CN107674758A - The method for extracting coffee grease from coffee grounds using ultrasonic subcritical fluid extraction technology - Google Patents
The method for extracting coffee grease from coffee grounds using ultrasonic subcritical fluid extraction technology Download PDFInfo
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- CN107674758A CN107674758A CN201711171948.3A CN201711171948A CN107674758A CN 107674758 A CN107674758 A CN 107674758A CN 201711171948 A CN201711171948 A CN 201711171948A CN 107674758 A CN107674758 A CN 107674758A
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- China
- Prior art keywords
- coffee
- grease
- coffee grounds
- ultrasonic
- extraction
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Classifications
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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
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/10—Production of fats or fatty oils from raw materials by extracting
- C11B1/106—Production of fats or fatty oils from raw materials by extracting using ultra-sounds
-
- 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
Abstract
The invention discloses a kind of method for extracting coffee grease from coffee grounds using ultrasonic subcritical fluid extraction technology, is by 1 after coffee grounds is dried with extractant:1~1:The 3kg/L molten ratio of material, in 20 DEG C ~ 60 DEG C of extraction temperature, 0.2 MPa of extracting pressure ~ 0.6Mpa, supersonic frequency is 15KHz ~ 30KHz, and the subcritical combined extraction 30min ~ 60min of ultrasound is carried out under the conditions of lucifuge；Extractant is extracted in extraction out after terminating, extractant is residual molten through thin film evaporator removal again after precipitation, produces coffee grease.The present invention is made the active component of coffee grounds effectively completely extract, is significantly improved the yield of coffee oil and fat product using the subcritical combined extraction of ultrasound；Active component in the coffee grounds for being simultaneously is not destroyed；Solvent is recyclable, reduces solvent loss, cost-effective, product no solvent residue, is adapted to scale industrial production actual demand.
Description
Technical field
The present invention relates to a kind of extracting method of coffee grease, more particularly to one kind to utilize ultrasonic subcritical fluid extraction skill
The method that art extracts coffee grease from coffee grounds, belongs to coffee field of deep.
Background technology
Coffee and cocoa, tea are known as three big beverage of the world, coffee be Rubiaceae Coffea perennial evergreen shrub or
Dungarunga, the African central and north is originated in, planted extensively in the torrid zones such as Asia, Africa, Latin America, Oceania, subtropical zone
Area.Caffeol is a kind of valuable natural perfume material oil, and coffee can be prepared as the odorant or fumet of food through dilution
Perfume and functional film and textile of coffee odor type etc..Coffee grounds is to process the accessory substance left during instant coffee, and its is heavy
Amount accounts for the 2/3 of the dry beans of coffee, i.e., often producing 1 ton of instant coffee can discharge 2 tons of coffee grounds.Containing more rich in coffee grounds
Grease, carbohydrate and protein etc., wherein coffee oil content are more than 14%, but because it is not soluble in water, therefore most grease remains in
Gone out of use in coffee grounds.
CN105779105A discloses a kind of method based on discarded coffee grounds extraction biodiesel, is by normal heptane solvent
Add extraction in coffee grounds and obtain caffeol, then by caffeol warm water, heating, add alkali lye, separate fuel-displaced and soap stock, then
Washing sedimentation, separates drying；Excessive methanol most is added in refining caffeol backward, under NaOH catalytic action, grease and first
Alcohol carries out ester exchange reaction at ambient pressure, air-distillation, reclaims excessive methanol, and catalyst is recovered by filtration, and filtrate is put into pyriform
Stratification in separatory funnel, upper strata are biodiesel.CN105925364A discloses one kind and utilizes ultrasonic wave from coffee grounds
The method of middle extraction caffeol, it is by be well mixed to obtain mixing stoste after coffee grounds is dried with organic solvent, then will mixes
Stoste carries out ultrasonication and obtains the mixed solution of caffeol and organic solvent, then by the mixing of caffeol and organic solvent
Solution is filtered or filtered, and is reclaimed organic solvent after filtrate is distilled, is obtained caffeol.The organic solvent bag that this method uses
Chloroform, acetone, ether, ethyl acetate, petroleum ether and ethanol are included, and product is residual molten, and dissolvent residual causes caffeol without removing
Product Safety is poor.CN104804874A is related to the method for supercritical carbon dioxide extracting caffeol, is using coffee bean as raw material
Supercritical carbon dioxide extracting is carried out, this method production cost is high.But both at home and abroad there is not yet using subcritical abstraction technology system
The report of standby caffeol.
