CN107794118A - The method for reducing bio-fuel acid number - Google Patents
The method for reducing bio-fuel acid number Download PDFInfo
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- CN107794118A CN107794118A CN201711220607.0A CN201711220607A CN107794118A CN 107794118 A CN107794118 A CN 107794118A CN 201711220607 A CN201711220607 A CN 201711220607A CN 107794118 A CN107794118 A CN 107794118A
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- acid number
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- methyl ester
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/001—Refining fats or fatty oils by a combination of two or more of the means hereafter
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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
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- General Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Liquid Carbonaceous Fuels (AREA)
Abstract
The invention belongs to bio-fuel preparing technical field, the method for more particularly to reducing bio-fuel acid number, including following preparation process：1) to the crude fatty acid methyl ester that acid number is 1 5mgKOH/g, 0.3 1.5% diethylene glycol of addition crude fatty acid methyl ester weight, 0.1 0.5% dimethyl acetamide and 0.8 1.2% isopropanolamine, under 36 48MPa, the 10min of HIGH PRESSURE TREATMENT 5；2) place into homogenizer, stir 20 40min, after standing 1.5 3h, take upper liquid；3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 60 80 ten thousand, collects first time permeate, first time permeate is then crossed into the hollow-fibre membrane that molecular cut off is 130 150 ten thousand, collects second of permeate, is centrifuged, filtering, you can.The inventive method can significantly reduce the acid number of bio-fuel, and in 1 year, acid number will not change too big.
Description
Technical field
The invention belongs to bio-fuel preparing technical field, the method for more particularly to reducing bio-fuel acid number.
Background technology
The day used with world energy sources is becoming tight, find can substitute fossil energy various new energy turn into work as this life
One of important research task of various countries of boundary.And biodiesel is because it is in power performance, environmental-protecting performance and security performance etc.
With great advantage, receive much concern in recent years, obtained faster development.The active ingredient of biodiesel is mainly aliphatic acid
Ester, it is different according to the material reacted from grease selected when producing, it is divided into fatty acid methyl ester, fatty-acid ethyl ester, and it is more after reacting
Remaining grease is doped in the active ingredient of biodiesel, and these greases are mostly waste grease, and its quality is difficult to control, and causes to produce
Product acid number is higher, does not meet BD100 standards.
On the problem of reducing acid number of biodiesel, typically using adding in the alkali lye such as NaOH, KOH and aliphatic acid drops
Low acid number, and alkali lye and aliphatic acid, fatty acid ester can all react generation it is saponified containing sodium, potassium etc., this is saponified in the later stage
Washing refining step in emulsify serious, therefore the addition of alkali lye is restricted, and causes acid number of biodiesel to be still difficult to reach
To requiring, and technique is long, equipment investment is big, seriously polluted, production cost is high.
The content of the invention
The technical problems to be solved by the invention are to provide the method for reducing bio-fuel acid number, can significantly reduce biology
The acid number of fuel, and in 1 year, acid number will not change too big.
To achieve the above object, the present invention adopts the following technical scheme that：
The present invention provides the method for reducing bio-fuel acid number, including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 1-5mgKOH/g, add the 0.3-1.5%'s of crude fatty acid methyl ester weight
Diethylene glycol, 0.1-0.5% dimethyl acetamide and 0.8-1.2% isopropanolamines, under 36-48MPa, HIGH PRESSURE TREATMENT 5-
10min；
2) place into homogenizer, stir 20-40min, after standing 1.5-3h, take upper liquid；
3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 60-80 ten thousand, collects first time permeate, then by the
Permeate crosses the hollow-fibre membrane that molecular cut off is 130-150 ten thousand, collects second of permeate, centrifuges, filtering, i.e.,
Can.
Preferably, in step 1) of the present invention, 0.9% diethylene glycol of addition crude fatty acid methyl ester weight, 0.3%
Dimethyl acetamide and 1.0% isopropanolamine.
Preferably, in step 1) of the present invention, temperature during HIGH PRESSURE TREATMENT is 55-65 DEG C.
Preferably, in step 2) of the present invention, temperature during stirring is 40-50 DEG C.
Preferably, in step 3) of the present invention, 8-16min is centrifuged under 5500-6500r/min rotating speeds.
Compared with the prior art, the beneficial effects of the present invention are：
1st, the present invention is neutralized when reducing acid number without using alkali lye such as NaOH, KOH, is reduced acid number, is effectively avoided
Alkali lye and aliphatic acid, fatty acid ester can all react generation and be refined containing the saponified of sodium, potassium etc., the saponified washing in the later stage
The problem of serious is emulsified in process.
2nd, method technique of the invention is simple, easily operated, and deacidification rate is high, and can ensure in 1 year, and acid number will not become
Change is too big, effectively solves high acid value biodiesel to the etching problem using equipment.
