Dab tsi yog cov yam ntxwv ntawm cov khoom siv supercritical extraction?
Cov kua dej supercritical yog cov kua supercritical, uas yog lub xeev roj thiab kua uas tsis yog roj thiab tsis muaj kua. Cov khoom siv no tsuas tuaj yeem muaj nyob thaum nws qhov kub thiab siab dhau ntawm qhov chaw tseem ceeb. Cov kua dej ua rau lub ntsej muag muaj qhov siab dua, zoo ib yam li cov kua, thiab nws cov viscosity tau ze dua ntawm cov roj. Cov cuab yeej tshwj xeeb tshaj tawm cov khoom tsim hluav taws xob coj koj paub ntau ntxiv!
Qhov sib ntxiv ntawm ib qho me me ntawm lwm cov kuab tshuaj rau cov kua dej ua kom zoo dua kuj hloov nws lub peev xwm zom cov solute. Nws cov tshuab ntawm kev txiav txim tseem tsis tau to taub tag nrho. Feem ntau ntxiv rau hauv qhov nyiaj uas tsis ntau tshaj 10%, thiab feem ntau ntawm cov duab tshav ntuj hnyav methanol, isopropyl cawv thiab lwm yam.
Cov peev txheej ua tau zoo tuaj yeem muab tshem tawm ze chav sov (35 ~ 40 ° C) thiab lub hnab roj CO2, zoo tiv thaiv oxidation thiab dissipation ntawm tshav kub rhiab tshuaj.
Cov yam ntxwv ntawm supercritical CO2 rho tawm txiav txim siab nws ntau yam kev thov. Piv txwv li, hauv kev lag luam kws tshuaj, nws tuaj yeem siv rau kev rho tawm ntawm cov khoom xyaw nquag ntawm Suav tshuaj ntsuab, kev ua kom huv ntawm cov khoom cua sov ua kom sov, thiab sib cais ntawm lipid sib tov; hauv kev lag luam khoom noj khoom haus, nthuav tawm hops, rho tawm ntawm cov pigments, thiab cov zoo li.
Cov tshuaj sib xyaw ua ke ntawm cov nroj tsuag tshuaj muaj tswj nyob rau hauv qhov muab rho tawm, thiab lub siab npau npau, tsis tshua muaj siab, thiab cov tshuaj pyrolyzable tuaj yeem tawm ntawm qhov kub thiab txias qis dua nws qhov taw tes kub.
Cov kev rho tawm thiab cov sib cais tau muab sib xyaw ua ke rau ib qho. Thaum cov roj nyeem yaj tag CO2 nkag rau hauv lub tshuab hluav taws xob cais, CO2 thiab cov kua roj sai sai ua ob theem (kua roj-kua sib cais) vim tias lub siab poob lossis hloov qhov kub thiab txias, thiab tau sib cais tam sim ntawd, tsis tsuas yog muaj ntau qhov kev ua haujlwm siab thiab qis zog siv zog tsim khoom thiab txo nqi.
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