Preparation process of tea oil

Abstract

The invention discloses a preparation process of tea oil, and relates to the technical field of biological medicine and food processing. Comprising the following technological processes: preparing crude oil; a refining process; washing with water; a decolorization process; the oil loading amount is 55-65% of the volume of the deodorization pot, an indirect heating medium is added into the deodorization pot, the oil temperature is increased to 150 DEG C, direct steam with the pressure of 0.3-0.4 Mpa is added, it is guaranteed that the decolored crude oil is fully turned over, the working pressure is kept to be 100-400 pa, and when the oil temperature is increased to 240 DEG C, according to the mass timing of the decolored crude oil, the decolored crude oil is heated to 240 DEG C; half an hour before the deodorization is finished, closing the heating medium, when the temperature of the deodorized crude oil is reduced to 160 DEG C, directly steaming in a semi-closed manner, and when the deodorized crude oil is cooled to 50 DEG C, feeding the deodorized crude oil into a crystallization box for winterization to obtain a finished product of tea oil; the tea oil is more stable in the storage process and not prone to quality change, high-quality tea oil can be obtained through fine processing, the additional value of the tea oil product is increased, and therefore the purpose of increasing economic benefits is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of biomedicine and food processing, and in particular to a preparation process of tea oil. Background Art

[0002] Camellia oleifera is a unique woody oil crop in my country and is also an oil crop that my country has vigorously developed. Camellia oleifera has a high comprehensive utilization value. It is rich in unsaturated fatty acids, monounsaturated fatty acids, vitamin E, squalene, tea polyphenols and other bioactive substances. Among them, monounsaturated fatty acids can improve blood antioxidant capacity, lower cholesterol, prevent the occurrence of cardiovascular and cerebrovascular diseases, and reduce the incidence of diseases caused by metabolic disorders such as insulin antagonism diabetes. It is the first choice of edible oil for patients with diabetes, cardiovascular and cerebrovascular diseases and people with three highs; unsaturated fatty acids have the characteristic of "non-fat aggregation". Not only do they not deposit in the internal organs and subcutaneous tissues, but they can also prevent fat deposition and avoid obesity. In medicine, tea oil is used to assist in the treatment of obesity. It is a healthy edible oil that "eats oil without fear of obesity"; vitamin E is a fat-soluble vitamin, also known as tocopherol, which can promote the secretion of sex hormones, increase the vitality of male sperm, increase the concentration of female estrogen, and improve fertility. It can also be used to prevent and treat male infertility, burns, capillary hemorrhage, menopausal syndrome, beauty and other aspects. Recently, it has been found that vitamin E can inhibit lipid peroxidation in the lens of the eye, dilate peripheral blood vessels, improve blood circulation, and prevent the occurrence and development of myopia; among them, unsaturated fatty acids have high medicinal or edible value, which can improve the brain development and brain nerve function of the fetus, enhance the information function of brain cells, and promote the normal development of the human brain; enhance the vision of the fetus; promote the functional and physical development of the fetus, especially for maldeveloped fetuses and premature babies, and can promote their functional development to normal levels. At the same time, it also has an important impact on the postpartum body shape of pregnant women. Squalene is a lipid unsaponifiable matter that has multiple physiological functions, such as increasing the activity of superoxide dismutase (SOD), enhancing the body's immune system, improving sexual function, anti-aging, anti-fatigue, and anti-tumor. It is a non-toxic biologically active substance with disease prevention and treatment effects. Tea polyphenols is the general term for polyphenols in tea oil, including flavanols, anthocyanins, flavonoids, flavonols, and phenolic acids. It is an all-natural antioxidant that has the effects of lowering cholesterol, anti-aging, anti-radiation, scavenging free radicals in the human body, and inhibiting cancer cells.

