Activated alumina yog ib ceg tseem ceeb ntawm cov kev lag luam uas tsis yog xim hlau uas tau tsim nyob rau hauv xyoo lawm tsis ntev los no. Nws hais txog kev hloov theem aluminas xws li γ, κ, θ, η, δ, thiab χ; thiab alumina tebchaw muaj ib feem ntawm cov dej (Cov qauv tshuaj Molecular A12O3.nH2O, 0≤n< 1),="" cov="" aluminas="" muaj="" qee="" qhov="" sib="" xws:="" loj="" tshwj="" xeeb="" thaj="" chaw="" thaj="" chaw,="" ntau="" qhov="" pore="" qauv,="" thiab="" tsim="" nyog="" pore="" loj="" faib.="" raws="" li="" cov="" yam="" ntxwv="" saum="" toj="" no,="" kev="" ua="" kom="" muaj="" alumina="" yog="" siv="" hauv="" tshuaj,="" tshuaj="" lom="" neeg="" kev="" lag="" luam,="" thiab="" nws="" yog="" xim="" hlau.="" ,="" kev="" ua="" dej="" huv,="" tshuaj="" tsom,="" kev="" siv="" roj="" kho="" thiab="" lwm="" cov="" teb="" raws="" li="" adsorbents,="" catalysts,="" catalyst="" cov="" tsheb="" thauj="" khoom,="" thiab="" lwm="" yam,="" tau="" txais="" kev="" txhawj="" xeeb="" ntau="" ntxiv="" los="" ntawm="" cov="" neeg="" los="" ntawm="" txhua="" qhov="" ntawm="" lub="" neej,="" thiab="" nrog="" kev="" vam="" meej="" ntawm="" kev="" tshawb="" fawb="" thiab="" thev="" naus="" laus="" zis,="" nws="" yuav="" ua="" lub="" luag="" haujlwm="" tseem="" ceeb="" dua.="">
2. Kev faib tawm ntawm alumina qhib
2.1 γ series ua rau kub qis alumina
Nws cov qauv molecular tuaj yeem sawv cev los ntawm cov qauv tshuaj Al2O3 • nH2O, qhov twg 0<>< 0.6,="" daim="" ntawv="" no="" tsim="" tawm="" ntawm="" qhov="" ntsuas="" dej="" kom="" sov="" tsis="" dhau="" 600="" ℃,="" suav="" nrog="" ρ-,="" χ-,="" η-,="" γ-="" alumina,="" thiab="" cov="" kab="" mob="" crystallization.="" nws="" yog="" qhov="">
2. 2δ series siab alumina
Qhov kev hloov alumina no yog qhov pib ua cov khoom lag luam hu ua molecular tus neeg sawv cev ntawm 800 ° C txog 1000 ° C, suav nrog k-, θ-δ-alumina, thiab lwm yam, uas yog cov crystalline.
2.3. al-alumina
Lub teeb tsa alumina no yog lub cev amorphous, uas tau tsim los ntawm cua kub sai thiab lub cev qhuav dej ntawm gibras. Nws muaj tus cwj pwm tseem ceeb heev: dej ntws tsis txaus
ρ- Al2O3 +6H2O Al2O3.H2O Al2O3.3H2O
Raws li nws cov yam ntxwv ntawm lub cev, ntau ntau yam ntawm cov txheej txheem qhib alumina tuaj yeem npaj, xws li pas nrig, npas, thiab lwm yam.
3. Kev npaj thiab cov khoom ntawm alumina hmoov ua kom tawg
3.1 Kev npaj ntawm alumina hmoov ua kom sov
Activated alumina hmoov yog npaj los ntawm kev sib xyaw aluminium hydroxide, pseudo-boehmite thiab lwm yam aluminium oxide dej nrog cov tshuaj sib txawv thiab tswj cov kev sib txawv calcination.
3.2 Cov yam ntxwv ntawm kev ua haujlwm alumina hmoov
Thaj chaw tshwj xeeb hauv cheeb tsam loj, feem ntau nce mus txog 350m2 / g lossis ntau dua. Lub siab huv ntawm cov khoom tuaj yeem tswj hwm los ntawm tus qauv ntawm kev tswj hwm qhov purity ntawm cov khoom siv raw, thiab pore loj faib cov khoom lag luam tuaj yeem tswj tau los ntawm hom kev sib ntxiv.
Yog tias koj pom Activated alumina hmoov chaw tsim tshuaj paus, peb yog lub Hoobkas tshaj lij. Thov nrhiav peb. Ua tsaug!