CN113025399B - Preparation method of biodiesel with high oxidation stability - Google Patents

Preparation method of biodiesel with high oxidation stability Download PDF

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Publication number
CN113025399B
CN113025399B CN202110311824.0A CN202110311824A CN113025399B CN 113025399 B CN113025399 B CN 113025399B CN 202110311824 A CN202110311824 A CN 202110311824A CN 113025399 B CN113025399 B CN 113025399B
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cooking oil
illegal cooking
biodiesel
oxidation stability
high oxidation
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CN113025399A (en
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石健君
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Hubei Bimei New Energy Technology Co ltd
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Hubei Bimei New Energy Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
    • C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
    • C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
    • C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
    • C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
    • C11C3/10—Ester interchange
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel

Abstract

The invention provides a preparation method of biodiesel with high oxidation stability, which comprises the following steps: s1: recovering and collecting waste swill-cooked dirty oil, filtering and removing impurities for later use; s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of illegal cooking oil, mixing an antioxidant until an illegal cooking oil mixture is formed, and standing; s3: adding a solid acid catalyst, a mixture of ethanol and illegal cooking oil and the rest of illegal cooking oil with the other half mass into a reaction kettle, carrying out pre-esterification and ester exchange reaction, removing the redundant ethanol by adopting a reduced pressure distillation mode after the reaction is finished, and heating and drying by hot air to obtain the required biodiesel with high oxidation stability; the antioxidant comprises the following components in parts by weight: 2,6-di-tert-butylhydroquinone 1-5 parts, and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid 0.5-1.5 parts. The invention provides a preparation method of biodiesel with stable quality, high utilization rate, cleanness, greenness and high oxidation stability.

