CN102559379A - Method for preparing tea seed oil at low temperature, activated rice hull ash for method, and preparation of activated rice hull ash - Google Patents
Method for preparing tea seed oil at low temperature, activated rice hull ash for method, and preparation of activated rice hull ash Download PDFInfo
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- CN102559379A CN102559379A CN201210006801XA CN201210006801A CN102559379A CN 102559379 A CN102559379 A CN 102559379A CN 201210006801X A CN201210006801X A CN 201210006801XA CN 201210006801 A CN201210006801 A CN 201210006801A CN 102559379 A CN102559379 A CN 102559379A
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Abstract
The invention discloses a method for preparing tea seed oil at low temperature, activated rice hull ash for the method, and preparation of the activated rice hull ash. The activated rice hull ash is prepared by the following steps of: 1) calcining common rice hull ash at the high temperature of 600 DEG C for 3 hours, and cooling to room temperature; 2) soaking in 3mol/L hydrochloric acid for 2 hours, and washing by using water until the pH of a washing solution is more than 6.5; and 3) drying at the temperature of 120 DEG C for 4 hours. The tea seed oil is prepared by the following steps of: tempering tea seed kernels or whole tea seeds, squeezing, filtering, adsorbing by using the activated rice hull ash, refining and separating. The temperature in the whole process is not more than 90 DEG C, the technology for preparing oil is environment-friendly and low-carbon, and harmful substances such as trans fatty acid, chloropropanol, benzopyrene and the like are not generated in the oil because the high temperature action is avoided. The invention also opens a new direction for the recycling of rich rice hull ash resources in China.
Description
Technical field
The invention belongs to the edible oil processing technique field, be specifically related to the method that a kind of low temperature prepares tea-seed oil.
The invention still further relates to a kind of activation rice hull ash and preparation thereof that is applied to this method.
Background technology
The tea seed is the distinctive woody oil resource of China, and the tea-seed oil staple is an oleic acid, and its content is up to about 75%, and lipid acid is formed with generally acknowledged in the world best Vegetable oil lipoprotein--sweet oil is similar, and the laudatory title of " east sweet oil " is arranged.In addition, tea-seed oil also contains abundant vitamin E, Serlabo and other inhibitor.Though the tea seed is a kind of high-quality grease resource with function well,, has not only damaged its nutrition and health care greatly and be worth, if production management is not good at also can causing the pollution of noxious such as benzopyrene to exceed standard owing to adopt traditional high temperature oil-producing technique.As squeeze when making oil, high for making oil yield, steam and fry temperature up to 120-130 ℃, can cause the destruction of active substance in the grease.Though low temperature (temperature of charge is not higher than 90 ℃) Technology in Pressing is just progressively paid attention to by the grease scientist; The chance that makes expressing process produce objectionable impurities and infringement healthy nutritive value greatly reduces; But owing to adopt high temperature depickling, deodorization in the refining process, not only operation is many, energy consumption is high; Also destroyed the active substance in the grease, produced be harmful to health healthy material such as trans acids etc., the advantage of low temperature pressing is exhausted.In order to realize that omnidistance low temperature prepares tea-seed oil, using the absorption refining is a good selection, but mostly the agent of existing absorption solid refined is silicon-dioxide, gac or both mixtures, receives great obstruction because of the cost height causes using.
Summary of the invention
Technical problem to be solved by this invention provides the method that a kind of low temperature with low cost prepares tea-seed oil; This method can make the omnidistance low temperature of realizing of tea-seed oil production process; Nutritive substance does not lose as much as possible in the processed oil thereby make, and objectionable impurities does not produce as much as possible.
Another technical problem to be solved by this invention provides a kind of low temperature that is used for and prepares activation rice hull ash of tea-seed oil and preparation method thereof.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: to the clean benevolence of tea seed or whole seed carry out modified, squeezing, filter, absorption refining, separating step; Said absorption refinement step is the solid refined agent with the activation rice hull ash, and this activation rice hull ash is made by the method that comprises the steps:
1) common rice hull ash was calcined 3 hours down in 600 ℃ of high temperature, be cooled to room temperature;
2) with the salt soak of 3mol/L 2 hours, wash then to water lotion pH greater than 6.5;
3) under 120 ℃ of conditions dry 4 hours.
