CN111187662B - Process for extracting residual oil from oil tea cakes - Google Patents
Process for extracting residual oil from oil tea cakes Download PDFInfo
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- CN111187662B CN111187662B CN202010065618.1A CN202010065618A CN111187662B CN 111187662 B CN111187662 B CN 111187662B CN 202010065618 A CN202010065618 A CN 202010065618A CN 111187662 B CN111187662 B CN 111187662B
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- 241001122767 Theaceae Species 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000008569 process Effects 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000839 emulsion Substances 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 239000011259 mixed solution Substances 0.000 claims abstract description 17
- 238000010298 pulverizing process Methods 0.000 claims abstract description 9
- 238000007873 sieving Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 239000004927 clay Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 101
- 238000000605 extraction Methods 0.000 abstract description 24
- 239000010495 camellia oil Substances 0.000 abstract description 21
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002904 solvent Substances 0.000 abstract description 6
- 239000003960 organic solvent Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 235000019198 oils Nutrition 0.000 description 92
- 239000007788 liquid Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 240000001548 Camellia japonica Species 0.000 description 6
- 235000018597 common camellia Nutrition 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- RYYVLZVUVIJVGH-UHFFFAOYSA-N caffeine Chemical compound CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000005686 electrostatic field Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000019476 oil-water mixture Nutrition 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000000194 supercritical-fluid extraction Methods 0.000 description 2
- 238000009210 therapy by ultrasound Methods 0.000 description 2
- 238000003809 water extraction Methods 0.000 description 2
- 241000526900 Camellia oleifera Species 0.000 description 1
- 244000147058 Derris elliptica Species 0.000 description 1
- LPHGQDQBBGAPDZ-UHFFFAOYSA-N Isocaffeine Natural products CN1C(=O)N(C)C(=O)C2=C1N(C)C=N2 LPHGQDQBBGAPDZ-UHFFFAOYSA-N 0.000 description 1
- 238000000944 Soxhlet extraction Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960001948 caffeine Drugs 0.000 description 1
- VJEONQKOZGKCAK-UHFFFAOYSA-N caffeine Natural products CN1C(=O)N(C)C(=O)C2=C1C=CN2C VJEONQKOZGKCAK-UHFFFAOYSA-N 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000001397 quillaja saponaria molina bark Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229930182490 saponin Natural products 0.000 description 1
- 150000007949 saponins Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Extraction Or Liquid Replacement (AREA)
- Fats And Perfumes (AREA)
- Tea And Coffee (AREA)
Abstract
The invention belongs to the technical field of tea oil extraction, and particularly relates to a process for extracting residual oil from tea oil cakes. The process comprises pulverizing oil tea cake, sieving, adding water, and preparing into mixed solution; carrying out ultrasonic stirring on the mixed solution obtained in the step (1), and filtering to obtain emulsion; and demulsifying and centrifugally separating the emulsion to obtain the oil product. The method can further extract the tea oil cake with low oil content by matching ultrasonic stirring and demulsification, the extraction rate of residual oil in the tea oil cake is 75-80%, and compared with the traditional method, the extraction rate of residual oil is improved by 5-10%, and the method has the advantages of short extraction time, high extraction efficiency and low energy consumption. The invention uses water as solvent, so that the extracted oil product does not contain organic solvent, solves the problem of poor quality of the oil product caused by using hexane as solvent in the prior art, and simultaneously avoids the problems of environmental pollution and the like caused by separating hexane from the oil product in the later period.
Description
Technical Field
The invention belongs to the technical field of tea oil extraction, and particularly relates to a process for extracting residual oil from tea oil cakes.
Background
The oil tea is an important woody oil tree species in the south of China, and is one of four woody oil source tree species in the world. In 2009, the planting area of the tea-oil camellia in China is about 4500 mu, the yield of tea-oil camellia seeds is about 100 ten thousand tons/year, and the annual yield of tea-oil camellia is 26 ten thousand tons. The oil tea cake is residue left after oil extraction of oil tea, contains protein, oil, tea saponin, crude fiber, saccharide, tannin, caffeine, etc., and contains residual oil 5-10% by squeezing method. The oil tea cake in China has high yield which is about 3 times of the tea oil yield, and the tea cake is bitter and toxic and can not be directly used as feed, so that most of the oil tea cake is burnt as fuel at present, and a part of the oil tea cake is used as fertilizer or discarded, thereby causing resource waste.
Currently, extraction methods for residuum include water extraction, organic solvent extraction, supercritical extraction, and the like. The extraction efficiency of the water extraction method is low, the tea oil extracted by the organic solvent extraction method contains solvent, so that the quality of the tea oil is reduced, and the separation of the solvent and the tea oil is difficult. The supercritical extraction method requires high temperature and high pressure, is harsh in extraction and is not suitable for large-scale production.
