CN104212629A - Method for extracting linseed oil by cold pressing with salt-water wetting - Google Patents
Method for extracting linseed oil by cold pressing with salt-water wetting Download PDFInfo
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- CN104212629A CN104212629A CN201410473886.1A CN201410473886A CN104212629A CN 104212629 A CN104212629 A CN 104212629A CN 201410473886 A CN201410473886 A CN 201410473886A CN 104212629 A CN104212629 A CN 104212629A
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Abstract
The invention discloses a method for extracting linseed oil by cold pressing with salt-water wetting and belongs to the fields of food and food processing. The method comprises the following steps: naturally drying linseeds, adding salt water to stir and wet the linseeds, then carrying out low-temperature pressing, and centrifugating at high speed to obtain pure-natural linseed oil. The method disclosed by the invention is improved on the basis of the traditional method for extracting the linseed oil by cold pressing, and has the beneficial effects that the dry linseeds are wet by salt water, the tissue structures of membranes on the surfaces of the linseeds are changed, and then low-temperature pressing is carried out, so that not only is no damage to the original components well maintained, but also the oil yield of the linseed oil is greatly increased (increased by 29.44% compared with that of the traditional cold-pressing process), and the used amount of an organic solvent used in secondary oil removal of cake meal at the later period is reduced; and the reaction conditions are mild, the technical process is environmental-friendly and the method is easy for industrial production.
Description
Technical field
The present invention relates to a kind of method that cold press provides oleum lini, particularly relate to a kind of method that oleum lini is extracted in salt water-wet cold press, belong to food and manufacture field thereof.
Background technology
Flax, also known as flax, is flax family (Linaceae) annual herb plant, is one of large oil crops in the world ten.Primary growth is on the northwest of China, northeast, North China, the Inner Mongol and other places.In oleum lini, saturated fatty acid accounts for 8% ~ 10%, and monounsaturated fatty acids accounts for 18% ~ 23%, and linolic acid accounts for 12% ~ 16%, and alpha-linolenic acid accounts for 51% ~ 62%.Alpha-linolenic acid has vital role in the control, reduction blood cholesterol levels, enhancing body immunizing power etc. of cardiovascular disorder.
The method of current extraction oleum lini mainly contains milling process (comprising hot moulding and cold press), solvent extraction method, supercritical extraction and enzyme process, wherein supercritical extraction apparatus expensive, and extraction cost is high, and output is little.In solvent method product, residual solvent is unfavorable to HUMAN HEALTH, and the use of solvent must supporting corresponding antiknock device in addition, danger coefficient and cost high.Although enzyme process preparation is biological method, the price of enzyme is high, is unfavorable for suitability for industrialized production.Therefore, or milling process widely used by industrialization.Conventional thermocompression presses and gets oleum lini is propagandized hotly by linseed oil to more than 200 DEG C, and then extract oil while hot with ripe linseed oil, oil yield is high, but the oleum lini produced is muddy, and color and luster turns black, and unsaturated fatty acid content greatly reduces, and product quality is poor; And the oleum lini color and luster that cold-press extracts and brightness are better, and unsaturated fatty acids is not destroyed, but oil yield is lower, generally only has 28.20 %.
Summary of the invention
The object of the invention is, for adopting cold-press to extract the low problem of oleum lini oil yield in prior art, to provide a kind of salt water-wet cold press to extract the method for oleum lini, being intended to improve the oil yield that oleum lini is extracted in cold press.
The method of oleum lini is extracted in salt water-wet cold press of the present invention, is naturally dried by linseed oil, adds after saline soaks and carries out low temperature pressing again, high speed centrifugation, obtain pure natural linseed oil.
The salt solution added is the NaCl solution of concentration 5 ~ 20g/L; The add-on of salt solution is 8% ~ 15% of linseed source weight.
Described low temperature pressing technique is: adopt twin screw low-temperature oil expeller, oil expression temperature :-10 DEG C ~ 50 DEG C, screw speed: 40 ~ 50r/min, input speed 100 ~ 120kg/h.
Described ultracentrifugal rotating speed is 12000 ~ 20000r/min, and centrifuging temperature is 15 ~ 25 DEG C., be that linseed oil is dried naturally, add a certain proportion of salt water-wet, stir, low temperature pressing, high speed centrifugation, obtain pure natural linseed oil.After testing, under processing condition of the present invention, oleum lini is extracted in cold press, and oil yield can reach 36.50%, and more traditional cold pressing process improves 29.44%.
The pure natural linseed oil product of the present invention's squeezing is through Gansu Province's food quality supervision Inspection Research Spot detection, and the content of its oleic acid, linolic acid and other unsaturated fatty acids is in table 1:
The present invention improves on the basis that oleum lini is extracted in traditional cold press, by the dry linseed oil of salt water-wet, the weave construction of the film on linseed oil surface is changed, carry out low temperature pressing again, not only maintain original composition not well to be destroyed, and greatly improve the oil yield of oleum lini, decrease later stage grouts secondary and to deoil used consumption of organic solvent, its reaction conditions is gentle, and technical matters is green, be easy to carry out suitability for industrialized production.
