Propylene oxideyog ib qho tseem ceeb derivative ntawm propylene, thiab li ntawm 7 feem pua ntawm propylene yog siv nyob rau hauv zus tau tej cov propylene oxide txhua txhua xyoo. Niaj hnub no, cov txheej txheem kev lag luam tseem ceeb ntawm propylene oxide hauv ntiaj teb yog chlorination thiab co-oxidation, ntawm cov co-oxidation tau muab faib ua ethylbenzene co-oxidation thiab isobutane co{{4. }}oxidation. Nyob rau hauv xyoo tas los no, txoj kev isopropylbenzene oxidation thiab hydrogen peroxide ncaj qha oxidation txoj kev tau ntse tsim thiab industrialized successively, thiab oxidation ncaj qha txoj kev siv oxygen raws li ib tug oxidant kuj nyob rau hauv txoj kev loj hlob. Cov hauv qab no yog los qhia txog qee qhov tshwj xeeb Propylene oxide txheej txheem tsim khoom
1. Txoj kev chlorohydrin
2. Co- txoj kev oxidation
3. Direct oxidation txoj kev
Txoj kev chlorohydrin
Cov txheej txheem chlor- cawv muaj keeb kwm ntev ntawm kev tsim khoom thiab tau ua haujlwm rau ntau tshaj 60 xyoo. Cov txheej txheem tseem ceeb ntawm chlor- cawv txoj kev yog chlorination ntawm propylene, txiv qaub kua txiv saponification thiab cov khoom refining, uas yog yus muaj los ntawm ib tug paub tab txheej txheem, saj zawg zog khiav hauj lwm load, zoo xaiv, purity ntawm raw khoom propylene yuav tsum tau. tsis siab, uas tuaj yeem txhim kho kev nyab xeeb ntawm kev tsim khoom thiab kev nqis peev tsawg hauv kev tsim kho. Vim muaj kev nqis peev tsawg hauv cov khoom muaj nqis ruaj khov thiab cov khoom siv qis, nws cov khoom muaj kev sib tw nqi zog. Niaj hnub no, kwv yees li 40 feem pua ntawm lub ntiaj teb kev tsim muaj peev xwm ntawm propylene oxide yog chlorhydrin.
Qhov tsis zoo ntawm chlor-txoj kev cawv yog kev siv dej, tsim cov dej khib nyiab ntau thiab cov khoom pov tseg, txhua qhov tsim tawm ntawm 1t propylene oxide tsim 40 50t ntawm chlorinated saponification cov dej khib nyiab thiab ntau tshaj 2t ntawm cov khib nyiab pov tseg, cov dej khib nyiab muaj qhov kub thiab txias, pH siab, cov ntsiab lus chlorine siab, siab COD cov ntsiab lus thiab cov ntsiab lus tshem tawm siab ntawm "tsib siab" yam ntxwv, nyuaj rau kev kho. Tib lub sijhawm, cov tshuaj chlorine cawv kuj siv ntau lub zog- cov khoom siv tshuaj chlorine thiab txiv qaub, thaum cov tshuaj chlorine thiab calcium tau tawm hauv cov dej khib nyiab thiab cov khib nyiab pov tseg, thiab cov tshuaj hypochlorite ua thaum lub sijhawm tsim khoom yog kuj hnyav corrosion ntawm cov khoom siv.
Co- txoj kev oxidation
Co-Oxidation method, tseem hu ua Haakon method, suav nrog 2 hom isobutane co-Oxidation method thiab ethylbenzene co-Oxidation method, uas yog co-Oxidation method ntawm isobutane lossis ethylbenzene nrog propylene los tsim tert-butanol lossis styrene, thiab co- tsim cov propylene oxide tib lub sijhawm.
Txoj kev co-oxidation txoj kev kov yeej qhov tsis zoo ntawm chlor- txoj kev cawv, xws li kev xeb thiab dej phwj tuaj, thiab muaj qhov zoo ntawm cov nqi tsim khoom tsawg thiab tsawg dua ib puag ncig. Txij li thaum nws industrialization nyob rau hauv 1969, nws tau tsim sai heev thoob ntiaj teb, thiab niaj hnub no, lub peev xwm ntawm cov co- oxidation txoj kev ntawm propylene oxide tau suav txog li 55 feem pua ntawm lub ntiaj teb no lub peev xwm tag nrho.
Qhov tsis zoo ntawm co- txheej txheem oxidation yog cov txheej txheem ntev ntws, ntau ntau yam ntawm raw cov ntaub ntawv, siab propylene purity yuav tsum, txheej txheem kev ua hauj lwm nyob rau hauv lub siab, cov khoom siv feem ntau yog siv hlau alloy, cov cuab yeej siv siab thiab kev nqis peev loj. Nyob rau tib lub sijhawm, propylene oxide hauv kev tsim cov co-oxidation, tsuas yog me me ntawm co- khoom, txhua tuj ntawm propylene oxide rau co- tsim 2.2 2.5t styrene los yog 2.3t kev sim-butanol, cov khoom siv raw thiab cov khoom muag kev txwv ntawm ib leeg, yuav tsum tau hais kom raug, tsuas yog propylene oxide thiab co-cov khoom lag luam xav tau yog qhov zoo ntawm cov txheej txheem tuaj yeem nthuav tawm. Tsis tas li ntawd, COD ntawm cov effluent uas ua los ntawm cov co{11}} oxidation txoj kev yog qhov siab, thiab cov nqi kho mob yog kwv yees li 10 feem pua ntawm tag nrho cov peev.
Direct Oxidation
Lyondell tab tom tsim lub tshuab oxidation ncaj qha rau kev hloov pauv ntawm propylene, hydrogen thiab oxygen rau propylene oxide siv cov khoom siv ua haujlwm bifunctional uas muaj cov silicate ntawm palladium thiab titanium los tsim hydrogen peroxide nrog hydrogen thiab oxygen thiab tom qab ntawd hloov propylene rau propylene oxide, tag nrho. txheej txheem ua tiav nyob rau hauv ib lub reactor. Cov txheej txheem tseem nyob rau theem pib.
Shaanxi BLOOM TECH Co., Ltd muaj 12 xyoo kev paub hauv Organic chemicals, nrog cov cuab yeej tshaj lij thiab cov neeg ua haujlwm tshaj lij los muab cov kev pabcuam zoo thiab cov khoom lag luam rau peb cov neeg siv khoom.