[0003] In the prior art, tea oil is mostly processed by traditional rural methods, and the process is: roasting, crushing, pounding, pressing, filtering, and then the traditional "earth" tea oil is produced. Since this kind of tea oil has not been refined, it contains more harmful substances and produces thick smoke during cooking, which not only affects the environment but also is harmful to the human body. Therefore, it is necessary to provide an efficient tea oil preparation process to improve the yield and quality of tea oil and meet market demand. Summary of the invention

[0004] The purpose of the present invention is to provide a preparation process of tea oil, which solves the above-mentioned technical problems.

[0005] To achieve the above object, the present invention provides the following technical solution: a preparation process of tea oil, comprising the following process flow:

[0006] A. Preparation of crude oil: Collect tea seeds, peel, crush, condition and press to obtain crude oil for later use;

[0007] B. Refining process: After sampling and quality inspection of the crude oil for use, alkali refining and soap removal are carried out;

[0008] C. Washing process: add the alkali refined crude oil into the washing pot and heat it to 80-90°C, then evenly add dilute brine, the weight of which is 8-10% of the alkali refined crude oil;

[0009] D. Decolorization process: vacuum the washed crude oil into the decolorization pot, stir while heating to 90℃, and observe through the sight glass that there is no mist or bubbles on the oil surface inside the decolorization pot, vacuum inhale white clay and activated carbon;

[0010] E. Deodorization process: vacuum the bleached crude oil into the deodorization pot, and fill the oil in an amount of 55-65% of the capacity of the deodorization pot. Add indirect heating medium into the deodorization pot, heat the oil temperature to 150°C, add direct steam with a pressure of 0.3-0.4Mpa to ensure sufficient stirring of the bleached crude oil, and keep the working pressure at 100-400pa. When the oil temperature is heated to 240°C, start timing according to the quality of the bleached crude oil. Half an hour before the end of deodorization, turn off the heating medium, and half-close the direct steam when the temperature of the deodorized crude oil drops to 160°C. When the deodorized crude oil is cooled to 50°C, send it to the crystallization box for winterization to obtain the finished tea oil.

[0011] Through shelling, crushing, conditioning, pressing and other processes of tea seeds, the yield of tea oil can be effectively increased.

[0012] By using multiple processes such as alkali refining and desoaping, water washing, bleaching, and deodorization, impurities, fatty acids and other harmful components in the oil can be removed, while retaining the rich nutrients in the oil to optimize the quality of the tea oil. The deodorization process can remove the odor in the tea oil, making the tea oil more stable during storage and less likely to change in quality. Through fine processing, high-quality tea oil can be obtained, which will increase the added value of tea oil products and achieve the goal of increasing economic benefits.

[0013] Preferably, the process A further comprises the following steps:

[0014] A1. Shelling: First, the collected tea seeds need to be screened to remove impurities, and then the dried tea seeds are put into a milling machine or a manual shelling machine for shelling. The purpose of shelling is to separate the outer shell from the kernel of the tea seeds.

[0015] A2. Crushing: The kernels that have been peeled off the shell are crushed, usually using physical methods such as grinders or blenders;

[0016] A3. Conditioning: The kernels after crushing may have irregular particle sizes, which need to be tempered to make the moisture and lipids in the kernels evenly distributed, which can improve the quality and yield of the oil. The main tempering methods include adding water, heating and stirring;

[0017] A4. Pressing: Finally, put the tempered camellia seeds into the press for pressing. During the pressing process, the fat in the camellia seeds will be squeezed out to form oil, thus obtaining the spare crude oil.

[0018] Through this process, tea seeds can be processed quickly, greatly improving processing efficiency and reducing processing costs. Through crushing and tempering, the moisture and lipids inside the tea seeds can be evenly distributed, thereby improving the quality and yield of the tea seeds and obtaining high-quality oils. With less energy and equipment consumption, the goals of energy saving and environmental protection can be achieved, making the operation process more convenient, easy to control, and user-friendly, reducing technical difficulty, and through scientific process parameters and processing operation procedures, stable processing quality can be achieved in actual production, ensuring product quality and increasing market competitiveness.