The content of the invention
The present invention provides a kind of method for extracting coffee grease from coffee grounds using ultrasonic subcritical fluid extraction technology.
The method that the present invention extracts coffee grease from coffee grounds, is by 1 after coffee grounds is dried with extractant:1~1:
The 3kg/L molten ratio of material, in 20 DEG C ~ 60 DEG C of extraction temperature, 0.2 MPa of extracting pressure ~ 0.6Mpa, supersonic frequency be 15KHz ~
30KHz, the subcritical combined extraction 30min ~ 60min of ultrasound is carried out under the conditions of lucifuge；Extraction extracts extractant out after terminating, and extracts
Solvent is residual molten through thin film evaporator removal again after precipitation, produces coffee grease.The yield of coffee grease is more than 20%.
The accessory substance that the coffee grounds remains when being processing instant coffee；The drying of coffee grounds is dried at 40 DEG C ~ 60 DEG C
It is dry 2 ~ 10 hours.
The extractant uses LPG, butane, iso-butane or dimethyl ether.
The combined extraction is continuous extraction, and extraction times are 1 ~ 5 time.
For the temperature control of the extractant precipitation at 10 DEG C ~ 40 DEG C, pressure is -0.01 ~ -0.1MPa.
Described to remove residual molten temperature control at 10 DEG C ~ 50 DEG C using thin film evaporator, pressure is -0.01 ~ -0.1MPa.
The vaporized solvent that extractant evaporation precipitation obtains reclaims after diaphragm type compressor compresses and liquefies.
The present invention has advantages below compared with prior art：
1st, using the subcritical combined extraction of ultrasound, the active component of coffee grounds is effectively completely extracted, significantly improve
The yield of coffee oil and fat product；Active component in the coffee grounds for being simultaneously is not destroyed；
2nd, extracted using normal temperature, low temperature desolventizing, overcoming traditional solvent extraction method needs heating distillation in separation process, destroys
The shortcomings of active material and dissolvent residual of coffee grounds；
3rd, solvent is recyclable, reduces solvent loss, cost-effective, product no solvent residue, is adapted to large-scale industrial
Produce reality demand.
Embodiment
The method for extracting coffee grease to the present invention below by specific embodiment is further described.
Embodiment 1
（1）Dry：Coffee grounds is dried 8 hours at 40 DEG C；
（2）The subcritical combined extraction of ultrasound：The coffee grounds of 25kg dryings is weighed, is positioned over the extractor of subcritical abstraction equipment
In, feeding-passage is closed, by solid-liquid ratio 1:1.5 kg/L inject LPG solvent, are heated to 35 DEG C, extracting pressure is
0.35MPa, supersonic frequency 25KHz, lucifuge extract 5 times, extraction time 40min/ times；
（3）Precipitation and solvent recovery：After the completion of extraction, extraction solution is evacuated in knockout drum.Vavuum pump is opened, by knockout drum
Pressure is down to -0.1MPa, and temperature is maintained at 30 DEG C, and removing extracts the propane in solution, while by the propane of gasification through barrier film pressure
Contracting machine is compressed into liquid, is back in solvent tank, in case recycling；Article in knockout drum after precipitation is that coffee grease is thick
Product；
（4）Except residual molten：Coffee grease crude product is residual molten by thin film evaporator removal, obtains coffee oil and fat product.Thin film evaporator is gone
Except residual molten temperature is 10 DEG C, pressure is -0.1MPa.Obtain coffee grease 4.875kg, yield 19.5%.
