CN1757705A - Method for extracting wheat germ oil by using microwave and solvent - Google Patents
Method for extracting wheat germ oil by using microwave and solvent Download PDFInfo
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- CN1757705A CN1757705A CN 200510036855 CN200510036855A CN1757705A CN 1757705 A CN1757705 A CN 1757705A CN 200510036855 CN200510036855 CN 200510036855 CN 200510036855 A CN200510036855 A CN 200510036855A CN 1757705 A CN1757705 A CN 1757705A
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Abstract
A process for extracting the plumular oil of wheat grain includes such steps as proportionally mixing the germinal buds of wheat with solvent, immersing for 10-20 min, microwave extracting for 10-40 min, cooling, filtering, collecting filtrate, rotational distilling for removing solvent, centrifugal separation to obtain supernatant, and vacuum concentrating. Its advantages are low-temp extraction and no damage to active components.
Description
Technical field
The present invention relates to the separation and Extraction field that new technology is used for the natural product activeconstituents.It specifically is method with microwave and solvent extraction wheatgerm oil.
Background technology
The byproduct that wheatgerm produces when being the wheat abrasive dust, its main component is: crude fat is lower than 10%, and crude protein is higher than 30%, moisture 5-12%, ash content 4%.The composition of wheatgerm oil is mainly: sweet three fat 57%, and polarity fat (free fatty acids, sterol, a sweet fat, sweet two fat) 17.8%, phospholipid, glycolipid matter 16.5%, other are 3.7% years old.Wheatgerm oil contains 80% unsaturated fatty acids, and wherein linoleic acid content is higher than 50%, oleic acid 12%-28%; The contained tocopherol amount of wheatgerm oil (VE) is far above other plant oil, and content is 133-1000mg/100g oil, and it has effects such as anti-oxidant, reducing human organ aging; Wheatgerm oil also contains 23,25,26, two oleyl alcohols, and these higher alcoholss reduce blood cholesterol to improving the human chitinase utilization, alleviate muscle fatigue pain, and strengthening explosive power and endurance etc. has certain effect.
Produce wheatgerm oil at present both at home and abroad and mainly contain three kinds of methods: 1, supercritical carbon dioxide extraction method, pairing quality product is more excellent, extraction yield higher (6-9%).But its processing requirement high pressure and low temperature, the extraction time is about 5 hours, the facility investment costliness, thereby equipment cost and running cost are all higher; 2, solvent-extraction process, its extraction time is grown (1-16h), and the crude oil of proposition also needs to handle, thereby technology is complicated, and corresponding quality and productive rate are not high yet; 3, the milling process Technology is less demanding, also is easy to scale operation.But productive rate is not high, generally has only 5%, makes that in the squeezing of comparatively high temps (85 ℃-95 ℃) situation the activeconstituents in the wheatgerm oil is destroyed.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of method with microwave and solvent extraction wheatgerm oil is provided, utilize the selectivity of microwave action, lower temperature and short extraction time, avoided the stripping of other impurity in the wheatgerm, obtain comparatively purified oil product, also preserved activeconstituents wherein simultaneously effectively.The present invention is simple, the extraction yield height, and cost is lower.
Method with microwave and solvent extraction wheatgerm oil of the present invention comprises the steps:
(1) wheatgerm and solvent are by weight 1: 2-6 mixes, and wheatgerm was soaked in solvent 10-20 minute;
(2) the mixture 10-40min that obtains with Microwave Extraction Equipment treatment step (1);
(3) cool to room temperature, filtering and collecting filter liquid;
(4) the filtrate rotary distillation that obtains of step (3) removes solvent, the thick concentrated solution centrifugation that obtains, filter residue removes, and gets supernatant liquor, further is evaporated to solvent-free outflow, wheatgerm oil.
In the step (1), the preferred hexane of described solvent, sherwood oil, methylene dichloride or ether.
In the step (2), the microwave treatment top condition is to handle under rotating speed 300-800r/min, temperature 30-60 ℃, microwave irradiation intensity 300-800W condition.
In the step (3), can also use the solvent identical to wash the filter residue that obtains after Polyester filters, filter merging filtrate then with step (1).
The present invention compared with prior art has following advantage:
(1) applied microwave technology, make the leaching process time short, extraction yield is high, more selective and appointed condition is less demanding, thereby reduce equipment cost and extraction cost effectively;
(2) the present invention carries out the solvent extraction of carrying out under the microwave irradiation under lower temperature, thereby has effectively preserved the active effective constituent in the wheatgerm oil, has improved the quality of wheatgerm oil;
(3) the present invention is simple in extraction procedure, is easy to suitability for industrialized production.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
The first step: the ratio of wheatgerm and solvent is 1: 2, and solvent can adopt hexane;
Second step: at first the soaked in solvent wheatgerm is 10 minutes;
The 3rd step: adjust the Microwave Extraction Equipment parameter and begin and extract: 60 ℃ of the rotating speed 800r/min temperature of whipping appts; Microwave irradiation intensity 800W; Extraction time 40min;
The 4th step: extract the back system and cool to room temperature, filtering and collecting filter liquid; Wash Polyester filter residue secondary with hexane, filter then, merge above filtrate;
The 5th step: rotary distillation, remove most of solvent, get thick concentrated solution;
The 6th step: thick concentrated solution centrifugation, filter residue removes, and gets supernatant liquor;
The 7th step: supernatant liquor further is evaporated to solvent-free outflow, gets product.