[0019] Preferably, the process B further comprises the following steps:

[0020] B1. Add the spare crude oil into the neutralization pot through a vacuum pump, stir for 10 minutes and take a sample, send it to the quality inspection department for testing, and determine the amount of alkali and the concentration of alkali solution according to the quality of the spare crude oil;

[0021] B2. When adding alkali solution, the standby oil temperature should be controlled at 30-40℃;

[0022] B3. All the alkali solution is added evenly into the neutralization pot at a stirring speed of 60r / min within 10-15min. After all the alkali solution is added, continue stirring for 30-40min to ensure complete neutralization, until soap particles are generated and separated from the spare crude oil, start heating, and raise the oil temperature to 80℃ at a speed of 1℃ per minute. At this time, the stirring speed is 30r / min;

[0023] B4. After heating, evenly add 5% diluted brine to the standby crude oil, the weight of the diluted brine is 5-10% of the weight of the standby crude oil, the temperature of the diluted brine is the same as or slightly higher than the temperature of the standby crude oil, and continue stirring for 5 minutes after the addition of the diluted brine is completed until the soap particles sink rapidly, and stop stirring;

[0024] B5. Let it stand and settle for 8-12 hours. After the oil soap is separated, add the upper reserved crude oil into the water washing pot, then put the lower soap stock into the neutralization pot, and take samples to send to the Quality Inspection Department for testing.

[0025] Ensure the quality of the spare crude oil so that the amount of alkali and the concentration of alkali solution can be accurately determined in the subsequent process, control the oil temperature when the alkali solution is added, ensure that the alkali solution is added to the spare crude oil under the correct temperature conditions, ensure that all the alkali solution is evenly added to the neutralization pot in a short time, ensure that the neutralization process is sufficient, soap particles are generated and separated from the spare crude oil, control the rate of the heating process, gradually increase the oil temperature, and reach the appropriate temperature conditions for subsequent operations, ensure that stirring is continued for 5 minutes after the addition of dilute brine, so that the soap particles can quickly sink and form precipitation, thereby facilitating separation and processing, and by standing and settling for 8-12 hours, the oil soap is stratified, so that the upper layer of spare crude oil is conveniently added to the water washing pot for subsequent processing, and the lower layer of soap stock is removed for further testing, which can ensure smooth production process, shorten production cycle, reduce resource waste and cost, and at the same time, can produce crude oil products that meet quality requirements.

[0026] Preferably, during the specific operation in process C, the concentration of the dilute brine should be 2-3%, and the stirring speed should be maintained at 30r / min when the dilute brine is added to the washing pot to ensure complete washing and remove impurities such as residual alkali solution, fine soap particles, etc. in the alkali-refined crude oil as much as possible. After the alkali-refined crude oil is washed, it is allowed to stand for 30 minutes, and after the oil and water are separated, the lower layer of waste water is discharged. Process C can be repeated two to three times to improve the quality of the washed crude oil.

[0027] By using dilute salt water for washing, impurities, alkali liquor and tiny soap particles and other residues in alkali-refined crude oil can be removed, thereby improving the quality and purity of the crude oil. Before washing the alkali-refined crude oil, the waste water is discharged to reduce the discharge of waste water and the pollution to the environment. Using dilute salt water for washing can not only improve the washing effect, but also reduce the pollution to the environment, thereby achieving dual protection for humans and the environment, effectively improving the purity and quality of the crude oil, reducing waste water discharge, saving energy consumption, and also meeting the safety and environmental protection requirements.

[0028] Preferably, in the process D, the amount of activated clay and activated carbon depends on the color depth of the washed crude oil, generally 2-3% or 0.5-1% of the total amount of the washed crude oil. When the activated clay and activated carbon are absorbed by the decolorization pot, they should be fully stirred and the vacuum degree should be maintained at -0.96Mpa. The decolorization time is 30min. After the washed crude oil is decolorized, the vacuum of the decolorization pot is eliminated, and the washed crude oil is pumped into a filter press for filtration to remove impurities such as activated clay and activated carbon to obtain decolorized crude oil, which is then sampled and sent to the quality inspection department for testing.

