A kind of extraction process of tangerine essential oil
Technical field
The present invention relates to a kind of extraction process of tangerine essential oil.
Background technology
Peel of Citrus reticulata Blanco mainly comprises fruit peel such as mandarin orange, tangerine, orange, lemon, shaddock, bitter orange, all includes high-grade spices essential oil.Natural composition has terpenes, aldehyde, ketone, alcohol, ester, acids etc. tens to hundreds of in this kind volatile oil.Volatile oil is widely used: can be applicable to refreshment drink, candy, biscuit, dessert, ice-creams, and Gulong perfume, toothpaste essence and household cleaners of day chemical industry or the like; Tangerine oil still is the clean-out system of printed circuit board (PCB) or the raw material of the anhydrous clean-out system of other high-quality.The different contained chemical ingredientss of its essential oil of oranges and tangerines kind have nothing in common with each other, and divide by the oranges and tangerines kind, and citrus essential oil has lemon oil, sweet orange oil, tangerine oil or the like.By the method branch that extracts, the title of producing with distillation method " deep fat " is called " cold oil " with what the press for extracting juice method was produced.Usually the method for extracting volatile oil from orange peel has milling process, steam distillation.Citrus essential oil is the fruit essential oil that contains a large amount of monoterpenes, owing to the temperature of steam distillation is higher, easily produces the rotten and reduction essential oil quality of polymerization, so the less use of steam distillation.A large amount of industrial production often adopts the press for extracting juice mill method under the room temperature, at room temperature promptly, the citrusfruit pericarp is galled or peel oil is squeezed, but these methods is applicable to pachydermia class oranges and tangerines such as orange, lemon, and be not suitable for thin skin class oranges and tangerines.For example FMC technology, the described extracting method of Brown technology, its main principle is that citrus fruits was rubbed to pericarp before press juice, uses water wash; The way of FMC and the friction of Brown process using is with the skin galling on citrus fruits surface, and therefore water spray only is applicable to orange simultaneously, is not suitable for wide skin tangerine; Only can be used for being the orange of whole fruit form in addition, can not be used for the orange after the peeling.And in China, the oranges and tangerines outlet of the overwhelming majority is to make can after the peeling, and peel of Citrus reticulata Blanco is only as a kind of accessory products; How to make full use of these peel of Citrus reticulata Blanco, bringing into play its maximum use value is the problem that is worth us to explore.
Summary of the invention
At the deficiencies in the prior art part, the invention provides that a kind of technology is simple, cost is low, can be applicable to pachydermia and thin skin class oranges and tangerines simultaneously, and the tangerine essential oil extraction process that can produce high-quality essential oil.
The present invention is to realize by such technical scheme: a kind of extraction process of tangerine essential oil is provided, may further comprise the steps successively for reaching above purpose:
1), choose the fresh pericarp of citrus fruit, remove the white cortex of the thickness of pericarp internal layer greater than 0.5mm;
2), the pericarp behind the white cortex of above-mentioned removal is squeezed spray high pressure water in the time of squeezing; Can obtain by an oil-water mixture and a fruit mixture of forming;
3), use separating centrifuge to separate said mixture, remove the fruit grain, obtain oil-water mixture; Separation factor is 560~580;
4), use disk centrifugal separator to separate above-mentioned oil-water mixture, remove water, obtain oil; Separation factor is 9000~11000;
5), above-mentioned oil is carried out the dewax step.
The present invention also provides the extraction process of the another kind of tangerine essential oil under the same inventive concept, may further comprise the steps successively:
1), choose the fresh pericarp of citrus fruit, the white cortex of described pericarp internal layer is less than or equal to 0.5mm;
2), above-mentioned pericarp is squeezed spray high pressure water in the time of squeezing; Can obtain by an oil-water mixture and a fruit mixture of forming;
3), use separating centrifuge to separate said mixture, remove the fruit grain, obtain oil-water mixture; Separation factor is 560~580;
4), use disk centrifugal separator to separate above-mentioned oil-water mixture, remove water, obtain oil; Separation factor is 9000~11000;
5), above-mentioned oil is carried out the dewax step.
A kind of improvement as tangerine essential oil extraction process of the present invention: step 2) use three rod cane milles to squeeze.
Further improvement as tangerine essential oil extraction process of the present invention: disk centrifugal separator is special-purpose mandarin oil separating machine.
Further improvement as tangerine essential oil extraction process of the present invention: citrus fruit is mandarin orange class, tangerine class, orange class, shaddock class, lemon class, high orange class or mixed citrus fruit.
Tangerine essential oil extraction process of the present invention, technology is simple, easy and simple to handle, production cost is low; Made essential oil product is pure, and natural fragrance is less undermined.Tangerine essential oil extraction process of the present invention is compared with existing milling process, can be from peel of Citrus reticulata Blanco direct disposable extraction essential oil, do not need pericarp is carried out the lime hardening treatment in advance; Therefore keep the fragrance of essential oil preferably, can also simplify production technique.With distillation method method mutually, need not heat, fragrance improves significantly.Compare with Brown technology with FMC, can be applicable to pachydermia and thin skin class oranges and tangerines simultaneously.Tangerine essential oil extraction process of the present invention is fit to China's actual conditions very much, can at utmost bring into play as oranges and tangerines canned by product---the use value of peel of Citrus reticulata Blanco.
Embodiment
The extraction process of embodiment 1, a kind of tangerine essential oil is characterized in that this method is:
1), chooses the fresh pericarp of citrus fruit, as the fresh pericarp of orange class, shaddock class, lemon class, high orange class or other mixed citrus fruit; As the white skin thickness≤0.5mm of pericarp internal layer, show that this is a thin skin type citrus fruit, for example mandarin orange class, tangerine class can directly be selected for use; White skin thickness when the pericarp internal layer〉0.5mm, show that this is a pachydermia type citrus fruit, for example orange class, shaddock class, lemon class, high orange class or other mixed citrus, available barker is separated into white cortex and Calusena lansium layer with pericarp, removes white cortex, selects the Calusena lansium layer for use.Because if white cortex is blocked up, will when following squeezing, absorbs the oil content that extrudes, thereby reduce the yield of final essential oil.
2), with the pericarp of above-mentioned thin skin type citrus fruit or the Calusena lansium layer of pachydermia type citrus fruit, use the three rod cane milles of using in the present sugar industry to squeeze.Spacing between three nip rolls of this squeezing machine is adjusted to minimum distance, and the oil vacuole in the orange peel of as far as possible crushing discharges skin oil from oil vacuole; Spray high pressure water in the time of squeezing; The exit of squeezing machine can obtain by an oil-water mixture and a fruit mixture of forming;
3), said mixture is separated, purpose is in order to remove the fruit grain, to obtain oil-water mixture.Can adopt following two kinds of methods to separate.One, adopting sieve diameter earlier is the vibratory screening apparatus of 1mm, and then adopting sieve diameter is the plansifter of 0.2mm, removes the fruit grain successively, obtains oil-water mixture; Two, directly adopting separation factor is 560~580 centrifugal separator, and for example slurry slag separator separates and removes the fruit grain of diameter more than 0.02mm, obtains oil-water mixture.
4), above-mentioned oil-water mixture is put into a separation factor is 9000~11000 disk centrifugal separator, for example special-purpose mandarin oil separating machine separates, and removes water, obtains oil;
5), above-mentioned oil put into-18 ℃ of freezers preserve, remove the wax of peel oil simultaneously, can obtain pure peel of Citrus reticulata Blanco oil.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.