Embodiment
Below by specific embodiment, the technique of salt water-wet cold press extraction oleum lini of the present invention and oil yield are described further.
embodiment 1
(1) choose 100 jin of full linseed oils, after naturally drying, add the NaCl aqueous solution (concentration is 20g/L) of 8 jin;
(2) linseed oil mixed is dropped into twin-screw oil mill to squeeze.Control screw speed is 40r/min, and pressing temperature is 20 DEG C, and input speed is 100kg/h;
(3) gained crude oil supercentrifuge is separated, and controls centrifuging temperature 20 DEG C, rotating speed 15000 revs/min.Obtaining pure natural linseed oil seed kernel oil is 35.20 jin.Oil yield is 35.20%, and the indices of oil product is in table 1.
embodiment 2
(1) choose 100 jin of full linseed oils, after naturally drying, add the NaCl aqueous solution (concentration is 5g/L) of 15 jin;
(2) linseed oil mixed is dropped into twin-screw oil mill to press.Control screw speed is 50r/min, and pressing temperature is 50 DEG C, and input speed is 120kg/h;
(3) gained crude oil supercentrifuge is separated, and control centrifuging temperature 15 DEG C, rotating speed is 20000 revs/min.Obtaining pure natural linseed oil is 34.90 jin.Oil yield is 34.90%, and the indices of oil product is in table 1.
embodiment 3
(1) choose 100 jin of full linseed oils, after naturally drying, add the NaCl aqueous solution (concentration is 15g/L) of 10 jin;
(2) linseed oil mixed is dropped into twin-screw oil mill machine to squeeze.Control screw speed is 45r/min, and pressing temperature is 25 DEG C, input speed 110kg/h;
(3) gained crude oil supercentrifuge is separated, and control centrifuging temperature 25 DEG C, rotating speed is 15000 revs/min.Obtaining pure natural linseed oil seed kernel oil is 36.50 jin.Oil yield is 36.50%, and the indices of oil product is in table 1.
Claims (5)
1. a method for oleum lini is extracted in salt water-wet cold press, is naturally dried by linseed oil, adds after saline soaks and carries out low temperature pressing again, high speed centrifugation, obtain pure natural linseed oil.
2. the method for oleum lini is extracted in salt water-wet cold press as claimed in claim 1, it is characterized in that: the salt solution added is the NaCl solution of concentration 5 ~ 20g/L.
3. the method for oleum lini is extracted in salt water-wet cold press as claimed in claim 2, it is characterized in that: the add-on of salt solution is 8% ~ 15% of linseed source weight.
4. as described in claims 1 to 3, the method for oleum lini is extracted in any one salt water-wet cold press, it is characterized in that: described low temperature pressing technique is: adopt twin screw low-temperature oil expeller, oil expression temperature :-10 DEG C ~ 50 DEG C, screw speed: 40 ~ 50r/min, input speed 100 ~ 120kg/h.
5. as described in claims 1 to 3, the method for oleum lini is extracted in salt water-wet cold press, and it is characterized in that: described ultracentrifugal rotating speed is 12000 ~ 20000r/min, centrifuging temperature is 15 ~ 25 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410473886.1A CN104212629A (en) | 2014-09-17 | 2014-09-17 | Method for extracting linseed oil by cold pressing with salt-water wetting |
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| CN201410473886.1A CN104212629A (en) | 2014-09-17 | 2014-09-17 | Method for extracting linseed oil by cold pressing with salt-water wetting |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106010769A (en) * | 2016-07-13 | 2016-10-12 | 甘肃长清生物科技有限责任公司 | Production method for hot pressed linseed oil |
| CN106433952A (en) * | 2016-10-24 | 2017-02-22 | 宁夏马季清真食用油有限公司 | Cold pressing production method for linseed oil |
| CN107087689A (en) * | 2017-04-27 | 2017-08-25 | 安徽华宇调味食品有限公司 | A kind of sesame oil with health-care efficacy and preparation method thereof |
| CN107509822A (en) * | 2017-08-25 | 2017-12-26 | 山东鲁派国际食品有限公司 | A kind of special edible oil of pregnant woman and preparation method thereof |
| CN108587777A (en) * | 2018-01-25 | 2018-09-28 | 杨凌飘香食用油脂有限公司 | A kind of preparation method and application of three white melon melon seeds oil |
| CN109852467A (en) * | 2019-01-07 | 2019-06-07 | 宁夏马季食用油有限公司 | A kind of cold pressing process of compound siritch |
| CN110583798A (en) * | 2019-09-29 | 2019-12-20 | 山东兴泉油脂有限公司 | Production method of refined corn oil with strong aroma |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106010769A (en) * | 2016-07-13 | 2016-10-12 | 甘肃长清生物科技有限责任公司 | Production method for hot pressed linseed oil |
| CN106433952A (en) * | 2016-10-24 | 2017-02-22 | 宁夏马季清真食用油有限公司 | Cold pressing production method for linseed oil |
| CN107087689A (en) * | 2017-04-27 | 2017-08-25 | 安徽华宇调味食品有限公司 | A kind of sesame oil with health-care efficacy and preparation method thereof |
| CN107509822A (en) * | 2017-08-25 | 2017-12-26 | 山东鲁派国际食品有限公司 | A kind of special edible oil of pregnant woman and preparation method thereof |
| CN108587777A (en) * | 2018-01-25 | 2018-09-28 | 杨凌飘香食用油脂有限公司 | A kind of preparation method and application of three white melon melon seeds oil |
| CN109852467A (en) * | 2019-01-07 | 2019-06-07 | 宁夏马季食用油有限公司 | A kind of cold pressing process of compound siritch |
| CN110583798A (en) * | 2019-09-29 | 2019-12-20 | 山东兴泉油脂有限公司 | Production method of refined corn oil with strong aroma |
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