Cov ntsiab lus tseem ceeb Taw qhia luv Txoj Kev Distillation (SPD) yog cov txheej txheem sib cais ua tau zoo uas feem ntau siv los ua kom huv cov cua sov-rhiab sib xyaw. Nws tau txais kev lees paub dav dav hauv kev lag luam xws li tshuaj, tshuaj, tshuaj pleev ib ce, thiab cov roj yam tseem ceeb vim nws lub peev xwm tshwj xeeb los tswj cov khoom lag luam ncaj ncees thaum ua tiav qib siab purity. Los ntawm kev ua haujlwm nyob rau hauv qhov txo qis, SPD tso cai rau cov distillation

Cov raj xa dej hauv chav kuaj yog cov cuab yeej tseem ceeb rau kev nyab xeeb thiab raug ntawm kev hloov kua lossis hmoov, kev lim dej, thiab kev sib cais theem. Txawm li cas los xij, kev xaiv hom raj xa dej tsis raug tuaj yeem ua rau muaj kev nchuav, kev lim dej tsis zoo, kev ua qias tuaj, lossis kev ua haujlwm qeeb. Phau ntawv qhia no piav qhia txog 9 hom raj xa dej hauv chav kuaj feem ntau thiab qhia thaum twg yuav tsum siv txhua hom. Koj tseem yuav pom tias siv tau yooj yim.