Description

Preparation method of biodiesel with high oxidation stability
Technical Field
The invention relates to the technical field of biodiesel preparation, in particular to a preparation method of biodiesel with high oxidation stability.
Background
Biodiesel is a renewable, clean and environment-friendly green energy source and is considered as a good substitute for petroleum diesel. However, the main component of the biodiesel is fatty acid methyl ester, wherein the content of unsaturated fatty acid methyl ester containing carbon-carbon double bonds or triple bonds is more than half, so that the biodiesel is easy to oxidize and deteriorate. In the production and storage processes of the biodiesel, metal equipment and containers are inevitably contacted, so that the biodiesel contains metal ion impurities. Transition metal ions in the biodiesel can catalyze and accelerate oxidation reaction, so that the oxidation stability of the biodiesel is deteriorated, the ash content and mechanical impurities of the biodiesel are increased, mechanical abrasion is increased, particularly, insoluble substances are generated in an oil product, the acid value and the viscosity are increased, the problems of corrosion of an engine system, blockage of an oil pipe, an oil pump, unstable engine power and the like are further caused, and the difficulty is caused in the actual use and storage of the biodiesel.
Therefore, a method for preparing biodiesel with stable quality, high utilization rate, cleanness, greenness and high oxidation stability needs to be researched.
Disclosure of Invention
The invention aims to provide a preparation method of biodiesel with stable quality, high utilization rate, cleanness, greenness and high oxidation stability.
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of biodiesel with high oxidation stability comprises the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of illegal cooking oil, uniformly mixing an antioxidant to form an illegal cooking oil mixture, and standing;
s3: adding a solid acid catalyst, ethanol, the illegal cooking oil mixture prepared in the step S2 and the rest of illegal cooking oil liquid with the other mass in the step S1 into a reaction kettle, carrying out pre-esterification and ester exchange reaction, removing excessive ethanol by adopting a reduced pressure distillation mode after the reaction is finished, and heating and drying by hot air to obtain the biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 2,6-di-tert-butylhydroquinone 1-5 parts, and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid 0.5-1.5 parts.
As a further configuration of the invention, the antioxidant also comprises 0.5-1 part of L-2-amino-1-butanol, and the L-2-amino-1-butanol and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid are added into the heated illegal cooking oil together by weight parts.
As a further setting of the invention, the standing time of the step S2 is 30-60min.
As a further setting of the invention, the antioxidant also comprises 0.3-0.5 part of L-arginine according to parts by weight, and the L-arginine is added into the swill-cooked dirty oil after standing for 20min, stirred and mixed evenly and then kept standing.
As a further setting of the invention, in the step S2, the temperature of the illegal cooking oil is raised and heated to 40-50 ℃.
As a further configuration of the present invention, the reaction temperature of the pre-esterification and ester exchange reaction in step S3 is 90-100 ℃, and the reaction time is 5-6h.
The invention has the beneficial effects that:
1. the preparation method of the biodiesel with high oxidation stability adopts 2,6-di-tert-butylhydroquinone and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid to effectively improve the antioxidant effect in the biodiesel,2,6-di-tert-butylhydroquinone has active hydroxyl group, and can provide active hydrogen atom for active free radical to terminate active oxidation free radical in biodiesel to reduce oxidation of biodiesel, and 2,6-di-tert-butylhydroquinone cooperates with (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid to reduce metal ion, especially Cu 2+ 、Fe 3+ Equivalent catalytic oxidation effect on biodiesel, the amino and imino electron pair of (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid can effectively capture Cu 2+ 、Fe 3+ And metal ions are chelated to form a stable chelate, so that the decomposition of the metal ions on hydroperoxide is reduced, meanwhile, the consumption of active hydrogen ions produced by 2,6-di-tert-butyl hydroquinone due to side reaction generated after the active hydrogen ions are catalyzed by the metal ions is reduced, the antioxidant effect of 2,6-di-tert-butyl hydroquinone is effectively improved, and finally, the oxidation stability of the biodiesel is effectively improved together.
2. The antioxidant in the preparation method of the biodiesel with high oxidation stability is added with L-2-amino-1-butanol, and the L-2-amino-1-butanol and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid are added into the illegal cooking oil together, so that the hydroxyl functional group of the L-2-amino-1-butanol can form electronic attraction to the active hydrogen atom of (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid, the activity loss instability of the active hydrogen atom is further improved, the activity of the (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid as the antioxidant is effectively improved, the antioxidant stability is effectively improved, the oxidation of the biodiesel is improved, metal ions can be consumed by the amino group of the biodiesel, and the antioxidant effect of simultaneously consuming the peroxy radical of the biodiesel and the metal ions is realized.
3. The antioxidant in the preparation method of the biodiesel with high oxidation stability is added with L-arginine, and the amino group of the L-arginine and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid can further chelate and consume metal ions in the biodiesel together, so that the oxidation stability of the biodiesel after contacting the metal ions is improved.
4. The preparation method of the biodiesel with high oxidation stability adopts a mode of uniformly mixing the antioxidant and hot raw material waste oil at 40-50 ℃ by mutual reaction, so that the contact area of the antioxidant and the waste oil is increased, and the antioxidant runs through the preparation process of the reaction product biodiesel all the time.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Example 1
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of biodiesel with high oxidation stability comprises the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of illegal cooking oil to 40-50 ℃, uniformly mixing an antioxidant into the mixture to form an illegal cooking oil mixture, and standing for 30min;
s3: adding a solid acid catalyst, ethanol, the illegal cooking oil mixture prepared in the step S2 and the rest of illegal cooking oil liquid with the other half mass in the step S1 into a reaction kettle, performing pre-esterification and ester exchange reaction at the temperature of 90 ℃, removing the rest ethanol by adopting a reduced pressure distillation mode after the reaction is finished for 5 hours, and heating and hot air drying to obtain the biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 2,6-di-tert-butylhydroquinone 1 part, (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid 0.5 part, L-2-amino-1-butanol 0.5 part, L-arginine 0.3 part, L-2-amino-1-butanol and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid are added into heated illegal cooking oil together, and the L-arginine is added into the illegal cooking oil after standing for 20min, stirred and mixed uniformly and then kept standing.
Example 2
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of biodiesel with high oxidation stability comprises the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of illegal cooking oil to 40-50 ℃, uniformly mixing an antioxidant into the mixture to form an illegal cooking oil mixture, and standing for 60min;