[0029] The use of activated clay and activated carbon can effectively remove pigments, impurities and other undesirable substances in the washed crude oil, thereby significantly improving the quality of the crude oil and making it meet commercial standards. At the same time, the washed crude oil is filtered using a filter press to remove residual impurities such as activated clay and activated carbon, further improving the purity and quality of the decolorized crude oil. In the entire process, scientific feeding ratio, vacuum control and decolorization time can effectively ensure the decolorization effect, reduce operating costs and improve process efficiency.

[0030] Preferably, in the process E, after the deodorized crude oil is winterized for 48 hours, it is filtered to obtain finished tea oil, and pumped into the finished oil tank. The tea oil in the finished oil tank is sampled and sent to the quality inspection department for testing. After passing the test, it can be filled and stored in the finished product warehouse.

[0031] After the deodorized crude oil is winterized for 48 hours, it can be filtered to remove impurities in the oil and make the oil purer. At the same time, this process can further improve the stability and antioxidant capacity of the oil. The finished oil tested by the quality inspection department can ensure the safety and quality of the product and ensure that the product will not cause harm to human health. By using professional tea seed oil processing equipment, high-quality tea seed oil can be produced quickly and stably. At the same time, automatic filling equipment can also improve production efficiency.

[0032] Preferably, after the alkali-refined crude oil is sampled and sent to the quality inspection department for testing, the acid value is 0.-1.0 (mgKOH / g) and meets the standard;

[0033] After the decolorized crude oil is sampled and sent to the quality inspection department for testing, it meets the standards when the acid value is 0.5-2.8 (mgKOH / g), the color is 133.3mm for the Lovibond colorimetric trough, the yellow color is Y10 Lovibond units, and the red color is R1.5 Lovibond units;

[0034] After the finished tea oil is sampled and sent to the quality inspection department for testing, it meets the standards when the acid value is less than 0.5 (mgKOH / g), the peroxide value is less than 0.25 (g / 100g), the color is 133.3mm in the Lovibond colorimetric trough, the yellow is Y10 Lovibond unit, and the red is R1.5 Lovibond unit.

[0035] Compared with the related art, the preparation process of tea oil provided by the present invention has the following beneficial effects:

[0036] The invention provides a preparation process of tea oil. The production of tea oil can be effectively improved by shelling, crushing, conditioning, pressing and other processes on tea seeds. Impurities, fatty acids and other harmful components in the oil can be removed by alkali refining, soap removal, water washing, decolorization, deodorization and other processes, while rich nutrition in the oil is retained to optimize the quality of the tea oil. The deodorization process can remove the peculiar smell in the tea oil, making the tea oil more stable during storage and less prone to quality changes. High-quality tea oil can be obtained through fine processing, and the added value of the tea oil product is improved, thereby achieving the purpose of increasing economic benefits.

[0037] The invention provides a preparation process of camellia oil, which can quickly process camellia seeds, greatly improve processing production efficiency, reduce processing costs, and evenly distribute moisture and lipids in the camellia seeds through treatments such as crushing and conditioning, thereby improving the quality and yield of the camellia seeds and obtaining high-quality oils. The invention achieves the goals of energy saving and environmental protection through less energy and equipment consumption, makes the operation process more convenient, easy to control, and user-friendly, reduces technical difficulty, and can achieve stable processing quality in actual production through scientific process parameters and processing operation procedures, thereby ensuring product quality and increasing market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0039] See also Figure 1 The present invention provides a technical solution, including the following process flow:

[0040] A. Preparation of crude oil: Collect tea seeds, peel, crush, condition and press to obtain crude oil for later use;

[0041] B. Refining process: After sampling and quality inspection of the crude oil for use, alkali refining and soap removal are carried out;

[0042] C. Washing process: add the alkali refined crude oil into the washing pot and heat it to 80-90°C, then evenly add dilute brine, the weight of which is 8-10% of the alkali refined crude oil;

