize biodiesel oil, comprising the following steps:

[0033] (1) Add castor oil and 85°C hot water into the treatment tank, the amount of hot water added is 30% of the weight of castor oil, stir at high speed for 20 minutes, let it stand for stratification, take the upper layer of oil and then perform centrifugation;

[0034] (2) Add the grease obtained after centrifugation to the agitator, and then add a treatment agent composed of polyacrylamide and activated clay with a mass ratio of 1:2. The amount of the treatment agent added is 3% of the weight of castor oil, Heat up to 100°C, keep warm and stir for 15 minutes, filter and separate to obtain pure castor oil;

[0035] (3) Put pure castor oil, methanol and catalyst into the reactor according to the mass ratio of 100:60:1, react at a temperature of 100°C and a speed of 250r / min for 1.5h, centrifuge, let stand and separate i...

Example Embodiment

[0038] Example 2

[0039] A method for efficiently catalyzing castor oil transesterification to synthesize biodiesel oil, comprising the following steps:

[0040] (1) Add castor oil and 90°C hot water into the treatment tank, the amount of hot water added is 25% of the weight of castor oil, stir at high speed for 30 minutes, let stand for stratification, take the upper layer of oil and then carry out centrifugation;

[0041] (2) Add the grease obtained after centrifugation to the agitator, and then add a treatment agent composed of polyacrylamide and activated clay with a mass ratio of 1:3. The amount of the treatment agent added is 2% of the weight of castor oil, Heat up to 90°C, keep warm and stir for 20 minutes, filter and separate to obtain pure castor oil;

[0042] (3) Put pure castor oil, methanol and catalyst into the reactor at a mass ratio of 100:50:1.2, react for 3 hours at a temperature of 80°C and a rotation speed of 300r / min, centrifuge, stand to separate layers, a...

Example Embodiment

[0045] Example 3

[0046] A method for efficiently catalyzing castor oil transesterification to synthesize biodiesel oil, comprising the following steps:

[0047] (1) Add castor oil and 80°C hot water into the treatment tank, the amount of hot water added is 35% of the weight of castor oil, stir at high speed for 20 minutes, let stand for stratification, take the upper layer of oil and then carry out centrifugation;

[0048] (2) Add the grease obtained after centrifugation to the agitator, and then add a treatment agent composed of polyacrylamide and activated clay with a mass ratio of 1:3. The amount of the treatment agent added is 3.2% of the weight of castor oil, Heat up to 100°C, keep warm and stir for 10 minutes, filter and separate to obtain pure castor oil;

[0049] (3) Put pure castor oil, methanol and catalyst into the reactor according to the mass ratio of 100:55:1.5, react at a temperature of 100°C and a speed of 150r / min for 1 hour, centrifuge, stand and separate ...

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Abstract

The invention discloses a method for synthesizing biodiesel through efficient catalysis of castor oil and ester exchange. The method comprises the following steps of adding the castor oil and hot water in a treatment tank, standing for layering, taking upper-layer grease and then carrying out centrifugal separation; adding a treating agent prepared from polyacrylamide and activated clay in the grease to treat to obtain pure castor oil; adding the pure castor oil, methyl alcohol and a catalyst in a reaction kettle to perform esterification, centrifuging, and standing for layering, wherein the upper layer is a biodiesel crude product, and the catalyst is prepared from tetra(p-carboxyphenyl)metalloporphyrin and aluminum oxide; adding the biodiesel crude product, methylethanolamine and ethyl alcohol in a rectifying tower, rectifying to perform deacidifying treatment, then adding a pour point depressant and a surface active agent, and mixing uniformly at a high speed to obtain a biodiesel product. The biodiesel prepared by the method has the advantages of low condensation point, low acid value, high flash point, good stability, light color, high purity, high cetane value, high burning efficiency, wide raw material sources, low cost and like, the industrial production is easy to achieve, and the market prospect is broad.

Description

technical field [0001] The invention belongs to the technical field of biodiesel, in particular to a method for efficiently catalyzing castor oil transesterification to synthesize biodiesel. Background technique [0002] With the rapid development of our country's economy, the massive burning of fossil fuels has caused serious impacts on the environment and people's lives. Limited fossil energy and increasingly serious environmental problems make people urgently need a sustainable green energy. Biodiesel refers to oil crops such as soybeans, rapeseed, cotton, palm, etc., wild oil plants and engineering microalgae and other aquatic vegetable oils, animal fats, and catering waste oils, etc. Renewable diesel fuel to replace petrodiesel. Biodiesel has many advantages. First of all, it has a wide range of raw materials and low price, and it is a renewable energy source; secondly, biodiesel is non-toxic, low in sulfur content, green and environmentally friendly, and is of great ...

Claims

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Application Information

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IPC IPC(8): C11C3/10C11C1/10C10L1/02
CPCC10L1/02C11C1/10C11C3/10Y02E50/10
Inventor 祝城宗
Owner 张家港知航信息科技有限公司
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