Embodiment 2
（1）Dry：Coffee grounds is dried 6 hours at 50 DEG C；
（2）The subcritical combined extraction of ultrasound：The coffee grounds of 25kg dryings is weighed, is positioned over the extractor of subcritical abstraction equipment
In, feeding-passage is closed, by solid-liquid ratio 1:2 kg/L inject diformazan ether solvents, are heated to 40 DEG C, extracting pressure 0.4MPa, surpass
Acoustic frequency is 15KHz, and lucifuge extracts 3 times, extraction time 60min/ times；
（3）Precipitation and solvent recovery：After the completion of extraction, extraction solution is evacuated in knockout drum.Vavuum pump is opened, by knockout drum
Pressure is down to -0.1MPa, and temperature is maintained at 30 DEG C, the dimethyl ether in removing extraction solution, at the same by the dimethyl ether of gasification pass through every
Film compressor is compressed into liquid, is back in solvent tank, in case recycling.Article in knockout drum after precipitation is caffeol
Fat crude product；
（4）Except residual molten：Coffee grease crude product is residual molten by thin film evaporator removal, obtains coffee oil and fat product.Thin film evaporator is gone
Except residual molten temperature is 25 DEG C, pressure is -0.05MPa.Obtain the kg of coffee grease 5.05, yield 20.2%.
Embodiment 3
（1）Dry：Coffee grounds is dried 2 hours at 60 DEG C；
（2）The subcritical combined extraction of ultrasound：The coffee grounds of 25kg dryings is weighed, is positioned over the extractor of subcritical abstraction equipment
In, feeding-passage is closed, by solid-liquid ratio 1:1.3 kg/L inject liquefied butane solvent, are heated to 45 DEG C, extracting pressure is
0.45MPa, supersonic frequency 20KHz, lucifuge extract 4 times, extraction time 50min/ times；
（3）Precipitation and solvent recovery：After the completion of extraction, extraction solution is evacuated in knockout drum.Vavuum pump is opened, by knockout drum
Pressure is down to -0.1MPa, and temperature is maintained at 20 DEG C, and removing extracts the butane in solution, while by the butane of gasification through barrier film pressure
Contracting machine is compressed into liquid, is back in solvent tank, in case recycling.Article in knockout drum after precipitation is that coffee grease is thick
Product；
（4）Except residual molten：Coffee grease crude product is residual molten by thin film evaporator removal, obtains coffee oil and fat product.Thin film evaporator is gone
Except residual molten temperature is 20 DEG C, pressure is -0.05MPa.Obtain the kg of coffee grease 5.35, yield 21.4%.
Claims (8)
1. the method that coffee grease is extracted from coffee grounds using ultrasonic subcritical fluid extraction technology, it is characterised in that：By coffee
After the drying of coffee slag 1 is pressed with extractant:1~1:The 3kg/L molten ratio of material, in 20 DEG C ~ 60 DEG C of extraction temperature, the MPa of extracting pressure 0.2
~ 0.6Mpa, supersonic frequency are 15KHz ~ 30KHz, and the subcritical combined extraction 30min ~ 60min of ultrasound is carried out under the conditions of lucifuge；Extraction
Extractant is extracted out after taking end, and extractant is residual molten through thin film evaporator removal again after precipitation, produces coffee grease.
2. such as the method that claim 1 extracts coffee grease using ultrasonic subcritical fluid extraction technology from coffee grounds, it is special
Sign is：The accessory substance that the coffee grounds remains when being processing instant coffee.
3. such as the method that claim 1 extracts coffee grease using ultrasonic subcritical fluid extraction technology from coffee grounds, it is special
Sign is：The drying of the coffee grounds is dried 2 ~ 10 hours at 40 DEG C ~ 60 DEG C.