The clean benevolence of said tea seed obtains through the tea seed being carried out drying, fragmentation, benevolence shell separating step.Preferably, said drying step carries out under normal pressure or vacuum condition, and temperature is not higher than 90 ℃, and dry back moisture content is 3-12%.
Said modified step temperature of charge is 30-90 ℃, and moisture is 8-12%.
Said squeezing step temperature of charge is not higher than 80 ℃.
The addition of said activation rice hull ash is the 0.5-5% of crude oil weight, and the absorption number of times is 1-3 time, and each adsorption time is 10-120 minute, and adsorption temp is not higher than 90 ℃.
Activation rice hull ash of the present invention prepares through following steps:
1) common rice hull ash was calcined 3 hours down in 600 ℃ of high temperature, be cooled to room temperature;
2) with the salt soak of 3mol/L 2 hours, wash then to water lotion pH greater than 6.5;
3) under 120 ℃ of conditions dry 4 hours, promptly get the activation rice hull ash.
The present invention passes through common rice hull ash high-temperature calcination; Can make unburn organic substance carbonization completely in the rice hull ash; Handle the structure that then can improve sorbent material on the one hand with soak, can make the activation of silicon hydroxyl on the other hand, increase its adsorptive power free fatty acids.After using activation rice hull ash absorption refining, acid value is up to state standards.Since the present invention from the tea seed obtain to the end refining oil temperature in steps be not higher than 90 ℃; Green, environmental protection and the low-carbon (LC) of omnidistance system oil tech have not only been realized with less cost; And, can not generate trans fatty acid and noxiouss such as propylene chlorohydrin, benzopyrene in the oil owing to avoid high temperature action.The present invention has also opened up a new direction for the rice hull ash utilization of resources of China's abundant.
Embodiment
Embodiment 1: the preparation of activation rice hull ash.1) common rice hull ash was calcined 3 hours down in 600 ℃ of high temperature, be cooled to room temperature; 2) with the salt soak of 3mo l/L 2 hours, washing was to neutral then; 3) under 120 ℃ of conditions dry 4 hours, promptly get the activation rice hull ash.
Embodiment 2: take by weighing quality tea seed 5kg preferably, under temperature is 90 ℃, condition of normal pressure, being dried to moisture content is 10%, carries out fragmentation after the cooling and separates with the benevolence shell; The clean benevolence that the shelling back obtains adjusts the temperature to 60 ℃, moisture to 10%; Be not higher than at temperature of charge under 80 ℃ the condition and squeeze; Squeezing crude oil (acid value is 2.6KOH mg/g) is through filtering the elimination solid impurity; The activation rice hull ash that adds 3wt% in the tea seed crude oil that obtains after the filtration, whip attachment 40 minutes, adsorption temp is controlled at 30 ℃; Absorption process is accomplished after-filtration and is removed spent sorbents, repeats to adsorb 1 time again, can obtain refining tea-seed oil (acid value is 0.65KOH mg/g); Trans acids, propylene chlorohydrin and benzopyrene all do not detect in the oil.
Embodiment 3: taking by weighing quality tea seed 5kg preferably, is 0.08MPa in vacuum tightness, and temperature is that to be dried to moisture content under 80 ℃ of conditions be 3%, carries out fragmentation after the cooling and separates with the benevolence shell; The clean benevolence that the shelling back obtains adjusts the temperature to 50 ℃, moisture to 9%; Be lower than at temperature of charge under 80 ℃ the condition and squeeze; Squeezing crude oil (acid value is 2.6KOH mg/g) is through filtering the elimination solid impurity; The activation rice hull ash that adds 2wt% in the tea seed crude oil that obtains after the filtration, whip attachment 30 minutes, adsorption temp is controlled at 50 ℃; Absorption process is accomplished after-filtration and is removed spent sorbents, repeats to adsorb 1 time again, can obtain refining tea-seed oil (acid value is 0.8KOH mg/g); Trans acids, propylene chlorohydrin and benzopyrene all do not detect in the oil.
Embodiment 4: take by weighing the measured tea seed 5kg of matter, adjust the temperature to 60 ℃, moisture to 10%; Be lower than whole seed squeezing under 80 ℃ the condition at temperature of charge; Squeezing crude oil (acid value is 1.3KOH mg/g) is through filtering the elimination solid impurity; The activation rice hull ash that adds 2wt% in the tea seed crude oil that obtains after the filtration, whip attachment 30 minutes, adsorption temp is controlled at 30 ℃; Absorption process completion after-filtration removes spent sorbents can obtain refining tea-seed oil (acid value is 0.7KOH mg/g); Trans acids, propylene chlorohydrin and benzopyrene all do not detect in the oil.