s3: adding a solid acid catalyst, ethanol, the illegal cooking oil mixture prepared in the step S2 and the rest of illegal cooking oil liquid with the other half mass in the step S1 into a reaction kettle, performing pre-esterification and ester exchange reaction at the temperature of 100 ℃, removing the rest ethanol by adopting a reduced pressure distillation mode after the reaction is finished for 6 hours, and heating and hot air drying to obtain the biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 2,6-di-tert-butylhydroquinone 5 parts, (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid 1.5 parts, L-2-amino-1-butanol 1 part, L-arginine 0.5 part, L-2-amino-1-butanol and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid are added into heated illegal cooking oil, and the L-arginine is added into the illegal cooking oil after standing for 20min, stirred, mixed uniformly and then kept standing.
Example 3
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of biodiesel with high oxidation stability comprises the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of illegal cooking oil to 40-50 ℃, uniformly mixing an antioxidant into the mixture to form an illegal cooking oil mixture, and standing for 45min;
s3: adding a solid acid catalyst, ethanol, the illegal cooking oil mixture prepared in the step S2 and the rest of illegal cooking oil liquid with the other half mass in the step S1 into a reaction kettle, performing pre-esterification and ester exchange reaction at the temperature of 95 ℃, removing excessive ethanol by adopting a reduced pressure distillation mode after the reaction is finished for 5.5 hours, and heating and drying by hot air to obtain the biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 2,6-di-tert-butylhydroquinone 3 parts, (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid 1 part, L-2-amino-1-butanol 0.8 part, L-arginine 0.4 part, L-2-amino-1-butanol and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid are added into heated illegal cooking oil, and the L-arginine is added into the illegal cooking oil after standing for 20min, stirred, mixed uniformly and then kept standing.
Example 4
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of biodiesel with high oxidation stability comprises the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of illegal cooking oil to 40-50 ℃, uniformly mixing an antioxidant into the mixture to form an illegal cooking oil mixture, and standing for 45min;
s3: adding a solid acid catalyst, ethanol, the illegal cooking oil mixture prepared in the step S2 and the rest of illegal cooking oil liquid with the other half mass in the step S1 into a reaction kettle, performing pre-esterification and ester exchange reaction at the temperature of 95 ℃, removing excessive ethanol by adopting a reduced pressure distillation mode after the reaction is finished for 5.5 hours, and heating and drying by hot air to obtain the biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 2,6-di-tert-butylhydroquinone 3 parts, L-2-amino-1-butanol 0.8 part, L-arginine 0.4 part, L-2-amino-1-butanol and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid are added into heated illegal cooking oil, and the L-arginine is added into the illegal cooking oil after standing for 20min, stirred and mixed uniformly and then kept standing.
Example 5
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of biodiesel with high oxidation stability comprises the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of illegal cooking oil to 40-50 ℃, uniformly mixing an antioxidant into the mixture to form an illegal cooking oil mixture, and standing for 45min;
s3: adding a solid acid catalyst, ethanol, the illegal cooking oil mixture prepared in the step S2 and the rest of illegal cooking oil liquid with the other half mass in the step S1 into a reaction kettle, performing pre-esterification and ester exchange reaction at the temperature of 95 ℃, removing excessive ethanol by adopting a reduced pressure distillation mode after the reaction is finished for 5.5 hours, and heating and drying by hot air to obtain the biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 2,6-di-tert-butylhydroquinone 3 parts, R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid 1 part and L-arginine 0.4 part, wherein the L-arginine is added into the illegal cooking oil after standing for 20min, and is stirred, mixed and kept standing.
Example 6
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of biodiesel with high oxidation stability comprises the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of illegal cooking oil to 40-50 ℃, uniformly mixing an antioxidant into the mixture to form an illegal cooking oil mixture, and standing for 45min;
s3: adding a solid acid catalyst, ethanol, the illegal cooking oil mixture prepared in the step S2 and the rest of illegal cooking oil liquid with the other half mass in the step S1 into a reaction kettle, performing pre-esterification and ester exchange reaction at the temperature of 95 ℃, removing excessive ethanol by adopting a reduced pressure distillation mode after the reaction is finished for 5.5 hours, and heating and drying by hot air to obtain the biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 2,6-Di-tert-butylhydroquinone 3 parts, (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid 1 part, L-2-amino-1-butanol 0.8 part, L-2-amino-1-butanol and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid are added together to the heated gutter oil.
Example 7
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of biodiesel with high oxidation stability comprises the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of illegal cooking oil to 40-50 ℃, uniformly mixing an antioxidant into the mixture to form an illegal cooking oil mixture, and standing for 45min;
s3: adding a solid acid catalyst, ethanol, the illegal cooking oil mixture prepared in the step S2 and the rest half mass of illegal cooking oil liquid in the step S1 into a reaction kettle, carrying out pre-esterification and ester exchange reaction at the temperature of 95 ℃, removing redundant ethanol by adopting a reduced pressure distillation mode after the reaction is finished for 5.5 hours, and heating and drying by hot air to obtain the biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 2,6-di-tert-butylhydroquinone 3 parts.
Example 8
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of biodiesel with high oxidation stability comprises the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: adding a solid acid catalyst, ethanol, an antioxidant and the illegal cooking oil prepared in the step S1 into a reaction kettle, carrying out pre-esterification and ester exchange reaction at the temperature of 95 ℃, removing excessive ethanol by adopting a reduced pressure distillation mode after the reaction is finished for 5.5 hours, and heating and drying by hot air to obtain the biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 2,6-di-tert-butylhydroquinone 3 parts, (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid 1 part, L-2-amino-1-butanol 0.8 part, L-arginine 0.4 part, L-2-amino-1-butanol and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid are added into heated illegal cooking oil, and the L-arginine is added into the illegal cooking oil after standing for 20min, stirred, mixed uniformly and then kept standing.
And (3) testing oxidation stability: the oxidation stability of biodiesel was determined by the Racimat method (EN 14112: 2003). Under the conditions of 110 ℃ and 10L/h of air flow, the biodiesel sample is subjected to accelerated oxidation, deionized water is used for absorbing volatile products such as formic acid, acetic acid and the like generated in the oxidation process, and the time of a conductivity mutation point, namely the induction period of the biodiesel, can be deduced from the tangent intersection point or the maximum point of a second derivative of a conductivity curve of water. The measuring instrument is a Wantong 743 type biodiesel oxidation stability measuring instrument.
Examples 1-8, and 10ppm cu2+ were added to each of examples 1-8 to form biodiesel prepared in examples 9-16, and the results of the oxidation stability test using the method described above are shown in table 1 below:
TABLE 1 Oxidation stability test results for the respective samples
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION Induction period/h DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION Induction period/h
Example 1 17.24 Example 9 13.62
Example 2 19.45 Example 10 15.85
Example 3 18.68 Example 11 14.83
Example 4 11.21 Example 12 5.93
Example 5 12.65 Example 13 8.63
Example 6 13.82 Example 14 8.74
Example 7 6.35 Example 15 0.52
Example 8 13.43 Example 16 9.83
The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (6)