Embodiment
The invention will be further described with reference to embodiments, but the invention is not limited in these embodiments.
Embodiment 1
The method for reducing bio-fuel acid number, including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 1mgKOH/g, 1.5% diethyl two of addition crude fatty acid methyl ester weight
Alcohol, 0.1% dimethyl acetamide and 1.2% isopropanolamine, at 36MPa and 65 DEG C, HIGH PRESSURE TREATMENT 5min；
2) place into homogenizer, at 40 DEG C, stir 40min, after standing 1.5h, take upper liquid；
3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 800,000, first time permeate is collected, then by first
Secondary permeate cross molecular cut off be 1,300,000 hollow-fibre membrane, collect second of permeate, under 6500r/min rotating speeds from
The heart separates 8min, filtering, you can.Tested through analysis, obtained bio-fuel acid number is 0.08mgKOH/g, and acid number is after 1 year
0.12mgKOH/g。
Embodiment 2
The method for reducing bio-fuel acid number, including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 3mgKOH/g, 0.9% diethyl two of addition crude fatty acid methyl ester weight
Alcohol, 0.3% dimethyl acetamide and 1.0% isopropanolamine, at 42MPa and 60 DEG C, HIGH PRESSURE TREATMENT 8min；
2) place into homogenizer, at 45 DEG C, stir 30min, after standing 2.5h, take upper liquid；
3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 700,000, first time permeate is collected, then by first
Secondary permeate cross molecular cut off be 1,400,000 hollow-fibre membrane, collect second of permeate, under 6000r/min rotating speeds from
The heart separates 12min, filtering, you can.Tested through analysis, obtained bio-fuel acid number is 0.15mgKOH/g, and acid number is after 1 year
0.21mgKOH/g。
Embodiment 3
The method for reducing bio-fuel acid number, including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 5mgKOH/g, 0.3% diethyl two of addition crude fatty acid methyl ester weight
Alcohol, 0.5% dimethyl acetamide and 0.8% isopropanolamine, at 48MPa and 55 DEG C, HIGH PRESSURE TREATMENT 10min；
2) place into homogenizer, at 50 DEG C, stir 20min, after standing 3h, take upper liquid；
3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 600,000, first time permeate is collected, then by first
Secondary permeate cross molecular cut off be 1,500,000 hollow-fibre membrane, collect second of permeate, under 5500r/min rotating speeds from
The heart separates 16min, filtering, you can.Tested through analysis, obtained bio-fuel acid number is 0.36mgKOH/g, and acid number is after 1 year
0.48mgKOH/g
Comparative example 1
The preparation method of bio-fuel, including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 3mgKOH/g, the dimethyl second of addition crude fatty acid methyl ester weight 0.3%
Acid amides and 1.0% isopropanolamine, at 42MPa and 60 DEG C, HIGH PRESSURE TREATMENT 8min；
2) place into homogenizer, at 45 DEG C, stir 30min, after standing 2.5h, take upper liquid；
3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 700,000, first time permeate is collected, then by first
Secondary permeate cross molecular cut off be 1,400,000 hollow-fibre membrane, collect second of permeate, under 6000r/min rotating speeds from
The heart separates 12min, filtering, you can.Tested through analysis, obtained bio-fuel acid number is 2.8mgKOH/g, and acid number is after 1 year
7.2mgKOH/g。
Comparative example 2
The preparation method of bio-fuel, including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 3mgKOH/g, 0.9% diethyl two of addition crude fatty acid methyl ester weight
Alcohol and 1.0% isopropanolamine, at 42MPa and 60 DEG C, HIGH PRESSURE TREATMENT 8min；
2) place into homogenizer, at 45 DEG C, stir 30min, after standing 2.5h, take upper liquid；
3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 700,000, first time permeate is collected, then by first
Secondary permeate cross molecular cut off be 1,400,000 hollow-fibre membrane, collect second of permeate, under 6000r/min rotating speeds from
The heart separates 12min, filtering, you can.Tested through analysis, obtained bio-fuel acid number is 2.5mgKOH/g, and acid number is after 1 year
7.6mgKOH/g。
Comparative example 3
The preparation method of bio-fuel, including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 3mgKOH/g, 0.9% diethyl two of addition crude fatty acid methyl ester weight
Alcohol, 0.3% dimethyl acetamide, at 42MPa and 60 DEG C, HIGH PRESSURE TREATMENT 8min；
2) place into homogenizer, at 45 DEG C, stir 30min, after standing 2.5h, take upper liquid；
3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 700,000, first time permeate is collected, then by first
Secondary permeate cross molecular cut off be 1,400,000 hollow-fibre membrane, collect second of permeate, under 6000r/min rotating speeds from
The heart separates 12min, filtering, you can.Tested through analysis, obtained bio-fuel acid number is 2.1mgKOH/g, and acid number is after 1 year
6.8mgKOH/g。
Comparative example 4
The preparation method of bio-fuel, including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 3mgKOH/g, 0.9% diethyl two of addition crude fatty acid methyl ester weight
Alcohol, 0.3% dimethyl acetamide and 1.0% isopropanolamine, at 60 DEG C, stir 8min；
2) place into homogenizer, at 45 DEG C, stir 30min, after standing 2.5h, take upper liquid；
3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 700,000, first time permeate is collected, then by first
Secondary permeate cross molecular cut off be 1,400,000 hollow-fibre membrane, collect second of permeate, under 6000r/min rotating speeds from
The heart separates 12min, filtering, you can.Tested through analysis, obtained bio-fuel acid number is 2.3mgKOH/g, and acid number is after 1 year
7.4mgKOH/g。
Comparative example 5
The preparation method of bio-fuel, including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 3mgKOH/g, 0.9% diethyl two of addition crude fatty acid methyl ester weight
Alcohol, 0.3% dimethyl acetamide and 1.0% isopropanolamine, at 42MPa and 60 DEG C, HIGH PRESSURE TREATMENT 8min；
2) place into homogenizer, at 45 DEG C, stir 30min, after standing 2.5h, take upper liquid；
3) 12min is centrifuged under 6000r/min rotating speeds, is filtered, you can.Tested through analysis, obtained bio-fuel
Acid number is 1.8mgKOH/g, and acid number is 8.3mgKOH/g after 1 year.
