Oxidation Catalyst & Ua kua theem oxidation catalyst
Oxidation Catalyst & Ua kua theem oxidation catalyst
Thaum ethylene thiab propylene tau los ntawm roj av hydrocarbon cracking yog siv los ua cov ntaub ntawv polymerization, xaiv hydrogenation yuav tsum tau tshem tawm cov kab impurities xws li alkyne, diene, carbon monoxide, carbon dioxide thiab oxygen, tsis muaj olefin.Cov catalyst siv feem ntau yog palladium, platinum lossis npib tsib xee, cobalt, molybdenum, thiab lwm yam, ntawm alumina.Xaiv hydrogenation catalysts nrog cov khoom sib txawv tuaj yeem tau txais los ntawm kev tswj hwm tus nqi ntawm cov khoom nquag, kev tsim khoom ntawm kev txhawb nqa thiab catalyst.Lwm yam xws li tawg roj refining, nitrobenzene hydrogenation txo rau aniline, hydrogenation catalyst.
Catalyst rau sib sib zog nqus hydrogenation rau saturated compounds.Xws li benzene hydrogenation rau cyclohexane nrog nickel alumina catalyst, phenol hydrogenation rau cyclohexanol, muaj dinitrile hydrogenation rau hexdiamine nrog nickel catalyst.
Siv silicon carbide los yog α -alumina raws li kev txhawb nqa (nrog me me ntawm barium oxide li cocatalyst).Tom qab kev txhim kho txuas ntxiv ntawm cov catalyst thiab cov txheej txheem txheej txheem, qhov hnyav ntawm ethylene tau tshaj 100%.
Lub catalyst sprayed ntawm silicon carbide los yog corundum rau oxidation ntawm o-xylene rau phthalic anhydride.Ib qho catalyst npaj los ntawm kev txau cov khoom nquag ntawm vanadium-molybdenum series oxides ntawm corundum rau oxidation ntawm benzene los yog butane rau txiv neej anhydride.Kev txhim kho ntawm hom catalyst no yog rau kev txhim kho ntawm ntau cov khoom, yim yam catalysts tau tshwm sim.Cov duab ntawm cov cab kuj tseem hloov pauv los ntawm kheej kheej mus rau lub voj voog, semicircle kom yooj yim rau kev hloov cua sov.Cov qauv dav dav yog mus nrhiav kev thauj khoom siab, siab yield thiab siab purity ntawm cov khoom.
Xws li methanol oxidation rau hauv formaldehyde nrog nyiaj - pumice (los yog alumina), hlau oxide - molybdenum oxide thiab electrolytic nyiaj catalyst.
Nyob rau xyoo 1960, lub catalyst uas muaj bismuth-mo-phosphorus compound oxide catalyst tau tsim.Acrylonitrile tuaj yeem ua ke rau hauv ib kauj ruam los ntawm kev ntxiv propylene, ammonia thiab cua rau hauv cov catalyst.Txhawm rau txhim kho cov kev xaiv thiab cov txiaj ntsig thiab txo cov pa phem ib puag ncig, ntau lub teb chaws tau txhim kho cov catalyst, thiab qee cov catalysts tshiab muaj txog li 15 hom ntsiab lus.Oxygen chlorination catalyst, lub 60's tsim tooj liab chloride alumina catalyst, nyob rau hauv lub txaj fluidized reactor los ntawm ethylene, hydrogen chloride thiab huab cua los yog oxygen tau txais dichloroethane.Dichloroethane tau pyrolyzed los tsim vinyl chloride monomer.Txoj kev no muaj txiaj ntsig zoo rau kev txhim kho PVC hauv thaj chaw uas muaj hluav taws xob kim thiab petrochemicals tsim, kev tsim qauv ntawm kev txhawb nqa thiab catalyst.Lwm yam xws li tawg roj refining, nitrobenzene hydrogenation txo rau aniline, hydrogenation catalyst.
Ua kua theem oxidation catalyst
Feem ntau muaj:
(1) Ethylene, propylene oxidation acetaldehyde, acetone (Wacker method), nrog me me ntawm palladiumchloride tooj liab chloride tov catalyst, los ntawm olefin, huab cua los yog oxygen, tom qab ib los yog ob kauj ruam ntawm cov tshuaj tiv thaiv kom tau qhov yuav tsum taucov khoom uas muaj oxygen.Qhov tsis zoo yog qhov hnyav corrosion ntawm cov khoom siv tshuaj tiv thaiv.
(2) Aromatic sab saw oxidationrau aryl acid catalyst, xws li p-xylene nyob rau hauv acetic acid tov nrog cobalt acetate thiab ib tug me me ntawm ammonium bromidecua sov, huab cua oxidation ntau lawm terephthalic acid, tab sis hnyav corrosion ntawm cov khoom siv tshuaj tiv thaiv.
Sau koj cov lus ntawm no thiab xa tuaj rau peb
