Propylene oxideyog ib qho tseem ceeb propylene derivative, thiab li ntawm 7% ntawm propylene yog siv rau propylene oxide ntau lawm txhua xyoo. Cov txheej txheem tsim khoom feem ntau suav nrog chlorohydrinization, co-oxidation (tseem hu ua indirect oxidation), thiab oxidation ncaj qha. Niaj hnub no, cov txheej txheem tseem ceeb ntawm kev tsim cov propylene oxide hauv ntiaj teb yog txoj kev chlorohydrinization thiab co-oxidation txoj kev. Txoj kev co-oxidation yog muab faib ua ethylbenzene co-oxidation txoj kev thiab isobutane co-oxidation txoj kev. Nyob rau hauv xyoo tas los no, txoj kev cumene oxidation thiab hydrogen peroxide ncaj qha oxidation txoj kev tau ntse tsim thiab successively pom nyob rau hauv industrial ntau lawm, thiab oxidation ncaj qha txoj kev siv oxygen raws li cov oxidant tseem nyob rau hauv txoj kev loj hlob. Hauv qab no yog yuav ua li cas ua propylene oxide.
Cov txheej txheem tsim khoom tau muab faib ua cov hauv qab no ·
Txoj kev chlorohydrin · ·
Co-oxidation
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Cumene oxidation txoj kev
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HPPO method
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Kev tsim cov chlorohydrins muaj keeb kwm ntev thiab tau ua haujlwm rau ntau tshaj 60 xyoo. Cov txheej txheem tseem ceeb ntawm txoj kev chlorohydrin yog propylene chlorohydrin, saponification ntawm txiv qaub kua txiv, thiab cov khoom ua kom zoo. Nws yog tus cwj pwm los ntawm kev paub ntau lawm technology, loj kev khiav hauj lwm load yooj, zoo xaiv, tsis tshua muaj yuav tsum tau rau raw khoom propylene purity, txhim kho kev ruaj ntseg ntau lawm, thiab tsawg tsim peev. Vim muaj kev nqis peev tsawg hauv cov cuab yeej cuab tam thiab cov khoom siv qis, cov khoom tsim los ntawm propylene oxide
yog tus nqi sib tw heev. Niaj hnub no, txog 40% ntawm lub ntiaj teb no' s propylene oxide ntau lawm muaj peev xwm yog cov txheej txheem chlorohydrin.
Qhov tsis zoo ntawm covtshuaj chlorohydrintxoj kev yog tias cov khoom siv dej tau siv, thiab ntau cov dej khib nyiab thiab cov khib nyiab pov tseg yog tsim. Rau txhua txoj kev Chlorohydrin
1t ntawm propylene oxide tsim, 40 ~ 50t chloride-muaj saponification cov dej khib nyiab thiab 2t lossis ntau dua cov khib nyiab pov tseg. Cov dej khib nyiab muaj qhov kub thiab txias, pH siab, thiab chlorine. Lub" tsib siab" Cov yam ntxwv ntawm cov hauv paus ntsiab lus siab, cov ntsiab lus COD siab, thiab cov ntsiab lus siab tshem tawm cov khoom tsis yooj yim. Nyob rau tib lub sijhawm, txoj kev chlorohydrin kuj tseem siv ntau cov tshuaj chlorine thiab cov khoom siv roj ntsha, thaum cov tshuaj chlorine thiab calcium raug tso tawm hauv cov dej khib nyiab thiab cov khoom pov tseg, thiab cov tshuaj hypochlorous acid uas tsim thaum lub sij hawm tsim khoom kuj ua rau muaj kev xeb loj heev. ntawm cov khoom siv.
Txoj kev co-oxidation
Txoj kev co-oxidation, tseem hu ua Hakon txoj kev, suav nrog txoj kev isobutane co-oxidation thiab ethylbenzene co-oxidation txoj kev. Lub co-oxidation cov tshuaj tiv thaiv ntawm isobutane los yog ethylbenzene thiab propylene yog nqa tawm los tsim tert-butanol los yog styrene. Ua propylene oxide.
Txoj kev co-oxidation kov yeej cov kev tsis txaus ntawm chlorohydrin txoj kev, xws li kev xeb loj thiab ntau cov dej phwj tuaj, thiab muaj qhov zoo ntawm cov khoom siv qis (co-khoom nqi sib koom) thiab tsawg dua ib puag ncig. Txij li thaum nws industrialization nyob rau hauv 1969, nws tau tsim sai heev thoob ntiaj teb. Niaj hnub no, lub peev xwm ntau lawm ntawm co-oxidation propylene oxide suav txog li 55% ntawm lub ntiaj teb' s tag nrho cov peev xwm tsim tau.
Cov kev tsis txaus ntawm cov txheej txheem co-oxidation yog cov txheej txheem ntev ntws, ntau yam khoom siv raw, siab purity ntawm propylene, cov txheej txheem kev ua haujlwm yog nqa tawm nyob rau hauv siab dua, cov khoom siv feem ntau yog cov hlau alloy, cov khoom siv yog siab, thiab kev tsim kho kev nqis peev loj.
Cumene oxidation txoj kev
Txoj kev cumene oxidation siv lub txaj ruaj khov reactor nrog titanium-based catalysts thiab siv cumene hydroperoxide (CHP) ua cov oxidant. CHP epoxidizes propylene kom tau propylene oxide thiab ob Methylbenzyl cawv, tom kawg yog lub cev qhuav dej rau α-methyl styrene, thiab tom qab ntawd hydrogenated los tsim cumene, uas yog oxidized rau CHP thiab rov siv dua. Txoj kev cumene oxidation yog kev txhim kho ntawm txoj kev co-oxidation.
Qhov sib txawv tseem ceeb ntawm txoj kev co-oxidation yog cov cumene siv es tsis txhob ntawm ethylbenzene, thiab cov cumene tau siv dua thiab tsis tsim cov khoom sib koom ua ke. Txij li cov txheej txheem no tsis xav tau cov cuab yeej pabcuam rau kev sib koom ua ke ntawm styrene, cov cuab yeej siv peev nyiaj yog kwv yees li 1/3 qis dua li ntawm cov txheej txheem co-oxidation, thiab cov khoom siv los tiv thaiv corrosion yog xav tau rau cov txheej txheem chlorohydrin siv cov roj chlorine. tsis tas yuav.
HPPO method
Hydrogen peroxide direct oxidation method (HPPO method) yog txheej txheem tshiab ntawm epoxidizing propylene rau propylene oxide los ntawm hydrogen peroxide (hydrogen peroxide). Tsuas yogpropylene oxidethiab dej yog tsim nyob rau hauv cov txheej txheem ntau lawm. Cov txheej txheem ntws yog yooj yim thiab cov khoom tawm los yog siab. , Tsis muaj lwm yam co-products, yeej tsis muaj kuab paug, thiab nws yog ib tug environmentally phooj ywg huv huv system ntau lawm.
Yog tias koj xav rho tawm propylene oxide lossis lwm yam ntaub ntawv ntsig txog, txais tos rau peb lub tuam txhab, Shaanxi BLOOM TECH Co., Ltd. Peb yuav muab cov lus teb zoo meej rau koj.