CN111187662A - Process for extracting residual oil from oil tea cakes - Google Patents
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- CN111187662A CN111187662A CN202010065618.1A CN202010065618A CN111187662A CN 111187662 A CN111187662 A CN 111187662A CN 202010065618 A CN202010065618 A CN 202010065618A CN 111187662 A CN111187662 A CN 111187662A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 241001122767 Theaceae Species 0.000 title claims abstract description 41
- 230000008569 process Effects 0.000 title claims abstract description 27
- 239000000839 emulsion Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 239000011259 mixed solution Substances 0.000 claims abstract description 17
- 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
- 238000002604 ultrasonography Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 92
- 238000000605 extraction Methods 0.000 abstract description 25
- 239000010495 camellia oil Substances 0.000 abstract description 17
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002904 solvent Substances 0.000 abstract description 6
- 238000010298 pulverizing process Methods 0.000 abstract description 5
- 239000003960 organic solvent Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 235000019198 oils Nutrition 0.000 description 83
- 240000001548 Camellia japonica Species 0.000 description 15
- 235000018597 common camellia Nutrition 0.000 description 15
- 239000007788 liquid Substances 0.000 description 14
- 241000526900 Camellia oleifera Species 0.000 description 7
- 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
- 239000000843 powder Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000009210 therapy by ultrasound Methods 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 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
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000019476 oil-water mixture Nutrition 0.000 description 2
- 239000002002 slurry Substances 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
- 238000003809 water extraction Methods 0.000 description 2
- 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
- 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
- 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
- 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
- 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
Images
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
- 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
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- 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)
- Fats And Perfumes (AREA)
- Tea And Coffee (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The invention belongs to the technical field of tea oil extraction, and particularly relates to a process for extracting residual oil from a tea-oil cake. The process comprises pulverizing oil tea cake, sieving, adding water to obtain mixed solution; ultrasonically stirring 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 with demulsification, the extraction rate of the residual oil in the tea oil cake is 75-80%, and compared with the traditional method, the method has the advantages that the extraction rate of the residual oil is improved by 5-10%, the extraction time is short, the extraction efficiency is high, and the energy consumption is low. The method takes water as a solvent, so that the oil product obtained by extraction does not contain an organic solvent, the problem of oil product quality deterioration caused by taking hexane as the solvent in the prior art is solved, and the problems of environmental pollution and the like caused by separating hexane from the oil product in the later period are avoided.
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 a tea-oil cake.
Background
The camellia oleifera is an important woody oil tree species in the south of China and is one of the four woody oil source tree species in the world. By 2009, the planting area of camellia oleifera in China is about 4500 ten thousand mu, the yield of camellia seeds is about 100 ten thousand tons per year, and 26 ten thousand tons of camellia oleifera oil are produced annually. 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 of 5-10%. The oil tea cake in China has high yield which is about 3 times of the oil tea cake, and the oil tea cake is bitter and toxic in taste and cannot be directly used as a feed, so that most of the oil tea cake is burnt as a fuel at present, and one part of the oil tea cake is used as a fertilizer or discarded, thereby causing resource waste.
At present, the extraction method of the residual oil comprises a water extraction method, an organic solvent extraction method, a supercritical extraction method and the like. The extraction efficiency of the water extraction method is not high, the tea oil extracted by the organic solvent extraction method contains a 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 to extract, and is not suitable for large-scale production.
Chinese literature 'Water substitution method for extracting tea oil from camellia seeds' discloses a water substitution method for extracting tea oil from camellia seeds, the extraction method comprises weighing peeled and dried camellia seeds, grinding, adding a certain proportion of water, extracting for a certain time in constant temperature water bath shaking under different conditions, centrifuging at 4000r/min for 10min after extraction, sucking upper clear oil and weighing; and then absorbing an emulsion layer and a water layer to obtain slurry residue, drying the slurry residue at the temperature of 55 ℃ for 12 hours, and measuring the residual oil rate, wherein the reference is to extract tea seed kernels containing a large amount of tea oil, the residual oil content is 6.9-11.8%, and the residual oil content cannot be further reduced. At present, no method for extracting oil-tea camellia cakes with low oil content exists.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that no method for extracting the oil-tea camellia cake with low oil content exists, the quality of the extracted oil product is poor and the like in the prior art, so that the process for extracting the residual oil from the oil-tea camellia cake is provided.
Therefore, 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) crushing and sieving the oil tea cakes, and adding water to prepare a mixed solution for later use;
(2) ultrasonically stirring 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.
In the step (2), the temperature of the ultrasonic wave is 40-80 ℃, the frequency is 0.5-2MHz, and the time is 10-30 min.
In the step (2), the rotation speed of the stirring is 60-100 rpm.
In the step (3), the demulsification method is alternating current demulsification.
The voltage of the alternating current is 200-2000V, and the frequency is 900-1100 Hz;
the alternating current adopts two insulated electrodes to discharge, and the distance between the insulated electrodes is 10-20 mm.
And (3) demulsifying for 15-30 min.
In the step (1), the particle size after sieving is 0.3-0.6 mm;
the mass fraction of the tea cake in 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 product obtained after centrifugal separation to obtain the finished oil.
