Muaj ntau txoj hauv kev los kho kom zoo
Tom qab thawj zaug xovxwm lossis leaching ntawm lub tshuab roj, peb hu nws cov roj crude, thiab muaj ntau impurities nyob rau hauv cov roj crude, cov impurities yuav ua rau cov roj metamorphic, muaj teeb meem rau tib neeg noj qab haus huv. Lub hom phiaj ntawm refining yog tshem tawm cov khoom impurities muaj nyob rau hauv cov roj, dawb fatty acids, phospholipid, colloid, wax, pigment, tsw thiab hais txog. Yog li cov roj hauv peb lub neej niaj hnub, txawm tias nyem los yog rho tawm, yuav luag yuav tsum tau ua kom zoo dua ua ntej noj.
Cov roj crud feem ntau yog xim dub, tsis zoo hauv pob tshab lossis txawm tias huab. Tom qab ua haujlwm ntev, muaj sediment thiab suspension. Qee cov roj crud muaj ntxhiab tsw thiab ntau ua npuas ncauj. Tom qab refining, cov roj ua noj tuaj yeem khaws cia ntev dua. Yog li yuav ua li cas kho cov roj crude, peb tau sau cov hauv qab no peb feem ntau siv:
1. Cov txheej txheem kev siv tshuab: feem ntau suav nrog nag lossis daus, pom, kev sib cais centrifugal thiab lwm cov kauj ruam, yog siv cov roj centrifugal cais cov neeg kho tshuab impurities hauv cov roj thiab ib feem ntawm cov gel soluble impurities.
2. Cov txheej txheem tshuaj: feem ntau suav nrog acid refining, alkali refining, ntxiv rau, muaj roj, oxidation thiab lwm cov kauj ruam, acid refining yog kho nrog acid, feem ntau yog tshem tawm pigment, colloidal impurities, alkali refining yog kho nrog alkali, feem ntau yog tshem tawm cov roj dawb. acids, oxidation feem ntau yog siv rau decolorization.
3. Lub cev thiab tshuaj txoj kev: feem ntau suav nrog hydration, decolorization, chav distillation, thiab lwm yam., hydration yog tsuas yog tshem tawm phospholipids, decolorization yog tsuas yog tshem tawm cov xim, chav distillation yog siv los tshem tawm cov ntxhiab tsw thiab tsis muaj fatty acids.
Txawm hais tias tsis yog tag nrho cov roj crude tsis tuaj yeem noj ncaj qha, feem ntau cov roj crude muaj teeb meem rau tib neeg kev noj qab haus huv thaum noj ncaj qha. Piv txwv li, noj cov roj cog qoob loo ntau dua rau lub sijhawm ntev yuav ua rau tib neeg raug kev txom nyem los ntawm kev tshav ntuj.Yuav muaj lub cev tsis muaj zog, tawm hws tsawg, tawv nqaij kub hnyiab, dej ntws, palpitation ua tsis taus pa, kiv taub hau, tsis qab los noj mov thiab lwm yam tsos mob.Los ntawm kev kho kom zoo, cov dej cov ntsiab lus, impurities, acid tus nqi thiab peroxide tus nqi ntawm cov roj tuaj yeem ua tau raws li cov qauv tsim los ntawm lub xeev. Cov roj kuj tseem muaj txiaj ntsig zoo rau kev khaws cia, tsis yooj yim rau rancidity thiab deterioration. Ua noj nrog cov roj refined kuj tsis tsim cov pa luam yeeb ntau thiab tswj cov roj tsw qab.