4. such as the method that claim 1 extracts coffee grease using ultrasonic subcritical fluid extraction technology from coffee grounds, it is special
Sign is：The extractant is LPG, butane, iso-butane or dimethyl ether.
5. such as the method that claim 1 extracts coffee grease using ultrasonic subcritical fluid extraction technology from coffee grounds, it is special
Sign is：The combined extraction is continuous extraction, and extraction times are 1 ~ 5 time.
6. such as the method that claim 1 extracts coffee grease using ultrasonic subcritical fluid extraction technology from coffee grounds, it is special
Sign is：For the temperature control of the extractant precipitation at 10 DEG C ~ 40 DEG C, pressure is -0.01 ~ -0.1MPa.
7. such as the method that claim 1 extracts coffee grease using ultrasonic subcritical fluid extraction technology from coffee grounds, it is special
Sign is：Residual molten temperature control is removed at 10 DEG C ~ 50 DEG C using thin film evaporator, and pressure is -0.01 ~ -0.1MPa.
8. such as the method that claim 1 extracts coffee grease using ultrasonic subcritical fluid extraction technology from coffee grounds, it is special
Sign is：Vaporized solvent after extractant evaporation precipitation reclaims after diaphragm type compressor compresses and liquefies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711171948.3A CN107674758A (en) | 2017-11-22 | 2017-11-22 | The method for extracting coffee grease from coffee grounds using ultrasonic subcritical fluid extraction technology |
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| CN201711171948.3A CN107674758A (en) | 2017-11-22 | 2017-11-22 | The method for extracting coffee grease from coffee grounds using ultrasonic subcritical fluid extraction technology |
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| CN107674758A true CN107674758A (en) | 2018-02-09 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111019759A (en) * | 2019-12-30 | 2020-04-17 | 云南大学 | Method for extracting coffee extract from coffee grounds |
| CN111214846A (en) * | 2019-11-29 | 2020-06-02 | 云南绿A生物产业园有限公司 | Haematococcus pluvialis extract and preparation method thereof |
| CN111387327A (en) * | 2020-03-30 | 2020-07-10 | 黑龙江八一农垦大学 | Preparation method of green coffee oil |
| CN113144665A (en) * | 2021-01-18 | 2021-07-23 | 三益创价生物科技(深圳)有限公司 | Accurate extraction and purification device and method for grease SPE propane |
| CN114015501A (en) * | 2021-11-23 | 2022-02-08 | 东北农业大学 | Coffee oil pre-extraction technology through plasma treatment |
| CN115138096A (en) * | 2022-07-07 | 2022-10-04 | 广州美林生态科技有限公司 | Method for extracting tea saponin by subcritical ethanol and/or methanol |
| CN115433407A (en) * | 2021-06-04 | 2022-12-06 | 科劲发展有限公司 | Composite plastic containing plant fiber, preparation method and application thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111214846A (en) * | 2019-11-29 | 2020-06-02 | 云南绿A生物产业园有限公司 | Haematococcus pluvialis extract and preparation method thereof |
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| CN111387327A (en) * | 2020-03-30 | 2020-07-10 | 黑龙江八一农垦大学 | Preparation method of green coffee oil |
| CN113144665A (en) * | 2021-01-18 | 2021-07-23 | 三益创价生物科技(深圳)有限公司 | Accurate extraction and purification device and method for grease SPE propane |
| CN115433407A (en) * | 2021-06-04 | 2022-12-06 | 科劲发展有限公司 | Composite plastic containing plant fiber, preparation method and application thereof |
| CN114015501A (en) * | 2021-11-23 | 2022-02-08 | 东北农业大学 | Coffee oil pre-extraction technology through plasma treatment |
| CN115138096A (en) * | 2022-07-07 | 2022-10-04 | 广州美林生态科技有限公司 | Method for extracting tea saponin by subcritical ethanol and/or methanol |
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Application publication date: 20180209 |
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