And further, deacidifying and decoloring the oil product obtained after centrifugal separation by adopting 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 process for extracting the residual oil from the oil tea cakes comprises the steps of crushing and sieving the oil tea cakes, and adding water to prepare a mixed solution for later use; ultrasonically stirring 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 with demulsification, the extraction rate of the residual oil in the tea oil cake is 75-80%, and compared with the traditional method, the method has the advantages that the extraction rate of the residual oil is improved by 5-10%, the extraction time is short, the extraction efficiency is high, and the energy consumption is low. The method takes water as a solvent, so that the oil product obtained by extraction does not contain an organic solvent, the problem of oil product quality deterioration caused by taking hexane as the solvent in the prior art is solved, and the problems of environmental pollution and the like caused by separating hexane from the oil product in the later period are avoided.
The process for extracting the residual oil provided by the invention has the advantages of low cost of raw materials, high quality of the prepared oil product, no degumming and other refining steps, good stability, long-time continuous operation and suitability for large-scale industrial operation.
2. According to the process for extracting the residual oil from the oil tea cake, provided by the invention, the temperature, the frequency and the time of ultrasonic treatment are controlled, so that the residual oil in the oil tea cake can be quickly separated from other components and enters a water phase, the extraction time is shortened, and the extraction efficiency is improved. The oil-tea camellia cake is placed for sedimentation and aggregation by controlling the stirring speed of the ultrasound so as to improve the extraction efficiency of the residual oil.
3. According to the process for extracting the residual oil from the oil tea cake, the alternating current demulsification method is adopted, other impurities cannot be introduced into the oil product, the quality of the oil product is ensured, the added water can be recycled after centrifugal separation, and resources are saved; and the alternating current demulsification method can shorten the demulsification time, can control 15min to finish demulsification, and shortens the extraction time.
Under the action of an alternating electrostatic field, the voltage direction is continuously and periodically changed, so that the surface charge of the liquid drops is periodically changed, the liquid shape is continuously overturned along with the change of the alternating electrostatic field under the action of electrostatic force, and when the force is large enough, the liquid drops deform to a certain degree and collide to generate coalescence behavior, so that emulsion breaking of the emulsion is realized. The voltage of the alternating current is controlled to be 200-2000V, because the over-high voltage can cause the breakdown of the insulated electrode and damage the electrode, the energy consumption is high, and the over-low voltage is not beneficial to oil-water separation. The frequency of the alternating current is 900-1100Hz, which is suitable for the range of 900-1100Hz because the liquid is deformed due to insufficient deformation when the frequency is too low, the liquid is deformed due to too high frequency and too high deformation speed, and liquid drops are not as close to aggregation.
At least one of glass, plastic or quartz is used as an insulated electrode, so that the stability of the oil-water mixture can be ensured, the electrical performance of the oil-water mixture is not changed along with time, higher electric field intensity can be obtained 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 used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a process flow chart of a process for extracting residual oil from oil tea cakes in example 1 of the present invention;
reference numerals:
1-a pulverizer; 2-a hoisting machine; 3-powder selecting machine; 4-a stirrer; 5-an ultrasonic reactor; 6-a filter; 7-a decanter; 8-a centrifuge; 9-alternating current demulsifying device.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by the manufacturer, and are all conventional reagents and products available on the market.
Example 1
The embodiment provides a process for extracting residual oil from oil tea cakes, which comprises the following steps,
the camellia oleifera cake dregs cleaned by distilled water and subjected to impurity removal are put into a pulverizer 1 with the rotating speed of 150r/min for pulverizing for 30min, sent to a powder concentrator 3 by a lifter 2 for sieving until the particle size is not more than 0.3mm, wherein the filling rate of the camellia oleifera cake dregs in the pulverizer is 15%, and the filling rate of a pulverizing medium is 15%.
Accurately weighing 0.5kg of pulverized oil-tea camellia cake and 4.5kg of water, mixing in a stirrer 4, and preparing into 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 camellia cakes into water under the action of ultrasonic waves; the ultrasonic temperature is 80 ℃, the ultrasonic time is 30min, the frequency is 2MHz, and the stirring speed is 100 rpm; then the mixed liquid after ultrasonic treatment is introduced into a filter 6, and the residual solid is filtered out to obtain 4.3kg of emulsion.
Feeding the emulsion into an alternating current emulsion breaker 9, breaking the emulsion for 15min under the conditions that the voltage is 1000V, the frequency is 900Hz and the distance between insulating electrodes is 10mm, and then feeding the emulsion into a decanter 7 for standing for 30min to layer the solution; and then taking the upper layer liquid, putting the upper layer liquid into a centrifugal machine 8 with the rotating speed of 5000rpm, and centrifuging for 10min to obtain the oil product.
Deacidifying and decolorizing the oil product with activated clay to obtain the finished oil.
Through determination, the extraction rate of the residual oil in the tea oil cake is 80 percent; wherein, the extraction rate is obtained by a formula I; the mass content of the residual oil in the oil-tea camellia cake is obtained by analysis of a Soxhlet extraction method.
