Method for modifying biological diesel oil

A biodiesel and modification technology, which is applied in the preparation of biological raw materials, biofuels, and liquid hydrocarbon mixtures, etc., can solve the problems that the cost reduction effect of biodiesel is not obvious, and achieve low production costs and increase cetane number. , cheap effect

Inactive Publication Date: 2006-11-22
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors of this patent have shown through experiments that with the increase of methanol addition, the amount of surfactant will increase thereupon. When the amount of methanol reaches 40%, the addition of relevant surfactant will exceed more than 10%. The price of the surfactant is generally more expensive, which will offset the cost reduction effect of methanol due to the addition of a large amount of surfactant; if a small amount of methanol is added, such as when the amount of methanol added is 5% to 15% of the amount of biodiesel, The effect of reducing the cost of biodiesel is not obvious
However, there is no report on the chemical modification of biodiesel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 200g of biodiesel to a three-necked flask, then add 30g of formic acid and sulfuric acid, heat to 70°C under stirring, add 15g of concentrated nitric acid dropwise within 0.1 hour, continue constant temperature reaction for 0.5 hours, take out the product and let it stand for stratification, and separate the upper layer of liquid Take it out, neutralize it with lye to pH=7~8, wash twice with distilled water, then stand for stratification, take the upper layer liquid and dry it under reduced pressure at 50℃ to obtain the product modified biodiesel 210g, yield Is 105%.

[0019] The resultant product is miscible with methanol and it can be miscible with methanol in any ratio. After testing, the cetane number is above 65.

Embodiment 2

[0021] Add 200g of biodiesel to a three-necked flask, then add 45g of formic acid and phosphoric acid, heat to 50°C under stirring, add 10g of concentrated sulfuric acid dropwise within 1 hour, continue constant temperature reaction for 2 hours, take out the product and let it stand for stratification, and separate the upper layer of liquid Take it out, neutralize it with lye to pH=7~8, wash twice with distilled water, then stand for stratification, take the upper layer liquid and dry it under reduced pressure at 50℃ to obtain the product modified biodiesel 205g, yield Is 102.5%.

[0022] The resultant product has been miscible with methanol and it can be miscible with methanol in any ratio. After testing, the cetane number is more than 60.

Embodiment 3

[0024] In a three-necked flask, add 200g of biodiesel, then add 50g of acetic acid and phosphoric acid, heat to 40℃ under stirring, add 7g of concentrated sulfuric acid dropwise within 1 hour, continue constant temperature reaction for 4 hours, take out the product and let it stand for stratification, and separate the upper liquid Take it out, neutralize it with lye to pH=7-8, wash twice with distilled water, then stand for stratification, take the upper layer of liquid and perform vacuum distillation and drying at 50°C to obtain the product modified biodiesel 215g, yield Is 107.5%.

[0025] The resultant product has been miscible with methanol and it can be miscible with methanol in any ratio. After testing, the cetane number is more than 60.

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PUM

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Abstract

The invention discloses a modified method of biological diesel, which comprises the following steps: adding organic carboxyl modifier and inorganic acid modifier and biological diesel of plant oil in the autoclave; stirring; heating to 30-80 deg.c; adding oxidation modifier at even speed within 0.1-10 h; reacting for 0.5-5 h under constant temperature; stewing to laminate; neutralizing the upper layer liquid to 7-8 pH value; washing and drying to generate the product. The invention creates excellent economical environment, which changes the present condition of vehicle diesel to depend oil diesel.

Description

Technical field [0001] The invention relates to a method for the preparation or modification of diesel fuel, in particular to a method for modifying the renewable energy-biodiesel by using a chemical method. technical background [0002] Biodiesel is renewable, environmentally friendly, and the engine emission index is in addition to NO X It can meet the European emission standard No. 3, and the existing diesel engine can be directly used, which is one of the most suitable substitutes for petroleum diesel. There are currently four main methods for preparing biodiesel: dilution, pyrolysis, microemulsification and transesterification. Transesterification methods include homogeneous acid-base catalysis, heterogeneous acid-base catalysis, biocatalysis and supercritical methods. Among them, the homogeneous base catalysis method in the transesterification method has short reaction time and low production cost, and is currently the most commonly used method. [0003] However, the raw ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G17/06C10G3/00
CPCY02E50/10Y02P30/20
Inventor 李忠张小兵米杰鲍卫仁谢克昌
Owner TAIYUAN UNIV OF TECH
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