[0043] D. Decolorization process: vacuum the washed crude oil into the decolorization pot, stir while heating to 90℃, and observe through the sight glass that there is no mist or bubbles on the oil surface inside the decolorization pot, vacuum inhale white clay and activated carbon;

[0044] E. Deodorization process: vacuum the bleached crude oil into the deodorization pot, and fill the oil in an amount of 55-65% of the capacity of the deodorization pot. Add indirect heating medium into the deodorization pot, heat the oil temperature to 150°C, add direct steam with a pressure of 0.3-0.4Mpa to ensure sufficient stirring of the bleached crude oil, and keep the working pressure at 100-400pa. When the oil temperature is heated to 240°C, start timing according to the quality of the bleached crude oil. Half an hour before the end of deodorization, turn off the heating medium, and half-close the direct steam when the temperature of the deodorized crude oil drops to 160°C. When the deodorized crude oil is cooled to 50°C, send it to the crystallization box for winterization to obtain the finished tea oil.

[0045] Through shelling, crushing, conditioning, pressing and other processes of tea seeds, the yield of tea oil can be effectively increased.

[0046] By using multiple processes such as alkali refining and desoaping, water washing, bleaching, and deodorization, impurities, fatty acids and other harmful components in the oil can be removed, while retaining the rich nutrients in the oil to optimize the quality of the tea oil. The deodorization process can remove the odor in the tea oil, making the tea oil more stable during storage and less likely to change in quality. Through fine processing, high-quality tea oil can be obtained, which will increase the added value of tea oil products and achieve the goal of increasing economic benefits.

[0047] Furthermore, the process A further comprises the following steps:

[0048] A1. Shelling: First, the collected tea seeds need to be screened to remove impurities, and then the dried tea seeds are put into a milling machine or a manual shelling machine for shelling. The purpose of shelling is to separate the outer shell from the kernel of the tea seeds.

[0049] A2. Crushing: The kernels that have been peeled off the shell are crushed, usually using physical methods such as grinders or blenders;

[0050] A3. Conditioning: The kernels after crushing may have irregular particle sizes, which need to be tempered to make the moisture and lipids in the kernels evenly distributed, which can improve the quality and yield of the oil. The main tempering methods include adding water, heating and stirring;

[0051] A4. Pressing: Finally, put the tempered camellia seeds into the press for pressing. During the pressing process, the fat in the camellia seeds will be squeezed out to form oil, thus obtaining the spare crude oil.

[0052] Through this process, tea seeds can be processed quickly, greatly improving processing efficiency and reducing processing costs. Through crushing and tempering, the moisture and lipids inside the tea seeds can be evenly distributed, thereby improving the quality and yield of the tea seeds and obtaining high-quality oils. With less energy and equipment consumption, the goals of energy saving and environmental protection can be achieved, making the operation process more convenient, easy to control, and user-friendly, reducing technical difficulty, and through scientific process parameters and processing operation procedures, stable processing quality can be achieved in actual production, ensuring product quality and increasing market competitiveness.

[0053] Furthermore, the process B specifically includes the following steps:

[0054] B1. Add the spare crude oil into the neutralization pot through a vacuum pump, stir for 10 minutes and take a sample, send it to the quality inspection department for testing, and determine the amount of alkali and the concentration of alkali solution according to the quality of the spare crude oil;

[0055] B2. When adding alkali solution, the standby oil temperature should be controlled at 30-40℃;

[0056] B3. All the alkali solution is added evenly into the neutralization pot at a stirring speed of 60r / min within 10-15min. After all the alkali solution is added, continue stirring for 30-40min to ensure complete neutralization, until soap particles are generated and separated from the spare crude oil, start heating, and raise the oil temperature to 80℃ at a speed of 1℃ per minute. At this time, the stirring speed is 30r / min;

[0057] B4. After heating, evenly add 5% diluted brine to the standby crude oil, the weight of the diluted brine is 5-10% of the weight of the standby crude oil, the temperature of the diluted brine is the same as or slightly higher than the temperature of the standby crude oil, and continue stirring for 5 minutes after the addition of the diluted brine is completed until the soap particles sink rapidly, and stop stirring;

[0058] B5. Let it stand and settle for 8-12 hours. After the oil soap is separated, add the upper reserved crude oil into the water washing pot, then put the lower soap stock into the neutralization pot, and take samples to send to the Quality Inspection Department for testing.