Claims (5)
1. reduce the method for bio-fuel acid number, it is characterised in that including following preparation process：
1) to the crude fatty acid methyl ester that acid number is 1-5mgKOH/g, the 0.3-1.5% of addition crude fatty acid methyl ester weight diethyl
Glycol, 0.1-0.5% dimethyl acetamide and 0.8-1.2% isopropanolamines, under 36-48MPa, HIGH PRESSURE TREATMENT 5-10min；
2) place into homogenizer, stir 20-40min, after standing 1.5-3h, take upper liquid；
3) upper liquid is crossed into the hollow-fibre membrane that molecular cut off is 60-80 ten thousand, collects first time permeate, then will for the first time
Permeate crosses the hollow-fibre membrane that molecular cut off is 130-150 ten thousand, collects second of permeate, centrifuges, filtering, you can.
2. the method according to claim 1 for reducing bio-fuel acid number, it is characterised in that：In the step 1), add
0.9% diethylene glycol of crude fatty acid methyl ester weight, 0.3% dimethyl acetamide and 1.0% isopropanolamine.
3. the method according to claim 1 for reducing bio-fuel acid number, it is characterised in that：In the step 1), high pressure
Temperature during processing is 55-65 DEG C.
4. the method according to claim 1 for reducing bio-fuel acid number, it is characterised in that：In the step 2), stirring
When temperature be 40-50 DEG C.
5. the method according to claim 1 for reducing bio-fuel acid number, it is characterised in that：In the step 3),
8-16min is centrifuged under 5500-6500r/min rotating speeds.
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| CN201711220607.0A CN107794118A (en) | 2017-11-29 | 2017-11-29 | The method for reducing bio-fuel acid number |
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| CN201711220607.0A CN107794118A (en) | 2017-11-29 | 2017-11-29 | The method for reducing bio-fuel acid number |
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Citations (6)
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| CN101544928A (en) * | 2008-03-27 | 2009-09-30 | 中国石油化工股份有限公司 | Method for reducing acid value of bio-oil materials |
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| CN101993776A (en) * | 2009-08-27 | 2011-03-30 | 中国石油化工股份有限公司 | Method for deacidifying biodiesel |
| WO2015053609A1 (en) * | 2013-10-08 | 2015-04-16 | Sime Darby Malaysia Berhad | A membrane pre-treatment system and process for producing refined oils and fats |
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2017
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101535451A (en) * | 2006-07-11 | 2009-09-16 | 英诺斯派克燃料专业有限责任公司 | Stabilizer compositions for blends of petroleum and renewable fuels |
| CN101544928A (en) * | 2008-03-27 | 2009-09-30 | 中国石油化工股份有限公司 | Method for reducing acid value of bio-oil materials |
| CN101760225A (en) * | 2008-12-25 | 2010-06-30 | 中国石油化工股份有限公司 | Method for reduction of acid value of biodiesel |
| CN101519601A (en) * | 2009-03-31 | 2009-09-02 | 中国石油化工集团公司 | Method for lowering acid values of crude oil and distillate oil |
| CN101993776A (en) * | 2009-08-27 | 2011-03-30 | 中国石油化工股份有限公司 | Method for deacidifying biodiesel |
| WO2015053609A1 (en) * | 2013-10-08 | 2015-04-16 | Sime Darby Malaysia Berhad | A membrane pre-treatment system and process for producing refined oils and fats |
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Application publication date: 20180313 |