Cov ntsiab lus ntawm molecular distillation
Molecular distillation yog ib qho tshwj xeeb ua kua-kua sib cais tshuab. Nws txawv ntawm ib txwm distillation uas tso siab rau qhov sib txawv ntawm qhov sib txawv ntawm qhov sib cais. Hloov chaw, nws tso siab rau qhov sib txawv ntawm txoj kev tsis pub dawb ntawm cov molecules ntawm cov khoom sib txawv kom ua tiav kev sib cais. Ntawm no, txoj kev pub dawb ntawm molecular motion ( sawv cev los ntawm λ) yog hais txog qhov kev ncua deb mus los ntawm cov molecule ntawm ob qhov kev sib tsoo.
Cov kua sib tov ntws raws lub phaj cua sov thiab yog rhuab. Lub teeb thiab hnyav molecules yuav khiav tawm ntawm cov kua dej thiab nkag mus rau theem roj. Txij li txoj kev dawb ntawm lub teeb thiab hnyav molecules sib txawv, cov molecules ntawm cov khoom sib txawv yuav txav mus txawv txav tom qab khiav tawm ntawm cov kua dej. Yog tias lub phaj condensation tuaj yeem teeb tsa tau zoo, lub teeb molecules yuav ncav cuag lub condensation phaj thiab yuav tsum tau condensed thiab tawm, thaum cov molecules hnyav uas tsis tuaj yeem ncav cuag lub condensation phaj yuav raug tso tawm raws cov kua sib xyaw. Ua li no, lub hom phiaj ntawm kev sib cais ntawm cov khoom tiav.
Cov yam ntxwv ntawm molecular distillation
Molecular distillation thev naus laus zis, raws li kev siv thev naus laus zis sib cais uas sib xyaw nrog lub ntiaj teb, muaj qhov zoo uas lwm cov thev naus laus zis sib cais tsis tuaj yeem sib xws:
1. Tsis tshua muaj kev khiav hauj lwm kub (ntau npaum li cas qis dua lub boiling point), lub tshuab nqus tsev kawm ntawv qib siab (tsis load Tsawg tshaj los yog sib npaug zos rau 1Pa), lub sij hawm luv luv cua sov (hauv vib nas this), siab sib cais efficiency, thiab lwm yam, tshwj xeeb tshaj yog haum rau kev sib cais ntawm siab. boiling point, kub-rhiab heev, thiab yooj yim oxidized tshuaj;
2. Nws tuaj yeem tshem tawm cov tshuaj tsis muaj molecular (deodorization), hnyav molecular tshuaj (decolorization) thiab tshem tawm impurities hauv qhov sib tov;
3. Cov txheej txheem kev sib cais yog txheej txheem kev sib cais ntawm lub cev, uas tuaj yeem tiv thaiv cov khoom sib cais los ntawm kev sib kis, tshwj xeeb tshaj yog cov khoom zoo ntawm cov khoom siv raw tuaj yeem khaws cia;
4. Lub degree ntawm kev sib cais yog siab, siab tshaj li ib txwm distillation thiab zoo tib yam nyias zaj duab xis evaporators.