The Chinese literature 'process for extracting tea oil from camellia seeds by water substitution method' discloses a process for extracting tea oil from camellia seeds by water substitution method, wherein the extraction method comprises the steps of weighing peeled and dried camellia seed kernels, grinding, adding a certain proportion of water, oscillating and extracting for a certain time in a constant-temperature water bath under different conditions, centrifuging for 10min at 4000r/min after extraction, sucking upper clear oil, and weighing; the emulsified layer and the water layer are sucked off again to obtain slurry residue, and the residual oil rate is measured after drying for 12 hours at 55 ℃, wherein the residual oil content is 6.9-11.8% and the residual oil content cannot be further reduced in the tea seed kernels containing a large amount of tea oil. At present, no method for extracting oil tea cakes with low oil content is available.
Disclosure of Invention
Therefore, the invention aims to overcome the defects of the prior art that the method for extracting the oil tea cake with low oil content is not available, the extracted oil quality is poor and the like, thereby providing a process for extracting residual oil from the oil tea cake.
For this purpose, the invention provides the following technical scheme.
The invention provides a process for extracting residual oil from oil tea cakes, which comprises the following steps,
(1) Pulverizing and sieving the oil tea cake, adding water, and preparing into mixed solution for later use;
(2) Carrying out ultrasonic stirring on the mixed solution obtained in the step (1), and filtering to obtain emulsion;
(3) And demulsifying and centrifugally separating the emulsion to obtain the oil product.
And (2) performing ultrasonic treatment at the temperature of 40-80 ℃, the frequency of 0.5-2MHz and the time of 10-30min.
And (2) stirring at a rotating speed of 60-100rpm.
And (3) the demulsification method is alternating current demulsification.
The voltage of the alternating current is 200-2000V, and the frequency is 900-1100Hz;
the alternating current is discharged by adopting two insulated electrodes, and the distance between the insulated electrodes is 10-20mm.
And (3) demulsification is carried out for 15-30min.
The particle size after sieving in the step (1) is 0.3-0.6mm;
the mass fraction of the medium oil tea cake of the mixed solution is 10-30%.
The process for extracting the residual oil from the oil tea cake further comprises the treatment step of deacidifying and decoloring the oil obtained after centrifugal separation to obtain the finished oil.
Further, deacidifying and decoloring the oil obtained after centrifugal separation by using activated clay.
The insulating electrode is made of at least one of glass, plastic and quartz.
The technical scheme of the invention has the following advantages:
1. the invention provides a process for extracting residual oil from oil tea cakes, which comprises the steps of crushing the oil tea cakes, sieving, adding water and preparing a mixed solution for later use; carrying out ultrasonic stirring on the mixed solution obtained in the step (1), and filtering to obtain emulsion; and demulsifying and centrifugally separating the emulsion to obtain the oil product. The method can further extract the tea oil cake with low oil content by matching ultrasonic stirring and demulsification, the extraction rate of residual oil in the tea oil cake is 75-80%, and compared with the traditional method, the extraction rate of residual oil is improved by 5-10%, and the method has the advantages of short extraction time, high extraction efficiency and low energy consumption. The invention uses water as solvent, so that the extracted oil product does not contain organic solvent, solves the problem of poor quality of the oil product caused by using hexane as solvent in the prior art, and simultaneously avoids the problems of environmental pollution and the like caused by separating hexane from the oil product in the later period.
The process for extracting residual oil provided by the invention has the advantages of low cost of raw materials, high quality of the prepared oil product, no refining steps such as degumming and the like, good stability, long-time continuous operation and suitability for large-scale industrial operation.
2. According to the process for extracting residual oil from the oil tea cake, provided by the invention, the residual oil in the oil tea cake can be rapidly separated from other components and enters the water phase by controlling the temperature, frequency and time of ultrasonic waves, so that the extraction time is shortened, and the extraction efficiency is improved. By controlling the stirring rotation speed of ultrasonic waves, the oil tea cakes are placed for sedimentation and aggregation, so that the extraction efficiency of residual oil is improved.
3. According to the process for extracting residual oil from the oil tea cake, provided by the invention, an alternating current demulsification method is adopted, other impurities are not introduced into the oil product, the quality of the oil product is ensured, the added water can be recycled after centrifugal separation, and the resources are saved; and the method for demulsifying by alternating current can shorten the demulsifying time, and can finish demulsifying by controlling the minimum time to 15min, thereby shortening the extraction time.