Embodiment 5: take by weighing the measured tea seed 5kg of matter, under temperature is 80 ℃, condition of normal pressure, being dried to moisture content is 12%, carries out fragmentation after the cooling and separates with the benevolence shell; The clean benevolence that the shelling back obtains adjusts the temperature to 80 ℃, moisture to 11%; Be lower than at temperature of charge under 80 ℃ the condition and squeeze; Squeezing crude oil (acid value is 1.3KOHmg/g) is through filtering the elimination solid impurity; The tea seed crude oil that obtains after the filtration adds the activation rice hull ash of 0.5wt%, whip attachment 100 minutes, and adsorption temp is controlled at 40 ℃; Absorption process is accomplished after-filtration and is removed spent sorbents, repeats to adsorb 2 times again, can obtain refining tea-seed oil (acid value is 0.65KOH mg/g); Trans acids, propylene chlorohydrin and benzopyrene all do not detect in the oil.
Embodiment 6: take by weighing old tea seed 5kg, adjust the temperature to 80 ℃, moisture to 9%; Be lower than whole seed squeezing under 80 ℃ the condition at temperature of charge; Squeezing crude oil (acid value is 4.3KOH mg/g) is through filtering the elimination solid impurity; The activation rice hull ash that adds 5wt% in the tea seed crude oil that obtains after the filtration, whip attachment 120 minutes, adsorption temp is controlled at 50 ℃; Absorption process is accomplished after-filtration and is removed spent sorbents, repeats to adsorb 1 time again, can obtain refining tea-seed oil (acid value is 0.85KOH mg/g); Trans acids, propylene chlorohydrin and benzopyrene all do not detect in the oil.
Embodiment 7: taking by weighing old tea seed 5kg, is 0.09MPa in vacuum tightness, and temperature is that to be dried to moisture content under 60 ℃ of conditions be 5%, carries out fragmentation after the cooling and separates with the benevolence shell; The clean benevolence that the shelling back obtains adjusts the temperature to 30 ℃, moisture to 10%; Be lower than at temperature of charge under 80 ℃ the condition and squeeze; Squeezing crude oil (acid value is 4.3KOH mg/g) is through filtering the elimination solid impurity; The activation rice hull ash that adds 4wt% in the tea seed crude oil that obtains after the filtration, whip attachment 80 minutes, adsorption temp is controlled at 30 ℃; Absorption process is accomplished after-filtration and is removed spent sorbents, repeats to adsorb 2 times again, can obtain refining tea-seed oil (acid value is 0.75KOH mg/g); Trans acids, propylene chlorohydrin and benzopyrene all do not detect in the oil.
Embodiment 8: taking by weighing old tea seed 5kg, is 0.06MPa in vacuum tightness, and temperature is that to be dried to moisture content under 90 ℃ of conditions be 4%, carries out fragmentation after the cooling and separates with the benevolence shell; The clean benevolence that the shelling back obtains adjusts the temperature to 50 ℃, moisture to 11%; Be lower than at temperature of charge under 80 ℃ the condition and squeeze; Squeezing crude oil (acid value is 4.3KOH mg/g) is through filtering the elimination solid impurity; The activation rice hull ash that adds 3wt% in the tea seed crude oil that obtains after the filtration, whip attachment 50 minutes, adsorption temp is controlled at 80 ℃; Absorption process is accomplished after-filtration and is removed spent sorbents, repeats to adsorb 2 times again, can obtain refining tea-seed oil (acid value is 0.95KOH mg/g); Trans acids, propylene chlorohydrin and benzopyrene all do not detect in the oil.
Embodiment 9: take by weighing tea seed 5kg, adjust the temperature to 60 ℃, moisture to 10%; Be lower than whole seed squeezing under 80 ℃ the condition at temperature of charge; Squeezing crude oil (acid value is 4.3KOH mg/g) is through filtering the elimination solid impurity; The activation rice hull ash that adds 2wt% in the tea seed crude oil that obtains after the filtration, whip attachment 30 minutes, adsorption temp is controlled at 80 ℃; Absorption process is accomplished after-filtration and is removed spent sorbents, repeats to adsorb 2 times again, can obtain refining tea-seed oil (acid value is 1.2KOH mg/g); Trans acids, propylene chlorohydrin and benzopyrene all do not detect in the oil.