[0059] Ensure the quality of the spare crude oil so that the amount of alkali and the concentration of alkali solution can be accurately determined in the subsequent process, control the oil temperature when the alkali solution is added, ensure that the alkali solution is added to the spare crude oil under the correct temperature conditions, ensure that all the alkali solution is evenly added to the neutralization pot in a short time, ensure that the neutralization process is sufficient, soap particles are generated and separated from the spare crude oil, control the rate of the heating process, gradually increase the oil temperature, and reach the appropriate temperature conditions for subsequent operations, ensure that stirring is continued for 5 minutes after the addition of dilute brine, so that the soap particles can quickly sink and form precipitation, thereby facilitating separation and processing, and by standing and settling for 8-12 hours, the oil soap is stratified, so that the upper layer of spare crude oil is conveniently added to the water washing pot for subsequent processing, and the lower layer of soap stock is removed for further testing, which can ensure smooth production process, shorten production cycle, reduce resource waste and cost, and at the same time, can produce crude oil products that meet quality requirements.

[0060] Furthermore, during the specific operation in process C, the concentration of the dilute brine should be 2-3%. When the dilute brine is added to the washing pot, the stirring speed should be maintained at 30r / min to ensure complete washing and remove impurities such as residual alkali solution and fine soap particles in the alkali-refined crude oil as much as possible. After the alkali-refined crude oil is washed, it is allowed to stand for 30 minutes. After the oil and water are separated, the lower layer of waste water is released. Process C can be repeated two to three times to improve the quality of the washed crude oil.

[0061] By using dilute salt water for washing, impurities, alkali liquor and tiny soap particles and other residues in alkali-refined crude oil can be removed, thereby improving the quality and purity of the crude oil. Before washing the alkali-refined crude oil, the waste water is discharged to reduce the discharge of waste water and the pollution to the environment. Using dilute salt water for washing can not only improve the washing effect, but also reduce the pollution to the environment, thereby achieving dual protection for humans and the environment, effectively improving the purity and quality of the crude oil, reducing waste water discharge, saving energy consumption, and also meeting the safety and environmental protection requirements.

[0062] Furthermore, in the process D, the amount of activated clay and activated carbon depends on the color depth of the washed crude oil, generally 2-3% or 0.5-1% of the total amount of the washed crude oil. When the activated clay and activated carbon are absorbed by the decolorization pot, they should be fully stirred and the vacuum degree should be maintained at -0.96Mpa. The decolorization time is 30min. After the washed crude oil is decolorized, the vacuum of the decolorization pot is eliminated, and the washed crude oil is pumped into a filter press for filtration to remove impurities such as activated clay and activated carbon to obtain decolorized crude oil, which is then sampled and sent to the quality inspection department for testing.

[0063] The use of activated clay and activated carbon can effectively remove pigments, impurities and other undesirable substances in the washed crude oil, thereby significantly improving the quality of the crude oil and making it meet commercial standards. At the same time, the washed crude oil is filtered using a filter press to remove residual impurities such as activated clay and activated carbon, further improving the purity and quality of the decolorized crude oil. In the entire process, scientific feeding ratio, vacuum control and decolorization time can effectively ensure the decolorization effect, reduce operating costs and improve process efficiency.

[0064] Furthermore, in the process E, after the deodorized crude oil is winterized for 48 hours, it is filtered to obtain finished tea oil, and pumped into the finished oil tank. The tea oil in the finished oil tank is sampled and sent to the quality inspection department for testing. After passing the test, it can be filled and stored in the finished product warehouse.