The yield that above method is extracted wheatgerm oil is 10%.
Embodiment 2:
The first step: the ratio of wheatgerm and solvent is 1: 6, and solvent can adopt methylene dichloride;
Second step: at first the soaked in solvent wheatgerm is 20 minutes;
The 3rd step: adjust the Microwave Extraction Equipment parameter and begin and extract: the rotating speed 500r/min of whipping appts; 40 ℃ of temperature; Microwave irradiation intensity 500W; Extraction time 20min;
The 4th step: cool to room temperature after the extraction, filtering and collecting filter liquid; Wash Polyester filter residue secondary with methylene dichloride, filter then, merge above filtrate;
The 5th step: rotary distillation, remove most of solvent, get thick concentrated solution;
The 6th step: thick concentrated solution centrifugation, filter residue removes, and gets supernatant liquor;
The 7th step: supernatant liquor further is evaporated to solvent-free outflow, gets product.
The yield that above method is extracted wheatgerm oil is 9.2%.
Embodiment 3:
The first step: the ratio of wheatgerm and solvent is 1: 3, and solvent adopts ether;
Second step: at first the soaked in solvent wheatgerm is 20 minutes;
The 3rd step: adjust the Microwave Extraction Equipment parameter and begin and extract: the rotating speed 300r/min of whipping appts; 30 ℃ of temperature; Microwave irradiation intensity 300W; Extraction time 20min;
The 4th step: cool to room temperature after the extraction, filtering and collecting filter liquid; Wash Polyester filter residue secondary with ether, filter then, merge above filtrate;
The 5th step: rotary distillation, remove most of solvent, get thick concentrated solution;
The 6th step: thick concentrated solution centrifugation, filter residue removes, and gets supernatant liquor;
The 7th step: supernatant liquor further is evaporated to solvent-free outflow, gets product.
The yield that above method is extracted wheatgerm oil is 9.7%.
Following every detection index of the wheatgerm oil that extracts for optimised process:
Content of vitamin E (%) 0.77
Acid value (mgKOH/g) 14.2
Peroxide value (%) 0.026
Iodine number (ml) 122.7
Saponification value (ml) 176.6
The relative content table of series fatty acid in the wheatgerm oil:
Component content %
TETRADECONIC ACID 0.07
Palmitic acid 17.45
16 carbon-olefin(e) acid 0.19
Stearic acid 0.64
Oleic acid 15.61
Linolic acid 56.38
Linolenic acid 7.84
20 acid 0.18
21 carbon-olefin(e) acid 1.66
Detection method GC/MS area normalization method
Claims (4)
1, a kind of method with microwave and solvent extraction wheatgerm oil is characterized in that comprising the steps:
(1) wheatgerm and solvent are by weight 1: 2-6 mixes, and wheatgerm was soaked in solvent 10-20 minute;
(2) the mixture 10-40min that obtains with Microwave Extraction Equipment treatment step (1);
(3) cool to room temperature, filtering and collecting filter liquid;
(4) the filtrate rotary distillation that obtains of step (3) removes solvent, the thick concentrated solution centrifugation that obtains, filter residue removes, and gets supernatant liquor, further is evaporated to solvent-free outflow, wheatgerm oil.
2, method according to claim 1 is characterized in that in the step (1), described solvent is hexane, sherwood oil, methylene dichloride or ether.
3, method according to claim 1 and 2 is characterized in that in the step (2), carries out microwave treatment under rotating speed 300-800r/min, temperature 30-60 ℃, microwave irradiation intensity 300-800W condition.
4, method according to claim 3 is characterized in that in the step (3), uses the solvent identical with step (1) to wash the filter residue that obtains after Polyester filters, and filters merging filtrate then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510036855 CN1757705A (en) | 2005-08-30 | 2005-08-30 | Method for extracting wheat germ oil by using microwave and solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510036855 CN1757705A (en) | 2005-08-30 | 2005-08-30 | Method for extracting wheat germ oil by using microwave and solvent |
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| Publication Number | Publication Date |
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| CN1757705A true CN1757705A (en) | 2006-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510036855 Pending CN1757705A (en) | 2005-08-30 | 2005-08-30 | Method for extracting wheat germ oil by using microwave and solvent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831349A (en) * | 2010-04-13 | 2010-09-15 | 山东轻工业学院 | Method for extracting wheat-germ oil continuously by using microwave secondary solvent |
| CN101601461B (en) * | 2009-07-16 | 2012-02-22 | 广州大学 | Extraction method of fresh chive oil |
| CN108913335A (en) * | 2018-07-03 | 2018-11-30 | 广州萃取生物科技有限公司 | A kind of method of extracting wheat-germ oil continuously by using microwave secondary solvent |
-
2005
- 2005-08-30 CN CN 200510036855 patent/CN1757705A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101601461B (en) * | 2009-07-16 | 2012-02-22 | 广州大学 | Extraction method of fresh chive oil |
| CN101831349A (en) * | 2010-04-13 | 2010-09-15 | 山东轻工业学院 | Method for extracting wheat-germ oil continuously by using microwave secondary solvent |
| CN108913335A (en) * | 2018-07-03 | 2018-11-30 | 广州萃取生物科技有限公司 | A kind of method of extracting wheat-germ oil continuously by using microwave secondary solvent |
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