Kuv Yuav Paub Li Cas Distillation Yuav Siv
Oct 19, 2023
Tso lus
Xaiv cov txheej txheem distillation tsim nyog nyob ntawm ntau yam, suav nrog hom kev sib xyaw thiab cov ntsiab lus kub ntawm nws cov khoom. Nov yog qee cov txheej txheem distillation thiab lawv cov ntawv thov: Distillation yooj yim, Fractional Distillation, Chav Distillation, Nqus Distillation, thiab Short Path Distillation.
Yooj yim distillation:
Yooj yim distillation yog cov txheej txheem distillation uas cais ob lossis ntau qhov sib xyaw los ntawm kev sib xyaw ua ke raws li lawv qhov sib txawv hauv cov ntsiab lus kub. Nws txawv ntawm lwm cov txheej txheem distillation, xws li fractional distillation, lub tshuab nqus tsev distillation, thiab chav distillation, los ntawm qhov sib txawv ntawm cov ntsiab lus kub ntawm cov khoom sib cais.
Yuav kom ua tau zoo, yooj yim distillation yuav tsum muaj qhov sib txawv loj ntawm 70 degree lossis ntau dua ntawm cov ntsiab lus kub ntawm cov khoom. Cov sib tov yog rhuab kom txog thaum cov khoom uas muaj qhov qis tshaj boiling point evaporates, nce rau hauv kem, thiab ces condensed thiab sau cais los ntawm lub siab boiling point (s).
Kev siv yooj yim ntawm cov distillation yooj yim suav nrog kev ua kom huv dej, sib cais cov khoom siv roj av, kev sib cais ntawm cov cawv thiab dej sib tov, thiab kev ua kom huv thiab cais cov organic tebchaw raws li lawv cov ntsiab lus kub. Tej yam yooj yim distillation feem ntau yog siv rau hauv cov ntawv thov no vim tias nws yog ib txoj hauv kev yooj yim thiab siv tau zoo rau kev sib cais cov khoom sib txawv nrog cov ntsiab lus sib txawv.
Piv txwv li, distillation yooj yim yog qhov tseem ceeb hauv kev sib cais cawv thiab dej los tsim cov cawv zoo. Hauv kev lag luam roj thiab roj, qhov yooj yim distillation yog qhov tseem ceeb rau kev cais cov roj crude rau hauv nws cov khoom sib txawv, xws li roj av, roj av, thiab roj av. Tej yam yooj yim distillation kuj yog feem ntau siv los ntxuav dej los ntawm boiling nws thiab sau cov chav, tawm hauv qab tej impurities.
Fractional distillation:
Fractional distillation yog cov txheej txheem distillation siv rau kev sib cais cov khoom los ntawm cov khoom sib xyaw uas muaj cov ntsiab lus kub kub uas nyob ze ua ke tshaj qhov sib cais los ntawm cov distillation yooj yim. Nws yog qhov txawv ntawm lwm cov txheej txheem distillation, xws li yooj yim distillation thiab nqus distillation, los ntawm nws siv cov fractionating kem cais cov khoom ntawm cov khoom sib tov.
Cov fractionating kem muaj ob peb lub tais los yog daim hlau sib cais thoob plaws hauv kem thiab pab tsim kom muaj thaj chaw loj dua rau cov vaporization thiab condensation cycles, txhim kho kev sib cais ntawm cov khoom. Qhov kub hauv kem txo qis thaum nws nce mus, tso cai rau cov ntsiab lus qis ntawm cov boiling point kom nce siab nyob rau hauv kem ua ntej yuav condensed.
Kev siv cov fractional distillation suav nrog kev sib cais ntawm cov roj crude rau hauv nws cov khoom sib txawv, xws li roj av, diesel, thiab kerosene, nrog rau kev sib cais ntawm cov khoom sib txawv hauv kev tsim cov tshuaj xws li benzene, toluene, thiab xylene. Fractional distillation kuj tseem siv rau hauv kev ua kom huv ntawm cov organic sib txuas, sib cais ntawm cov kua roj ntsha, thiab hauv kev tsim cov cawv.