[0065] After the deodorized crude oil is winterized for 48 hours, it can be filtered to remove impurities in the oil and make the oil purer. At the same time, this process can further improve the stability and antioxidant capacity of the oil. The finished oil tested by the quality inspection department can ensure the safety and quality of the product and ensure that the product will not cause harm to human health. By using professional tea seed oil processing equipment, high-quality tea seed oil can be produced quickly and stably. At the same time, automatic filling equipment can also improve production efficiency.

[0066] Wherein, after the alkali-refined crude oil is sampled and sent to the quality inspection department for testing, the acid value is 0.-1.0 (mgKOH / g) and meets the standard;

[0067] After the decolorized crude oil is sampled and sent to the quality inspection department for testing, it meets the standards when the acid value is 0.5-2.8 (mgKOH / g), the color is 133.3mm for the Lovibond colorimetric trough, the yellow color is Y10 Lovibond units, and the red color is R1.5 Lovibond units;

[0068] After the finished tea oil is sampled and sent to the quality inspection department for testing, it meets the standards when the acid value is less than 0.5 (mgKOH / g), the peroxide value is less than 0.25 (g / 100g), the color is 133.3mm in the Lovibond colorimetric trough, the yellow is Y10 Lovibond unit, and the red is R1.5 Lovibond unit.

[0069] The entire process is transported through pipelines, and the finished oil is filled in a Class D air purification room with ozone disinfection; in the production pipeline, the raw material warehouse, filling room, and finished product warehouse are separated and isolated; process equipment parameters:

[0070] Neutralization pot (alkali refining pot): 5 tons / pot, temperature is 80℃, reaction time is 24h;

[0071] Water washing pot: 5 tons / pot, temperature is 80-90℃, time is 5h;

[0072] Decolorization pot: 4 tons / pot, temperature is 90-105℃, decolorization time is 4h, vacuum degree is 0.95Mpa; Deodorization pot: 4 tons / pot, temperature is 245℃, deodorization time is 8h, vacuum degree is 260pa.

Claims

1. A process for preparing tea oil, comprising, characterized in that: The process includes the following: A. Preparation of crude oil: Collect tea seeds, peel, crush, condition and press to obtain crude oil for later use; B. Refining process: After sampling and quality inspection of the crude oil for use, alkali refining and soap removal are carried out; C. Washing process: add the alkali refined crude oil into the washing pot and heat it to 80-90°C, then evenly add dilute brine, the weight of which is 8-10% of the alkali refined crude oil; D. Decolorization process: vacuum the washed crude oil into the decolorization pot, stir while heating to 90℃, and observe through the sight glass that there is no mist or bubbles on the oil surface inside the decolorization pot, vacuum inhale white clay and activated carbon; E. Deodorization process: vacuum the bleached crude oil into the deodorization pot, and fill the oil in an amount of 55-65% of the capacity of the deodorization pot. Add indirect heating medium into the deodorization pot, heat the oil temperature to 150°C, add direct steam with a pressure of 0.3-0.4Mpa to ensure sufficient stirring of the bleached crude oil, and keep the working pressure at 100-400pa. When the oil temperature is heated to 240°C, start timing according to the quality of the bleached crude oil. Half an hour before the end of deodorization, turn off the heating medium, and half-close the direct steam when the temperature of the deodorized crude oil drops to 160°C. When the deodorized crude oil is cooled to 50°C, send it to the crystallization box for winterization to obtain the finished tea oil.

2. The process for preparing tea oil according to claim 1, characterized in that: The process A specifically includes the following steps: A1. Shelling: First, the collected tea seeds need to be screened to remove impurities, and then the dried tea seeds are put into a milling machine or a manual shelling machine for shelling. The purpose of shelling is to separate the outer shell from the kernel of the tea seeds. A2. Crushing: The kernels that have been peeled off the shell are crushed, usually using physical methods such as grinders or blenders; A3. Conditioning: The kernels after crushing may have irregular particle sizes, which need to be tempered to make the moisture and lipids in the kernels evenly distributed, which can improve the quality and yield of the oil. The main tempering methods include adding water, heating and stirring; A4. Pressing: Finally, put the tempered camellia seeds into the press for pressing. During the pressing process, the fat in the camellia seeds will be squeezed out to form oil, thus obtaining the spare crude oil.

