Technical Principple: Selective Dissolution nyob rau hauv lub Supercritical State
Thaum cov pa roj carbon dioxide khaws cia siab tshaj nws qhov tseem ceeb- nrog qhov kub siab tshaj 31.1℃thiab siab tshaj 7.38 MPa- nws nkag mus rau hauv lub xeev supercritical kua. Cov theem tshwj xeeb no sib xyaw ua ke ntawm kev nkag mus ntawm cov roj nrog lub zog daws ntawm cov kua, tso cai rau nws nkag mus tob rau hauv cov txheej txheem ntawm tes thiab xaiv cov yaj uas tsis tshua muaj -molecular- hnyav cov tshuaj tsw qab xws li terpenes, aromatic esters, thiab phenols. Nyob rau hauv sib piv, nws tseem inert rau macromolecular impurities xws li cov proteins thiab polysaccharides. Thoob plaws hauv cov txheej txheem, carbon dioxide tsuas yog ua ib qho nruab nrab ntawm lub cev thiab tsis muaj tshuaj lom neeg, yog li khaws cia lub ntuj ncaj ncees ntawm cov tshuaj tsw qab.
Cov pa roj carbon dioxide nws tus kheej ua tau raws li cov zaub mov- cov qauv kev nyab xeeb qib thiab cov khoom pov thawj suav nrog cov tshuaj tsis muaj zog, tsis yog -flammable, thiab tsis yog - tawg. Nyob rau hauv lub kaw - lub voj kaw lus, nws tus nqi rov qab tuaj yeem tshaj 95%, ua tiav xoom cov kuab tshuaj seem hauv cov txheej txheem tsim khoom thiab ua tau raws li qhov xav tau kev nyab xeeb siab tshaj plaws rau cov khoom siv raw hauv kev lag luam tshuaj, zaub mov, thiab tshuaj pleev ib ce.
Txheem Txheej Txheem Flow
1. Raw Material Pretreatment
Cov ntaub ntawv nyoos yog ntxuav, qhuav ntawm qhov kub thiab txias, thiab ces crushed mus rau ib tug particle loj ntawm 40-60 mesh. Kev crushing kom zoo cuam tshuam cov nroj tsuag ntawm cov phab ntsa ntawm phab ntsa thiab tsim kom muaj kev hloov pauv loj. Piv txwv li, crushing clove buds tsub kom tus nqi raug ntawm lawv cov qog nqaij hlav roj los ntawm kwv yees li 70%, txo cov sij hawm tom qab rho tawm.
2. Supercritical Phase Transformation
Cov pa roj carbon dioxide kua yog pressurized los ntawm lub siab - lub twj tso kua mis siab thiab precisely kub- tswj siv lub tshav kub exchanger los ua ib tug ruaj khov supercritical kua theem nyob rau hauv lub extraction nkoj. Lub kaw lus siv PID tswj qhov kev txwv tsis pub muaj qhov hloov pauv mus rau hauv ± 0.5℃thiab ± 0.2 MPa, muab lub sijhawm ruaj khov rau kev rho tawm kom zoo.
3. Dynamic Circulation Extraction
Cov kua dej supercritical circulates los ntawm raw cov ntaub ntawv txaj ntawm tus nqi ntawm 3-5 L / min, ua nruam extraction rau 1-3 teev nyob rau hauv me me mob (35-55℃thiab 10-30 MPa). Thaum lub sij hawm no, qhov system siab yog tswj los ntawm lub nraub qaum - lub siab valve, thaum lub concentration ntawm outflow yog soj ntsuam nyob rau hauv lub sij hawm tiag tiag txiav txim kom meej lub extraction kawg point.
4. Fractional Separation thiab nruab nrab rov qab
Cov kua dej uas muaj lub hom phiaj cov khoom nkag mus rau hauv ob- theem sib cais lub nkoj, qhov twg cov khoom sib txawv ntawm cov polarities yog precipitated stepwise los ntawm gradient siab txo. Cov pa roj carbon dioxide sib cais yog condensed thiab liquefied ua ntej xa rov qab mus rau lub tank cia, ua kom tiav lub voj voog nruab nrab. Qhov ib zaug - voj voog poob tus nqi nyob rau hauv ib txwm muaj- cov cuab yeej ntsuas yog tsawg dua 3%.
Daim ntawv thov muaj nqis
Cov thev naus laus zis no muab cov txiaj ntsig tseem ceeb hauv thaj chaw ntawm cov tshuaj tsw qab ntuj: Rau cua sov- cov tshuaj tsw qab rhiab heev (xws li, jasmine absolute thiab tuberose pob zeb), qhov khaws cia ntawm cov tshuaj tsw qab yog ntau dua 40% siab dua qhov ua tiav los ntawm cov txheej txheem distillation. Nyob rau hauv cov nqe lus ntawm kev xaiv extraction, lub hom phiaj enrichment ntawm tej yam yuav tsum tau paub los ntawm kev kho siab thiab kub tsis. Tag nrho cov txheej txheem tsim khoom ua raws li cov qauv tshuaj ntsuab ntsuab thiab ua kom tsis muaj dej khib nyiab lossis tso pa tawm.
Nrog rau cov neeg siv khoom xav tau ntau ntxiv rau cov khoom "dawb daim ntawv lo", supercritical carbon dioxide extraction technology tau nthuav dav los ntawm siab -kawg daim ntawv thov mus rau cov khw muag khoom loj. Cov thev naus laus zis no tsis yog tsuas yog ua kom lub cev muaj zog thiab cov qauv kev nyab xeeb ntawm cov khoom siv tshuaj tsw qab tab sis kuj muab cov chaw tsim khoom nrog cov kev daws teeb meem uas sib npaug ntawm kev lag luam thiab kev ruaj ntseg ib puag ncig- sawv cev rau yav tom ntej kev taw qhia ntawm cov khoom siv hluav taws xob extraction technology.