Kev hloov pauv ntawm propylene rau hauv propylene oxide yog txheej txheem nyuaj uas yuav tsum muaj kev nkag siab zoo ntawm cov tshuaj tiv thaiv cov txheej txheem cuam tshuam. Kab lus no delves rau hauv ntau txoj hauv kev thiab cov tshuaj tiv thaiv uas xav tau rau kev sib txuas ntawm propylene oxide los ntawm propylene.

Txoj kev siv ntau tshaj plaws rau kev tsim cov propylene oxide yog los ntawm oxidation ntawm propylene nrog molecular oxygen nyob rau hauv lub xub ntiag ntawm ib tug catalyst. Cov tshuaj tiv thaiv txheej txheem cuam tshuam nrog kev tsim cov peroxy radicals, uas tom qab ntawd hnov ​​​​mob nrog propylene los tsim propylene oxide. Lub catalyst plays lub luag haujlwm tseem ceeb hauv cov tshuaj tiv thaiv no, vim nws txo qis lub zog ua kom muaj zog rau kev tsim cov peroxy radicals, yog li txhim kho cov tshuaj tiv thaiv.

Ib qho ntawm feem ntau siv catalysts rau cov tshuaj tiv thaiv no yog nyiaj oxide, uas yog loaded mus rau ib tug txhawb nqa khoom xws li alpha-alumina. Cov khoom txhawb nqa muab thaj chaw siab rau cov catalyst, kom ntseeg tau tias muaj kev sib cuag ntawm cov reactants thiab cov catalyst. Kev siv cov nyiaj oxide catalysts tau pom tias ua rau muaj txiaj ntsig zoo ntawm propylene oxide.

Kev oxidation ntawm propylene siv cov txheej txheem peroxide yog lwm txoj hauv kev uas tuaj yeem ua haujlwm rau kev tsim cov propylene oxide. Nyob rau hauv cov txheej txheem no, propylene yog reacted nrog ib tug organic peroxide nyob rau hauv lub xub ntiag ntawm ib tug catalyst. Cov peroxide reacts nrog propylene los tsim ib qho nruab nrab dawb radical, uas tom qab ntawd decomposes yield propylene oxide thiab cawv. Txoj kev no muaj qhov zoo ntawm kev muab kev xaiv ntau dua rau propylene oxide piv rau cov txheej txheem oxidation.

Cov kev xaiv ntawm cov tshuaj tiv thaiv kuj tseem ceeb heev rau kev txiav txim siab qhov tawm los thiab purity ntawm propylene oxide khoom. Qhov kub, siab, lub sijhawm nyob, thiab mole piv ntawm cov reactants yog qee qhov tseem ceeb uas yuav tsum tau ua kom zoo. Nws tau raug pom tias nce qhov kub thiab txias lub sijhawm nyob hauv feem ntau ua rau muaj kev nce ntxiv ntawm cov propylene oxide. Txawm li cas los xij, qhov kub thiab txias kuj tuaj yeem ua rau tsim cov khoom siv los ntawm cov khoom, txo cov purity ntawm cov khoom xav tau. Yog li ntawd, qhov sib npaug ntawm high yields thiab siab purity yuav tsum raug ntaus.

Hauv kev xaus, kev sib txuas ntawm propylene oxide los ntawm propylene tuaj yeem ua tiav los ntawm ntau txoj hauv kev, suav nrog oxidation nrog molecular oxygen lossis peroxide txheej txheem. Kev xaiv ntawm catalyst thiab cov tshuaj tiv thaiv kab mob ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab cov txiaj ntsig thiab purity ntawm cov khoom kawg. Kev nkag siab zoo ntawm cov tshuaj tiv thaiv cov txheej txheem koom nrog yog qhov tseem ceeb rau kev txhim kho cov txheej txheem thiab tau txais cov khoom zoo propylene oxide.