Under the action of the alternating electrostatic field, the surface charges of the liquid drops are periodically changed due to the fact that the voltage direction is continuously changed, the liquid shape is continuously overturned along with the change of the alternating electrostatic field under the action of the electrostatic force, when the acting force is large enough, the liquid drops are deformed to a certain degree to collide with each other, coalescence behavior is generated, and emulsion breaking is achieved. The voltage of the alternating current is controlled to be 200-2000V, because the voltage is too high, which causes breakdown of an insulated electrode, damages the electrode, and has high energy consumption, while the voltage is too low, which is not beneficial to oil-water separation. The alternating current has the frequency of 900-1100Hz, and the alternating current is suitable for 900-1100Hz because the frequency is too low, the deformation is insufficient to deform the liquid, the frequency is too high, the deformation rate is too high, and the liquid drops can not be gathered.
At least one of glass, plastic or quartz is used as an insulating electrode, so that the stability of an oil-water mixture can be ensured, the electrical performance of the oil-water mixture is not changed with time, and the electric field strength can be higher under the condition of lower voltage, and the cost is low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a process flow diagram of a process for extracting resid from a camellia oleifera cake in example 1 of the present invention;
reference numerals:
1-a pulverizer; 2-a lifting machine; 3-powder selecting machine; 4-a stirrer; 5-an ultrasonic reactor; 6-a filter; 7-decanter; 8-a centrifuge; 9-alternating current demulsifier.
Detailed Description
The following examples are provided for a better understanding of the present invention and are not limited to the preferred embodiments described herein, but are not intended to limit the scope of the invention, any product which is the same or similar to the present invention, whether in light of the present teachings or in combination with other prior art features, falls within the scope of the present invention.
The specific experimental procedures or conditions are not noted in the examples and may be followed by the operations or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagents and products commercially available without the manufacturer's knowledge.
Example 1
The embodiment provides a process for extracting residual oil from oil tea cakes, which comprises the following steps,
the oil tea cake after being washed by distilled water and removing impurities is put into a pulverizer 1 with the rotating speed of 150r/min for pulverizing for 30min, and is sent to a powder selecting machine 3 for sieving by a lifter 2, and the powder is sieved until the particle size is not more than 0.3mm, wherein the filling rate of the oil tea cake in the pulverizer is 15%, and the filling rate of a pulverizing medium is 15%.
Accurately weighing 0.5kg of crushed oil tea cake and 4.5kg of water, and mixing in a stirrer 4 to prepare a mixed solution for later use.
Adding the mixed solution into an ultrasonic reactor 5 with temperature control and stirring for ultrasonic stirring, extracting residual oil, and dispersing the residual oil in the oil tea cake into water under the ultrasonic action; the ultrasonic temperature is 80 ℃, the ultrasonic time is 30min, the frequency is 2MHz, and the stirring speed is 100rpm; the sonicated mixture was then passed through filter 6 to filter off residual solids, yielding 4.3kg of emulsion.
Feeding the emulsion into an alternating current demulsifier 9, demulsifying the emulsion under the conditions of 1000V, 900Hz frequency and 10mm distance between insulated electrodes for 15min, and then feeding the emulsion into a decanter 7 for standing for 30min to separate the solution; and then placing the upper liquid into a centrifugal machine 8 with the rotation speed of 5000rpm, and centrifuging for 10min to obtain the oil product.
Deacidifying and decoloring the oil product by using activated clay to obtain the finished product oil.
The measurement shows that the extraction rate of residual oil in the tea oil cake is 80%; wherein the extraction rate is obtained by a formula I; the mass content of residual oil in the oil tea cake is obtained by analysis of Soxhlet extraction method.
Example 2
The embodiment provides a process for extracting residual oil from oil tea cakes, which comprises the following steps,
the oil tea cake after being washed by distilled water and removing impurities is put into a pulverizer 1 with the rotating speed of 200r/min for pulverizing for 40min, and is sent to a powder selecting machine 3 for sieving by a lifter 2, and the powder is sieved until the particle size is not more than 5mm, wherein the filling rate of the oil tea cake in the pulverizer is 20 percent, and the filling rate of a pulverizing medium is 18 percent.
Accurately weighing 1kg of crushed oil tea cake and 4kg of water, and mixing in a stirrer 4 to prepare a mixed solution for later use.
Adding the mixed solution into an ultrasonic reactor 5 with temperature control and stirring for ultrasonic stirring, extracting residual oil, and dispersing the residual oil in the oil tea cake into water under the ultrasonic action; the ultrasonic temperature is 60 ℃, the ultrasonic time is 20min, the frequency is 1MHz, and the stirring speed is 60rpm; the sonicated mixture was then passed through filter 6 to filter off residual solids, yielding 3.6kg of emulsion.
Feeding the emulsion into an alternating current demulsifier 9, demulsifying the emulsion under the conditions of 1500V voltage, 1000Hz frequency and 10mm distance between insulated electrodes for 18min, and then feeding into a decanter 7 for standing for 30min to separate the solution; and then placing the upper liquid into a centrifugal machine 8 with the rotation speed of 5000rpm, and centrifuging for 10min to obtain the oil product.