Fractional distillation yog qhov zoo rau cov ntawv thov no vim tias nws muab kev sib cais ntau dua li qhov yooj yim distillation, ua rau nws zoo tagnrho rau ntau qhov sib xyaw ua ke. Cov fractionating kem tsim ntau qhov chaw saum npoo rau vaporization thiab condensation, ua kom cov txheej txheem ua haujlwm zoo dua thiab tso cai rau kev sib cais zoo ntawm cov khoom sib xyaw. Tsis tas li ntawd, fractional distillation yog ib qho txiaj ntsig zoo thiab muaj txiaj ntsig, ua rau nws muaj txiaj ntsig zoo rau kev lag luam loj.
Chav distillation:
Steam distillation yog cov txheej txheem distillation siv los cais cov sib xyaw ua ke ntawm cov khoom tsis hloov pauv, xws li cov roj tseem ceeb ntawm cov khoom cog. Nws yog qhov txawv ntawm lwm cov txheej txheem distillation los ntawm kev siv cov ncu lossis dej vapor ua tus nqa tus neeg sawv cev rau cov sib xyaw ua ke.
Hauv chav distillation, qhov sib tov yog rhuab, thiab chav yog dhau los ntawm nws. Lub chav nqa cov volatile tebchaw nrog rau nws, thiab cov sib tov yog condensed kom cais cov volatile Cheebtsam los ntawm non-volatile sawv daws yuav. Txoj kev no yog qhov tshwj xeeb tshaj yog rau kev rho tawm cov roj tseem ceeb los ntawm cov nroj tsuag vim tias nws txo qis degradation ntawm ilv aromatic compounds uas tuaj yeem tshwm sim nrog lwm txoj kev distillation.
Kev siv ntau yam ntawm chav distillation suav nrog kev rho tawm cov roj yam tseem ceeb los ntawm cov nroj tsuag, xws li lavender, peppermint, thiab eucalyptus. Chav distillation yog nyiam nyob rau hauv cov ntawv thov no vim nws tso cai rau maj mam rho tawm ntawm cov tebchaw volatile yam tsis ua rau lawv qhov kub thiab txias uas tuaj yeem ua rau lawv qhov zoo. Cov roj tseem ceeb tau siv dav hauv cov tshuaj tsw qab, aromatherapy, thiab flavorings.
Lwm daim ntawv thov ntawm chav distillation yog kev sib cais ntawm cov khoom sib xyaw uas cov khoom sib txawv hauv dej. Los ntawm kev siv lub zog, cov khoom tsis sib haum xeeb tuaj yeem sib cais los ntawm cov khoom tsis hloov pauv yam tsis muaj qhov sib xyaw ncaj qha. Qhov no yog tshwj xeeb tshaj yog pab tau rau purifying organic tebchaw uas yog immiscible nrog dej.
Nqus distillation:
Lub tshuab nqus tsev distillation yog cov txheej txheem distillation siv los cais cov khoom sib xyaw ntawm qhov sib tov ntawm qhov kub thiab txias los ntawm kev txo qhov siab hauv qhov system. Nws yog qhov txawv ntawm lwm txoj kev distillation los ntawm nws lub peev xwm ua haujlwm ntawm kev txo qis, uas txo qis cov ntsiab lus kub ntawm cov khoom thiab pab tiv thaiv thermal degradation lossis decomposition.
Nyob rau hauv lub tshuab nqus tsev distillation, lub siab nyob rau hauv lub distillation apparatus yog txo, feem ntau yog siv lub tshuab nqus tsev twj tso kua mis, uas tso cai rau kev sib cais ntawm cov khoom nyob rau hauv qis kub. Los ntawm kev txo qhov siab, cov ntsiab lus kub ntawm cov khoom raug txo qis, tso cai rau kev sib cais yooj yim dua. Qhov no tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau cov hluav taws kub-rhiab heev uas tuaj yeem raug puas los yog decomposed ntawm qhov kub siab dua.
Kev siv ntau yam ntawm lub tshuab nqus tsev distillation suav nrog kev ua kom huv ntawm cov ntsiab lus kub boiling, xws li lubricants, cov kuab tshuaj, thiab qee yam tshuaj. Lub tshuab nqus tsev distillation yog qhov muaj txiaj ntsig zoo hauv cov xwm txheej no vim tias nws ua rau muaj kev sib cais ntawm cov khoom yam tsis muaj kev cuam tshuam rau qhov kub siab uas yuav tsum tau ua hauv cov txheej txheem distillation. Qhov no pab khaws cov kev ncaj ncees thiab zoo ntawm cov tebchaw raug distilled.