Example 2
The embodiment provides a process for extracting residual oil from oil tea cakes, which comprises the following steps,
the method comprises the steps of putting oil tea cake dregs which are cleaned by distilled water and have impurities removed into a grinder 1 with the rotation speed of 200r/min for grinding for 40min, sending the oil tea cake dregs to a powder concentrator 3 through a lifter 2 for sieving until the particle size of the oil tea cake dregs is not more than 5mm, wherein the filling rate of the oil tea cake dregs in the grinder is 20%, and the filling rate of a grinding medium is 18%.
Accurately weighing 1kg of pulverized oil-tea camellia cake and 4kg of water, mixing in a stirrer 4, and preparing into 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 camellia cakes into water under the action of ultrasonic waves; the ultrasonic temperature is 60 ℃, the ultrasonic time is 20min, the frequency is 1MHz, and the stirring speed is 60 rpm; then, the mixed solution after the ultrasonic treatment was introduced into a filter 6, and the residual solid was filtered off to obtain 3.6kg of an emulsion.
Feeding the emulsion into an alternating current emulsion breaker 9, breaking the emulsion for 18min under the conditions that the voltage is 1500V, the frequency is 1000Hz and the distance between insulating electrodes is 10mm, and then feeding the emulsion into a decanter 7 for standing for 30min to layer the solution; and then taking the upper layer liquid, putting the upper layer liquid into a centrifugal machine 8 with the rotating speed of 5000rpm, and centrifuging for 10min to obtain the oil product.
Deacidifying and decolorizing the oil product with activated clay to obtain the finished oil.
The determination shows that the extraction rate of the residual oil in the tea oil cake is 78%.
Example 3
The embodiment provides a process for extracting residual oil from oil tea cakes, which comprises the following steps,
the camellia oleifera cake after being cleaned by distilled water and impurities are removed is put into a pulverizer 1 with the rotating speed of 160r/min for pulverizing for 40min, and is sent to a powder concentrator 3 by a lifter 2 for sieving until the particle size is not more than 6mm, wherein the filling rate of the camellia oleifera cake in the pulverizer is 16%, and the filling rate of a pulverizing medium is 23%.
Accurately weighing 1.5kg of pulverized oil-tea camellia cake and 3.5kg of water, mixing in a stirrer 4, and preparing into 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 camellia cakes into water under the action of ultrasonic waves; the ultrasonic temperature is 50 ℃, the ultrasonic time is 30min, the frequency is 0.4MHz, and the stirring speed is 80 rpm; then the mixed liquid after ultrasonic treatment is introduced into a plate-and-frame filter press, and the residual solid is filtered out to obtain 3.0kg of emulsion.
Feeding the emulsion into an alternating current emulsion breaker 9, breaking the emulsion for 16min under the conditions that the voltage is 500V, the frequency is 1100Hz and the distance between insulating electrodes is 18mm, and then feeding the emulsion into a decanter 7 for standing for 30min to layer the solution; and then taking the upper layer liquid, putting the upper layer liquid into a centrifugal machine 8 with the rotating speed of 5000rpm, and centrifuging for 10min to obtain the oil product.
The determination shows that the extraction rate of the residual oil in the tea oil cake is 75%.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A process for extracting residual oil from oil tea cakes is characterized by comprising the following steps,
(1) crushing and sieving the oil tea cakes, and adding water to prepare a mixed solution for later use;
(2) ultrasonically stirring 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.
2. The process for extracting residual oil from oil tea cakes according to claim 1, wherein in the step (2), the temperature of the ultrasound is 40-80 ℃, the frequency is 0.5-2MHz, and the time is 10-30 min.
3. The process for extracting residual oil from oil tea cakes according to claim 1 or 2, wherein the rotation speed of the stirring in the step (2) is 60-100 rpm.
4. The process for extracting residual oil from oil tea cakes according to any one of claims 1 to 3, wherein the demulsification method in the step (3) is alternating current demulsification.
5. The process for extracting residual oil from oil tea cakes as claimed in claim 4, wherein the voltage of the alternating current is 200-2000V, and the frequency is 900-1100 Hz;
the alternating current adopts two insulated electrodes to discharge, and the distance between the insulated electrodes is 10-20 mm.
6. The process for extracting the residual oil from the oil tea cakes according to the claim 5, wherein the time for demulsification in the step (3) is 15-30 min.
7. The process for extracting residual oil from oil tea cakes according to any one of claims 1 to 6, wherein in the step (1), the particle size after sieving is 0.3 to 0.6 mm;
the mass fraction of the tea cake in the mixed solution is 10-30%.
8. The process for extracting residual oil from oil tea cakes according to any one of claims 1 to 7, which is characterized by further comprising the treatment step of deacidifying and decoloring the oil product obtained after the centrifugal separation to obtain finished oil.
9. The process for extracting residual oil from oil tea cakes according to claim 8, wherein the oil products obtained after centrifugal separation are deacidified and decolored by activated clay.
10. The process for extracting residual oil from oil tea cakes according to claim 5, wherein the material of the insulated electrode is at least one of glass, plastic and quartz.
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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 |
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Cited By (2)
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