CN103571637A - Method for preparing biodiesel from waste cooking oil - Google Patents
Method for preparing biodiesel from waste cooking oil Download PDFInfo
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- CN103571637A CN103571637A CN201210268301.3A CN201210268301A CN103571637A CN 103571637 A CN103571637 A CN 103571637A CN 201210268301 A CN201210268301 A CN 201210268301A CN 103571637 A CN103571637 A CN 103571637A
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- oil
- biodiesel
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- 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
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Abstract
A method for preparing biodiesel from waste cooking oil comprises the following steps: 1. heating raw material oil to remove water until no bubble gives off, cooling the oil, and filtering residues in the oil; 2. performing a transesterification reaction by the following two steps: firstly, pretreating the raw materials with concentrated H2SO4 as a catalyst under the condition that the mass ratio of alcohol to oil is 0.3, the using amount of the catalyst is 1%, the reaction time is 0.6 h, and the reaction temperature is 60 DEG C; secondly, preparing biodiesel by base catalysis of the pretreated product under the condition that the mass ratio of alcohol to oil is 0.2, the using amount of the catalyst is 0.8%, the reaction time is 0.5 h, and the reaction temperature is 65 DEG C; 3. adding an acid into the crude biodiesel to neutralize the catalyst, repeatedly washing with distilled water, then heating to remove water, and finally performing reduced pressure distillation of the crude biodiesel to obtain a yellow and transparent oil product which is the refined biodiesel. The beneficial effect of the invention is that waste oil grease is converted into biodiesel, which is an effective approach for changing wastes into valuables, saving energy, and reducing pollution.
Description
Technical field
The present invention relates to chemical industry energy field, specifically a kind of method of utilizing biodiesel to prepare biofuel.
Background technology
Biofuel is a kind of environment friendly fuel that can substitute ordinary diesel oil, and it is longer chain fatty acid methyl esters (FAME) or the ethyl ester (FAEE) through being synthesized into by reproducible glyceride stock.Biofuel sulphur content is extremely low, and aromatic hydrocarbon content is few, and oxygen level is high, and cetane value is high, and flash-point is high, and waste gas is overflowed few; In the waste gas of overflowing afterwards in burning, micropartical (PM), hydrocarbon polymer (HC) and carbon monoxide content are also few.
Waste oil is commonly called as technical oils, waste oil, sewer oil, hogwash fat, leftover bits and pieces wet goods.This waste oil not only has a strong impact on city appearance environment and citizen's life, but also can cause a large amount of water pollutions.
Summary of the invention
According to above-mentioned weak point, the object of this invention is to provide a kind of method of utilizing biodiesel to prepare biofuel.
Technical scheme of the present invention is: a kind of method of utilizing biodiesel to prepare biofuel, and it includes: 1, pre-treatment: by stock oil heating, dewater to emitting without bubble; Cooling oil product, the residue with in cotton gauze filter oil, carries out the pre-esterification of methyl alcohol; 2, transesterification reaction: by a certain percentage oil, methyl alcohol and catalyzer after filtering are added in the there-necked flask that is connected to prolong, be heated to preset temperature, ask while reacting a section, move in separating funnel stratification after liquid cooling.Discharge lower floor liquid, supernatant liquid is coarse biodiesel; 3, refining: in coarse biodiesel, add sour catalyst neutralisation, with distilled water, repeatedly clean, then heating dewaters.Finally coarse biodiesel is carried out to underpressure distillation, the yellow transparent oil product obtaining is refining biodiesel.
Preferably: described transesterification reaction is divided into 2 footworks: the dense H of the first step
2sO
4make catalyzer raw material is carried out to pre-treatment, its condition is that alcohol oil quality is than 0.2-0.6, catalyst levels 1-2%, reaction times 0.5-1h, temperature of reaction 60-70 ℃; Second step is prepared biofuel with the pretreated product of base catalysis, its condition be alcohol oil quality than 0.2-0.3, catalyst levels 0.5-1.0%, reaction times 0.5-1h, temperature of reaction 60-70 ℃.
