Txheej txheem cej luam ntawm activated alumina
Activated alumina, tseem hu ua activated bauxite, hu ua activated alumina hauv lus Askiv. Alumina siv hauv catalysts feem ntau hu ua "activated alumina". Nws yog ib qho ntxeem tau, cov khoom tawg yooj yim heev nrog thaj tsam loj. Nws cov microporous nto muaj cov yam ntxwv xav tau rau catalysis, xws li adsorption kev ua tau zoo, kev ua haujlwm saum npoo, zoo thermal stability, thiab lwm yam, yog li nws yog dav siv los ua catalyst thiab catalyst cab kuj rau cov tshuaj tiv thaiv.
Lub spherical activated alumina siab viav vias roj adsorbent yog dawb kheej kheej porous hais. Lub tshuab ua kom muaj alumina muaj qhov loj me me, du nto, muaj zog txhua yam, muaj zog hygroscopicity, tsis o thiab tawg tom qab dej nqus, thiab tseem tsis hloov. Nws yog non-toxic, tsw, thiab insoluble hauv dej thiab ethanol.
Alumina
Nws yog insoluble nyob rau hauv dej thiab maj mam yaj nyob rau hauv concentrated sulfuric acid. Nws tuaj yeem siv los ua kom zoo hlau txhuas thiab tseem yog cov khoom siv raw rau kev ua crucibles, porcelain, cov ntaub ntawv refractory thiab cov gemstones.
Alumina siv los ua adsorbent, catalyst thiab catalyst cab kuj hu ua "activated alumina". Nws muaj cov yam ntxwv ntawm porosity, siab dispersion thiab loj tshwj xeeb nto. Nws yog dav siv hauv kev kho dej, petrochemical, tshuaj lom neeg, tshuaj lom neeg thiab tshuaj lom neeg.
Cov yam ntxwv ntawm alumina
1. Loj qhov chaw tshwj xeeb: qhib alumina muaj qhov tshwj xeeb ntawm thaj chaw siab. Los ntawm kev tswj hwm lub sintering system ntawm alumina, activated alumina nrog ib tug tshwj xeeb deg cheeb tsam siab li 360m2 / G tuaj yeem npaj. Lub activated alumina npaj los ntawm kev siv colloidal aluminium hydroxide decomposed los ntawm NaAlO2 raws li raw khoom muaj ib tug me me pore loj thiab ib tug tshwj xeeb deg cheeb tsam siab li 600m2 / g.
2. Adjustable pore loj qauv: Feem ntau hais lus, cov khoom nrog nruab nrab pore loj tuaj yeem npaj tau los ntawm kev ci nrog cov ntshiab aluminium hydroxide. Cov khoom me me pore loj tuaj yeem npaj tau los ntawm kev npaj ua kom muaj alumina nrog txhuas kua nplaum, thiab lwm yam thaum lub qhov pore loj qhib alumina tuaj yeem npaj tau los ntawm kev ntxiv qee cov organic, xws li ethylene glycol thiab fiber ntau, tom qab combustion.
3. Qhov saum npoo yog acidic thiab muaj thermal stability zoo.
Kev ua haujlwm ntawm activated alumina
Activated alumina belongs rau qeb ntawm tshuaj alumina, uas yog siv los ua adsorbent, dej purifier, catalyst thiab catalyst cab kuj. Activated alumina muaj peev xwm xaiv adsorb dej hauv cov pa roj, dej vapor thiab qee cov kua dej. Tom qab cov adsorption yog saturated, nws tuaj yeem ua kom sov li ntawm 175-315. D egree. Adsorption thiab reactivation tuaj yeem ua tau ntau zaus.
Ntxiv nrog rau kev siv cov desiccant, nws tseem tuaj yeem nqus cov roj lubricating vapor los ntawm cov pa paug paug, hydrogen, carbon dioxide, nkev roj, thiab lwm yam. Thiab tuaj yeem siv los ua catalyst thiab catalyst kev txhawb nqa thiab kev txhawb nqa rau chromatographic tsom xam.
Nws tuaj yeem siv los ua tus neeg sawv cev defluorinating rau cov dej haus fluorine siab (nrog lub peev xwm loj defluorinating), tus neeg sawv cev defluorinating rau kev ncig alkanes hauv kev tsim cov alkylbenzene, deacidifying thiab regenerating tus neeg sawv cev rau cov roj transformer, ib tug qhuav tus neeg sawv cev rau cov pa roj hauv kev lag luam oxygen. , textile kev lag luam thiab hluav taws xob kev lag luam, lub tshuab ziab khaub ncaws rau huab cua tsis siv neeg, thiab cov tshuab ziab khaub ncaws thiab cov purifying tus neeg sawv cev hauv cov tshuaj chiv, petrochemical ziab thiab lwm yam lag luam.
Post lub sij hawm: Jun-01-2022