Claims (10)
1. a low temperature prepares the method for tea-seed oil; Comprise to the clean benevolence of tea seed or whole seed carry out modified, squeezing, filter, absorption refining, separating step; It is characterized in that: said absorption refinement step is the solid refined agent with the activation rice hull ash, and this activation rice hull ash is made by the method that comprises the steps:
1) common rice hull ash was calcined 3 hours down in 600 ℃ of high temperature, be cooled to room temperature;
2) with the salt soak of 3mol/L 2 hours, wash then to water lotion pH greater than 6.5;
3) under 120 ℃ of conditions dry 4 hours.
2. low temperature as claimed in claim 1 prepares the method for tea-seed oil, it is characterized in that: the clean benevolence of said tea seed obtains through the tea seed being carried out drying, fragmentation, benevolence shell separating step.
3. low temperature as claimed in claim 2 prepares the method for tea-seed oil, it is characterized in that: said drying step carries out under normal pressure or vacuum condition, and temperature is not higher than 90 ℃, and dry back moisture content is 3-12%.
4. prepare the method for tea-seed oil like each described low temperature of claim 1-3, it is characterized in that: said modified step temperature of charge is 30-90 ℃, and moisture is 8-12%.
5. prepare the method for tea-seed oil like each described low temperature of claim 1-3, it is characterized in that: said squeezing step temperature of charge is not higher than 80 ℃.
6. the method for preparing tea-seed oil like each described low temperature of claim 1-3; It is characterized in that: the addition of said activation rice hull ash is the 0.5-5% of crude oil weight; The absorption number of times is 1-3 time, and each adsorption time is 10-120 minute, and adsorption temp is not higher than 90 ℃.
7. low temperature as claimed in claim 4 prepares the method for tea-seed oil, it is characterized in that: the addition of said activation rice hull ash is the 0.5-5% of crude oil weight, and the absorption number of times is 1-3 time, and each adsorption time is 10-120 minute, and adsorption temp is not higher than 90 ℃.
8. low temperature as claimed in claim 5 prepares the method for tea-seed oil, it is characterized in that: the addition of said activation rice hull ash is the 0.5-5% of crude oil weight, and the absorption number of times is 1-3 time, and each adsorption time is 10-120 minute, and adsorption temp is not higher than 90 ℃.
9. the preparation method of an activation rice hull ash is characterized in that: may further comprise the steps:
1) common rice hull ash was calcined 3 hours down in 600 ℃ of high temperature, be cooled to room temperature;
2) with the salt soak of 3mol/L 2 hours, wash then to water lotion pH greater than 6.5;
3) under 120 ℃ of conditions dry 4 hours, promptly get the activation rice hull ash.
10. the activation rice hull ash of the said method of claim 9 preparation.
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| CN 201210006801 CN102559379B (en) | 2012-01-10 | 2012-01-10 | Method for preparing tea seed oil at low temperature, activated rice hull ash for method, and preparation of activated rice hull ash |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666751A (en) * | 2013-10-18 | 2014-03-26 | 浙江佰帆果木种植有限公司 | Production method of squeezed green tea seed oil |
Citations (2)
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| CN101692854A (en) * | 2009-10-12 | 2010-04-14 | 华南农业大学 | Method for preparing edible safflower tea oil |
| CN101914413A (en) * | 2010-04-06 | 2010-12-15 | 福建师范大学 | Low-temperature refining method of tea seed oil |
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- 2012-01-10 CN CN 201210006801 patent/CN102559379B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692854A (en) * | 2009-10-12 | 2010-04-14 | 华南农业大学 | Method for preparing edible safflower tea oil |
| CN101914413A (en) * | 2010-04-06 | 2010-12-15 | 福建师范大学 | Low-temperature refining method of tea seed oil |
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| 卫延安 等: "提高稻壳灰制备活性炭、白炭黑质量的方法研究", 《郑州工程学院学报》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666751A (en) * | 2013-10-18 | 2014-03-26 | 浙江佰帆果木种植有限公司 | Production method of squeezed green tea seed oil |
| CN103666751B (en) * | 2013-10-18 | 2015-05-20 | 浙江佰帆果木种植有限公司 | Production method of squeezed green tea seed oil |
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