Cov khoom siv tshuaj lom neeg tuaj yeem muab faib ua ob pawg raws li lawv muaj pes tsawg leeg: organic thiab inorganic. Lawv txoj kev npaj yog nyob ntawm qhov sib txawv ntawm cov khoom siv raw.
Inorganic Chemical Raw Materials: Noj Magnesium Chloride ua piv txwv
Magnesium chloride feem ntau yog tsim los ntawm kev rho tawm magnesium ntsev los ntawm ntuj ntsev pas dej los yog dej hiav txwv, ua raws li cov tshuaj tiv thaiv thiab kev ua kom zoo. Cov khoom siv tseem ceeb muaj xws li cov pas dej ntsev, dej hiav txwv, thiab cov zaub mov. Lub pas dej ntsev thiab cov dej hiav txwv extraction feem ntau suav nrog cov khoom siv raw, kev sib cais los nag, evaporation thiab concentration, thiab crystallization. Mineral extraction txoj kev feem ntau muaj xws li ore crushing, leaching, pom, thiab concentration. Cov txheej txheem ua kom zoo tuaj yeem suav nrog kev sib cais crystallization, electrolysis, thiab nag lossis daus magnesium hydroxide.
Organic Chemical Raw Materials: Noj PX (para-xylene) ua piv txwv
PX feem ntau yog los ntawm naphtha, ib qho khoom nruab nrab hauv roj av refining. Tom qab kev hloov pauv catalytic lossis ethylene tawg, cov roj av hloov kho thiab cov roj av tawg tau txais. Cov no yog tom qab ntawd ua tiav los ntawm aromatics extraction kom tau cov xylene sib xyaw, uas yog tom qab sib cais los ntawm adsorption.
