Piv nrog rau cov kuab tshuaj zoo tib yam extraction, lub supercritical CO2 extraction ntawm tshuaj yej roj muaj cov yam ntxwv hauv qab no:
(1) Nws tuaj yeem muab rho tawm ntawm qhov kub ntawm chav tsev kub (35-40 degree) thiab nyob rau hauv lub hau npog ntawm CO2 roj, tiv thaiv oxidation thiab khiav tawm ntawm cov khoom kub-rhiab heev. Yog li ntawd, feem ntau ntawm cov as-ham nyob rau hauv cov tshuaj yej noob yog khaws cia nyob rau hauv lub extract, thiab cov khoom uas muaj boiling point, tsis tshua muaj volatility thiab yooj yim pyrolysis tau muab rho tawm hauv qab lawv boiling point.
(2) Extracting tshuaj yej roj nrog supercritical carbon dioxide yog txoj kev huv tshaj extraction. Txij li thaum tsis muaj cov kuab tshuaj organic siv nyob rau hauv tag nrho cov txheej txheem, tsis muaj residual hnyav nyob rau hauv lub extract. Nyob rau tib lub sijhawm, cov txheej txheem rho tawm kuj tseem tiv thaiv kev toxicity rau tib neeg lub cev thiab cov pa phem rau ib puag ncig. Nws yog 100% natural processing txheej txheem.
(3) Kev rho tawm thiab kev sib cais yog sib xyaw ua ke. Thaum cov saturated solute CO2-SCF ntws los ntawm lub separator, lub siab poob, ua rau CO2 thiab cov extract tau sai sai ua ob theem (gas-kua sib cais) thiab cais tam sim ntawd. Tsis tsuas yog cov extraction efficiency siab, tab sis nws kuj siv tsawg zog thiab txuag nqi.
(4) CO2 yog cov roj tsis muaj zog. Tsis muaj tshuaj lom neeg cov tshuaj tiv thaiv thaum lub sij hawm extraction txheej txheem. Nws yog cov roj uas tsis muaj hluav taws kub, tsis qab, tsis muaj ntxhiab, thiab tsis muaj tshuaj lom, yog li nws muaj kev nyab xeeb.
(5) CO2 pheej yig, siab purity, yooj yim kom tau, thiab tuaj yeem rov ua dua tshiab hauv cov txheej txheem tsim khoom, yog li txo cov nqi.
(6) Ob lub siab thiab qhov kub thiab txias tuaj yeem siv los ua qhov ntsuas los kho cov txheej txheem rho tawm. Lub hom phiaj ntawm kev rho tawm yog ua tiav los ntawm kev hloov qhov kub thiab txias. Thaum lub siab ruaj khov, hloov qhov kub tuaj yeem cais cov khoom; conversely, thaum qhov kub thiab txias, txo lub siab tuaj yeem cais cov extract. Yog li ntawd, cov txheej txheem yog yooj yim thiab yooj yim rau tus tswv, thiab cov extraction ceev yog ceev.