Qhov zoo ntawm cov dej cawv tsuas yog suav nrog cov hauv qab no:
Kev haus dej haus cawv ua ntxiv: Los ntawm cov txheej txheem distillation, cov dej cawv muaj peev xwm tiv thaiv tau cov kua ntxiv tom qab hws, yog li kev haus cawv ntau. Piv txwv li, kev haus cawv ntawm cov cawv distilled distilled feem ntau tuaj yeem ncav cuag 50% mus rau 70%, lossis ntau dua.
Txhim kho cov tsw: tus txheej txheem distillation tsis tuaj yeem ua kom cov cawv ntau ntxiv, tab sis kuj txhim kho cov qab ntawm cov cawv. Thaum lub sij hawm distillation cov txheej txheem, ntau yam volatile muaj zog hauv fermented mash yuav yaj hauv lem raws li lawv cov ntsiab lus npau npau. Cov feem ke no ua lub luag haujlwm tseem ceeb hauv cov ntxhiab thiab saj ntawm cov cawv. Los ntawm distillation, cov cheebtsam no yog feeb kom meej, ua rau cov tsw ntawm cov cawv ntau dua thiab nyuaj.
Kev tua cov kab mob me: thaum lub sij hawm fermentation txheej txheem, ntau cov kab mob me, suav nrog cov poov xab, cov kab mob, yuav muaj nyob hauv fermented mash. Cov kab mob me no yuav tsim qee cov khoom lag luam uas tsis muaj kev haus dej, xws li haus dej cawv, qaub, thiab lwm yam ntawm cov cawv txiv hmab. Qhov siab kub ntawm cov txheej txheem distillation tuaj yeem tua cov kab mob sib txawv no, yog li txo cov khoom siv tsis zoo thiab txhim kho lub purity thiab kev nyab xeeb ntawm cov cawv.
Yooj yim khaws thiab thauj: kev haus dej cawv ntau dua yog qhov ruaj khov dua thiab tsis tshua muaj kev puas tsuaj ntau dua li cov dej cawv uas muaj dej cawv tsawg dua. Tom qab nce kev haus dej cawv los ntawm distillation, cia thiab kev thauj khoom ntawm caw yog yooj yim dua thiab nyab xeeb dua. High-concentration cawv tsis yooj yim rau oxidize thiab volatilize thaum lub sijhawm cia, yog li tswj nws cov tsw qub thiab zoo.
Tshem tawm impurities: los ntawm ntau cov distillations, impurities thiab lwm lub siab-boiling point Cheebtsam hauv cov cawv txiv hmab tau muab tshem tawm, yog li nce txoj kev coj dawb huv ntawm cov cawv txiv hmab. Txhua qhov distillation tshem tawm ib feem ntawm cov impurities, ua cov dej cawv kawg siab dua.