1. A preparation method of biodiesel with high oxidation stability is characterized by comprising the following steps:
s1: recovering and collecting waste illegal cooking oil, and filtering and removing impurities to form illegal cooking oil for later use;
s2: dividing the illegal cooking oil liquid prepared in the step S1 into two parts with equal mass, heating one part of the illegal cooking oil liquid, uniformly mixing an antioxidant into the mixture to form an illegal cooking oil mixture, and standing;
s3: adding a solid acid catalyst, ethanol, the illegal cooking oil mixture prepared in the step S2 and the rest half mass of illegal cooking oil liquid in the step S1 into a reaction kettle, carrying out pre-esterification and ester exchange reaction, removing redundant ethanol by adopting a reduced pressure distillation mode after the reaction is finished, and drying by hot air to obtain the required biodiesel with high oxidation stability;
the antioxidant comprises the following components in parts by weight: 1-5 parts of 2, 6-di-tert-butylhydroquinone and 0.5-1.5 parts of (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid.
2. The method for preparing biodiesel with high oxidation stability according to claim 1, wherein the antioxidant further comprises 0.5-1 part by weight of L-2-amino-1-butanol, and the L-2-amino-1-butanol and (R) -5- ((aminoiminomethyl) amino) -2-hydroxypentanoic acid are added together to the heated illegal cooking oil.
3. The method for preparing biodiesel with high oxidation stability according to claim 1, wherein the standing time of step S2 is 30-60min.
4. The method for preparing biodiesel with high oxidation stability as set forth in claim 3, wherein the antioxidant further comprises 0.3-0.5 parts by weight of L-arginine.
5. The method for preparing biodiesel with high oxidation stability according to claim 1, wherein in step S2, illegal cooking oil is heated to 40-50 ℃.
6. The method for preparing biodiesel with high oxidation stability according to claim 1, wherein the reaction temperature of the pre-esterification and ester exchange reaction in the step S3 is 90-100 ℃, and the reaction time is 5-6h.
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CA2629613A1 (en) * 2005-11-23 2007-05-31 Novus International, Inc. Biodiesel fuel compositions having increased oxidative stability
WO2009108851A1 (en) * 2008-02-29 2009-09-03 Novus International Inc. Biodiesel stabilizing compositions
EP2334767B1 (en) * 2008-08-28 2013-05-29 Taminco Fatty ester compositions with improved oxidative stability
CN102618335A (en) * 2012-03-27 2012-08-01 绍兴文理学院 Method for synthetizing biodiesel from waste oil
CN105733713A (en) * 2014-12-12 2016-07-06 上海天之冠可再生能源有限公司 Biodiesel antioxidant and application method thereof

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Denomination of invention: A Preparation Method of Biodiesel with High Oxidation Stability

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