3. A process for preparing tea oil according to claim 1 or 2, characterized in that: The process B specifically includes the following steps: B1. Add the spare crude oil into the neutralization pot through a vacuum pump, stir for 10 minutes and take a sample, send it to the quality inspection department for testing, and determine the amount of alkali and the concentration of alkali solution according to the quality of the spare crude oil; B2. When adding alkali solution, the standby oil temperature should be controlled at 30-40℃; B3. All the alkali solution is added evenly into the neutralization pot at a stirring speed of 60r / min within 10-15min. After all the alkali solution is added, continue stirring for 30-40min to ensure complete neutralization, until soap particles are generated and separated from the spare crude oil, start heating, and raise the oil temperature to 80℃ at a speed of 1℃ per minute. At this time, the stirring speed is 30r / min; B4. After heating, evenly add 5% diluted brine to the standby crude oil, the weight of the diluted brine is 5-10% of the weight of the standby crude oil, the temperature of the diluted brine is the same as or slightly higher than the temperature of the standby crude oil, and continue stirring for 5 minutes after the addition of the diluted brine is completed until the soap particles sink rapidly, and stop stirring; B5. Let it settle for 8-12 hours. After the oil soap is separated, add the upper reserved crude oil into the water washing pot, then put the lower soap stock into the neutralization pot, and take samples to send to the quality inspection department for testing.

4. The process for preparing tea oil according to claim 3, characterized in that: During the specific operation in process C, the concentration of the dilute brine should be 2-3%. When the dilute brine is added to the washing pot, the stirring speed should be maintained at 30r / min to ensure complete washing and remove impurities such as residual alkali solution, fine soap particles, etc. in the alkali-refined crude oil as much as possible. After the alkali-refined crude oil is washed, it is allowed to stand for 30 minutes. After the oil and water are separated, the lower layer of waste water is released. Process C can be repeated two to three times to improve the quality of the washed crude oil.

5. The process for preparing tea oil according to claim 4, characterized in that: In the process D, the amount of activated clay and activated carbon depends on the color depth of the washed crude oil, which is generally 2-3% or 0.5-1% of the total amount of the washed crude oil. When the activated clay and activated carbon are absorbed by the decolorization pot, they should be fully stirred and the vacuum degree should be maintained at -0.96Mpa. The decolorization time is 30min. After the washed crude oil is decolorized, the vacuum of the decolorization pot is eliminated, and the washed crude oil is pumped into a filter press for filtration to remove impurities such as activated clay and activated carbon to obtain decolorized crude oil, which is then sampled and sent to the quality inspection department for testing.

6. The process for preparing tea oil according to claim 5, characterized in that: In the process E, after the deodorized crude oil is winterized for 48 hours, it is filtered to obtain finished tea oil, and pumped into the finished oil tank. The tea oil in the finished oil tank is sampled and sent to the quality inspection department for testing. After passing the test, it can be filled and stored in the finished product warehouse.

7. A process for preparing tea oil according to any one of claims 1 to 6, characterized in that: After the alkali-refined crude oil is sampled and sent to the quality inspection department for testing, the acid value is 0.-1.0 (mgKOH / g) and meets the standard; After the decolorized crude oil is sampled and sent to the quality inspection department for testing, it meets the standards when the acid value is 0.5-2.8 (mgKOH / g), the color is 133.3mm for the Lovibond colorimetric trough, the yellow color is Y10 Lovibond units, and the red color is R1.5 Lovibond units; After the finished tea oil is sampled and sent to the quality inspection department for testing, it meets the standards when the acid value is less than 0.5 (mgKOH / g), the peroxide value is less than 0.25 (g / 100g), the color is 133.3mm in the Lovibond colorimetric trough, the yellow is Y10 Lovibond unit, and the red is R1.5 Lovibond unit.

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