Txheej txheem extraction
Cov txheej txheem ntawm kev siv cov kuab tshuaj organic los rho tawm thiab cais cov khoom rho tawm los ntawm cov kua dej tsis zoo yog hu ua organic solvent kua-kua extraction method, abbreviated as solvent extraction method. Nws yog txheej txheem hloov loj uas hloov cov tshuaj los ntawm ib theem kua mus rau lwm qhov.
Cov kuab tshuaj extraction tau siv ua ntej hauv kev lag luam petrochemical, organic chemistry, tshuaj chemistry thiab analytical chemistry. Txawm li cas los xij, nyob rau hauv 40 xyoo dhau los, vim yog kev txhim kho ntawm atomic zog science thiab thev naus laus zis, kev xav tau ntawm cov khoom siv ultrapure thiab cov kab hluav taws xob tsim tawm, cov kuab tshuaj extraction tau tsim zoo heev hauv kev lag luam roj nuclear, tsis tshua muaj metallurgy thiab lwm yam lag luam.
Piv nrog rau txoj kev sib cais xws li graded nag lossis daus, graded crystallization, thiab ion pauv, hnyav extraction muaj ib tug series ntawm zoo xws li zoo sib cais nyhuv, loj ntau lawm muaj peev xwm, yooj yim rau ceev thiab nruam ntau lawm, thiab yooj yim mus cuag tsis siv neeg tswj. Yog li ntawd, nws tau maj mam dhau los ua txoj hauv kev tseem ceeb rau kev sib cais loj ntawm cov ntiaj teb tsis tshua muaj.
Cov khoom sib cais ntawm cov kuab tshuaj extraction muaj xws li sib tov lub tank, centrifugal extractor, thiab lwm yam. Cov extractants siv rau purifying lub ntiaj teb tsis tshua muaj xws li: cationic extractants sawv cev los ntawm acidic phosphate esters xws li P204 thiab P507, anion pauv kua N1923 sawv cev los ntawm amines, thiab hnyav extractants. sawv cev los ntawm nruab nrab phosphate esters xws li TBP thiab P350. Cov extractants no muaj viscosity siab thiab ceev, ua rau lawv nyuaj rau cais los ntawm dej. Nws feem ntau yog diluted thiab rov siv dua nrog cov kuab tshuaj xws li kerosene.
Cov txheej txheem rho tawm feem ntau tuaj yeem muab faib ua peb theem tseem ceeb: rho tawm, ntxuav, thiab thim rov qab. Mineral raw khoom rau extracting tsawg lub ntiaj teb hlau thiab dispersed ntsiab.
Lub sij hawm xa tuaj: Plaub Hlis-20-2023