The invention has the beneficial effects as follows: by waste oil change into biofuel be one turn waste into wealth, effective way that save energy, minimizing are polluted.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Embodiment 1
Utilize biodiesel to prepare a method for biofuel, it includes: 1, pre-treatment: by stock oil heating, dewater to emitting without bubble; Cooling oil product, the residue with in cotton gauze filter oil, carries out the pre-esterification of methyl alcohol.2, transesterification reaction: by a certain percentage oil, methyl alcohol and catalyzer after filtering are added in the there-necked flask that is connected to prolong, be heated to preset temperature, ask while reacting a section, move in separating funnel stratification after liquid cooling.Discharge lower floor liquid, supernatant liquid is coarse biodiesel.Wherein transesterification reaction is divided into 2 footworks: the dense H of the first step
2sO
4make catalyzer raw material is carried out to pre-treatment, its condition is alcohol oil quality than 0.3,60 ℃ of catalyst levelss 1%, reaction times 0.6h, temperature of reaction; Second step is prepared biofuel with the pretreated product of base catalysis, its condition be alcohol oil quality than 0.2, catalyst levels 0.8%, reaction times 0.5h, 65 ℃ of temperature of reaction.3, refining: in coarse biodiesel, add sour catalyst neutralisation, with distilled water, repeatedly clean, then heating dewaters.Finally coarse biodiesel is carried out to underpressure distillation, the yellow transparent oil product obtaining is refining biodiesel, and now, the yield of biofuel is 86.73%.
Embodiment 2
Other steps are constant, change transesterification reaction condition: the dense H of the first step
2sO
4make catalyzer raw material is carried out to pre-treatment, its condition is alcohol oil quality than 0.5,65 ℃ of catalyst levelss 1.5%, reaction times 0.8h, temperature of reaction; Second step is prepared biofuel with the pretreated product of base catalysis, its condition be alcohol oil quality than 0.3, catalyst levels 1.0%, reaction times 1h, 70 ℃ of temperature of reaction.Now, the yield of biofuel is 93.78%.
Claims (2)
1. utilize biodiesel to prepare a method for biofuel, it includes:
A, pre-treatment: by stock oil heating, dewater to emitting without bubble; Cooling oil product, the residue with in cotton gauze filter oil, carries out the pre-esterification of methyl alcohol;
B, transesterification reaction: by a certain percentage oil, methyl alcohol and catalyzer after filtering are added in the there-necked flask that is connected to prolong, be heated to preset temperature, while reacting one section, ask, after liquid cooling, move in separating funnel stratification;
Discharge lower floor liquid, supernatant liquid is coarse biodiesel;
C, refining: add sour catalyst neutralisation in coarse biodiesel, repeatedly clean with distilled water, then heating dewaters;
Finally coarse biodiesel is carried out to underpressure distillation, the yellow transparent oil product obtaining is refining biodiesel.
2. according to a kind of method of utilizing biodiesel to prepare biofuel claimed in claim 1, it is characterized in that: described transesterification reaction is divided into 2 footworks: the dense H of the first step
2sO
4make catalyzer raw material is carried out to pre-treatment, its condition is that alcohol oil quality is than 0.2-0.6, catalyst levels 1-2%, reaction times 0.5-1h, temperature of reaction 60-70 ℃; Second step is prepared biofuel with the pretreated product of base catalysis, its condition be alcohol oil quality than 0.2-0.3, catalyst levels 0.5-1.0%, reaction times 0.5-1h, temperature of reaction 60-70 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210268301.3A CN103571637A (en) | 2012-07-31 | 2012-07-31 | Method for preparing biodiesel from waste cooking oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210268301.3A CN103571637A (en) | 2012-07-31 | 2012-07-31 | Method for preparing biodiesel from waste cooking oil |
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| CN103571637A true CN103571637A (en) | 2014-02-12 |
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| CN201210268301.3A Pending CN103571637A (en) | 2012-07-31 | 2012-07-31 | Method for preparing biodiesel from waste cooking oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811308A (en) * | 2016-12-23 | 2017-06-09 | 惠州市鑫隆环保科技有限公司 | A kind of preparation method of industrial fuel oil |
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2012
- 2012-07-31 CN CN201210268301.3A patent/CN103571637A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811308A (en) * | 2016-12-23 | 2017-06-09 | 惠州市鑫隆环保科技有限公司 | A kind of preparation method of industrial fuel oil |
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Application publication date: 20140212 |