Deacidifying and decoloring the oil product by using activated clay to obtain the finished product oil.
The extraction rate of residual oil in the tea oil cake is 78 percent according to the measurement.
Example 3
The embodiment provides a process for extracting residual oil from oil tea cakes, which comprises the following steps,
the oil tea cake after being washed by distilled water and removing impurities is put into a pulverizer 1 with the rotating speed of 160r/min for pulverizing for 40min, and is sent to a powder selecting machine 3 for sieving by a lifter 2, and the powder is sieved until the particle size is not more than 6mm, wherein the filling rate of the oil tea cake in the pulverizer is 16% and the filling rate of a pulverizing medium is 23%.
Accurately weighing 1.5kg of crushed oil tea cake and 3.5kg of water, and mixing in a stirrer 4 to prepare a mixed solution for later use.
Adding the mixed solution into an ultrasonic reactor 5 with temperature control and stirring for ultrasonic stirring, extracting residual oil, and dispersing the residual oil in the oil tea cake into water under the ultrasonic action; the ultrasonic temperature is 50 ℃, the ultrasonic time is 30min, the frequency is 0.4MHz, and the stirring speed is 80rpm; then, the mixed solution after ultrasonic treatment was introduced into a plate-and-frame filter press, and the residual solids were filtered off to obtain 3.0kg of an emulsion.
Feeding the emulsion into an alternating current demulsifier 9, demulsifying the emulsion under the conditions of 500V voltage, 1100Hz frequency and 18mm distance between insulated electrodes for 16min, and then feeding the emulsion into a decanter 7 for standing for 30min to separate the solution; and then placing the upper liquid into a centrifugal machine 8 with the rotation speed of 5000rpm, and centrifuging for 10min to obtain the oil product.
The extraction rate of residual oil in the tea oil cake is 75 percent according to the measurement.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (1)
1. A process for extracting residual oil from oil tea cakes is characterized by comprising the following steps,
(1) Pulverizing and sieving the oil tea cake, adding water, and preparing into mixed solution for later use;
(2) Carrying out ultrasonic stirring on the mixed solution obtained in the step (1), and filtering to obtain emulsion;
(3) Demulsification and centrifugal separation are carried out on the emulsion to obtain oil products;
the demulsification method is alternating current demulsification;
the temperature of the ultrasonic wave is 40-80 ℃, the frequency is 0.5-2MHz, the time is 10-30min, and the stirring rotating speed is 60-100rpm;
the voltage of the alternating current is 200-2000V, and the frequency is 900-1100Hz;
the alternating current is discharged by adopting two insulated electrodes, and the distance between the insulated electrodes is 10-20mm;
the demulsification time is 15-30min;
the insulating electrode is made of at least one of glass, plastic and quartz;
the particle size after sieving in the step (1) is 0.3-0.6mm;
the mass fraction of the medium-oil tea cake of the mixed solution is 10-30%;
and the treatment step of deacidifying and decoloring the oil obtained after centrifugal separation by using activated clay to obtain finished oil.
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| CN114703015A (en) * | 2021-12-30 | 2022-07-05 | 安徽盛晨食品有限公司 | Production method of selenium-rich camellia seed oil |
| CN115010572A (en) * | 2022-07-07 | 2022-09-06 | 广州美林生态科技有限公司 | Method for extracting squalene and vitamin E |
Citations (3)
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| CN101235398A (en) * | 2008-03-05 | 2008-08-06 | 中国林业科学研究院亚热带林业研究所 | Technique for extracting residual oil from oil-tea camellia pomace by enzyme method |
| CN102965183A (en) * | 2012-12-07 | 2013-03-13 | 东北农业大学 | Method for extracting peanut grease by adopting aqueous enzymatic method through demulsification |
| CN103205310A (en) * | 2013-05-08 | 2013-07-17 | 长沙理工大学 | Method for sequentially extracting tea saponin and tea seed oil from oil-tea camellia seeds |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101235398A (en) * | 2008-03-05 | 2008-08-06 | 中国林业科学研究院亚热带林业研究所 | Technique for extracting residual oil from oil-tea camellia pomace by enzyme method |
| CN102965183A (en) * | 2012-12-07 | 2013-03-13 | 东北农业大学 | Method for extracting peanut grease by adopting aqueous enzymatic method through demulsification |
| CN103205310A (en) * | 2013-05-08 | 2013-07-17 | 长沙理工大学 | Method for sequentially extracting tea saponin and tea seed oil from oil-tea camellia seeds |
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| Title |
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| 高压/高频脉冲交流电场中W/O型乳化液的静电聚结特性研究;丁艺等;《高校化学工程学报》;20111015(第05期);第775-780页 * |
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