Lub tshuab nqus tsev distillation kuj tseem siv dav hauv kev lag luam roj av rau kev kho cov roj av. Nws tso cai rau kev sib cais ntawm ntau feem ntawm qhov kub thiab txias, uas ua rau cov khoom lag luam zoo dua qub xws li roj av, diesel, thiab dav hlau roj. Tsis tas li ntawd, lub tshuab nqus tsev distillation yog ua haujlwm nyob rau hauv kev tsim cov tshuaj, qhov twg cov khoom sib xyaw me me tuaj yeem raug cuam tshuam rau degradation nyob rau hauv qhov kub thiab txias.
Short Path Distillation:
Txoj kev luv luv distillation, tseem hu ua molecular distillation, yog cov txheej txheem tshwj xeeb distillation uas ua haujlwm nyob rau hauv lub tshuab nqus tsev siab thiab siv txoj hauv kev luv luv ntawm cov evaporator thiab condenser. Nws yog qhov txawv los ntawm lwm txoj kev distillation los ntawm nws lub peev xwm ua kom tiav qib siab ntawm kev sib cais rau cov cua sov-rhiab thiab kub-rhaub-qhov chaw sib txuas, nrog rau kev ua tiav kev ua kom huv ntawm cov khoom sib xyaw.
Nyob rau hauv txoj kev luv luv distillation, cov sib tov yog rhuab nyob rau hauv ib tug evaporator nruab nrog ib tug luv luv txoj kev, yog li txo qhov kev ncua deb mus los ntawm lub vapor molecules ua ntej mus txog lub condenser. Txoj kev luv luv no txo cov sij hawm nyob hauv thiab txo txoj hauv kev ntawm thermal degradation lossis decomposition ntawm cov khoom. Tsis tas li ntawd, lub kaw lus ua haujlwm nyob rau hauv lub tshuab nqus tsev siab, uas ua rau txo qis cov ntsiab lus kub ntawm cov tebchaw thiab txo qhov siab gradient, tso cai rau maj mam sib cais ntawm qhov kub thiab txias.
Kev siv ntau yam ntawm txoj kev luv luv distillation suav nrog kev ua kom huv thiab muaj zog ntawm cov roj, waxes, rog, thiab lwm yam khoom kub-kub. Cov txheej txheem tshwj xeeb yog qhov zoo tshaj plaws rau kev rho tawm cov roj yam tseem ceeb, qhov uas nws tuaj yeem cais cov tshuaj tsw qab tsis zoo los ntawm cov impurities uas tsis yog-volatile impurities, uas ua rau cov roj purified heev nrog txhim kho aroma thiab tsw profiles. Txoj kev luv luv distillation kuj tseem siv rau hauv kev lag luam kws tshuaj rau kev ua kom huv ntawm cov khoom xyaw tshuaj nquag (APIs) thiab hauv kev tsim cov kuab tshuaj purity siab thiab cov tshuaj zoo.
Cov yam ntxwv tshwj xeeb ntawm txoj kev luv luv distillation ua rau nws muaj txiaj ntsig zoo rau cov ntawv thov no. Nws muaj peev xwm ua haujlwm nyob rau hauv lub tshuab nqus tsev siab thiab qhov kub thiab txias yuav pab khaws cia qhov zoo thiab kev ncaj ncees ntawm cov rhiab sib txuas, tiv thaiv decomposition thiab thermal puas. Los ntawm kev ua tiav kev sib cais zoo thiab kev ua kom huv, txoj kev luv luv distillation ua rau cov khoom lag luam zoo nrog cov khoom txhim kho thiab nce tus nqi.
Xaus:
Tom qab paub txhua yam li cas txhua qhov distillation yog txawv ntawm lwm tus. Txhawm rau xaiv cov txheej txheem distillation tsim nyog, koj yuav tsum xav txog qhov xwm txheej ntawm qhov sib tov nrog rau cov khoom ntawm cov khoom uas koj npaj siab yuav cais. Kev nkag siab qhov sib txawv ntawm cov txheej txheem no thiab lawv cov ntawv thov yuav pab koj xaiv txoj hauv kev zoo tshaj plaws rau koj cov kev xav tau tshwj xeeb.