Pseudo-boehmite (PB hmoov rau luv luv, siv cov mis alooh2o, n}}}}}}}}}} {}} nws yog ib hom ntawm Boehmite nrog tsis tiav crystallinity. Nws muaj cov yam ntxwv ntawm thaj chaw siab tshwj xeeb, zoo colloidal solubility, muaj zog adhesion, thiab loj poreVolume . Nws yog cov khoom siv raw tshuaj raw thiab tsis muaj ntxhiab, feem ntau tshwm sim hauv daim ntawv ntawm dawb colloid(Cov khoom ntub) lossis hmoov (cov khoom qhuav) .
Pseudo-boohmite tuaj yeem hloov mus rau hauv -al2O3 tom qab ua lub luag haujlwm caturaltic, tab sis kuj tuaj yeem siv los ua cov tshuaj tua kab kom tsis txhob muaj kua mis qhuav rau Olfins . Thaum muaj pseudo-boehmite los rau hauv kev sib cuag nrog acid, ib qho kev tawm tsamtshwm sim, ua rau ib qho sol prenomenon . Cov khoom zoo nkauj thiab nws cov khoom siv ua kom zoo dua qub, bioceramics, lossis ua kom muaj txiaj ntsig zoo thiab tsis muaj tshuaj lom nplaim taws retardants {5 5}}
{. pseudo-boehmite yog qhov zoo sib tw rau catalysts
1. Controlable qauv thiab siab porosity, xws li tuaj yeem hloov kho cov khoom siv hydroxyl, thiab tuaj yeem hloov kho cov cuab yeej loj (xws li hlau, hlau oxides thiab hlau sulfides) nyob rau hauv daim ntawv ntawm nanoparticles, yog li ua kom muaj kev tawg siab thiab zoo heev ntawm catalyst.
2. peptization zoo thiab muaj zog} Kuv yog qhov haum rau cov txheej txheem catalyst no tsuas yog ua kom muaj zog ntawm cov txheej txheem catalyst, tab sis kuj tseem ua kom muaj zog ntxiv rau ntau yam tshuaj tua hluav taws xob xws li kev zam, tshuaj ntsuab, thiabpelletizing, thiab tuaj yeem npaj catalysts hauv ntau yam duab xws li spherical, conterical, thiab honeycomb li .
2.} Daim ntawv thov ntawm Pseudo-Boehmite hauv kev lag luam catalyst kev lag luam
1. catalyst cov cab kuj
Hauv kev lag luam roj av, -al2o3 yog siv los ua cov cab kuj catalysts thiab lub cev qhuav dej los yog cov khoom siv hluav taws xob ntau dua los yog ua kom muaj qhov sib piv nrog boehmite, pseudo-boehmite muaj a Qhov ntau dua cov cheeb tsam thiab muaj kev sib txawv ntawm cov kev ua kom muaj zog, thiab yog li cov khoom siv sib txawv ntawm cov khoom siv catalystic thiab tseem siv tau los ua cov phau ntawv los txhim kho cov ris tsho tiv no ntawm cov Catalyst {13.} Yog li ntawd, nyob rau hauv lub petrochemical kev lag luam, pseudo-boehmite feem ntau siv los ua ib tug precursor los npaj -al2o3.
2.} catalyst phau ntawv
Nyob rau hauv cov lus sib xyaw ua ke, ntxiv rau molecular siyeves thiab acidized pareudo-boehmite)}} Ua raws li cov cab kuj los kho cov qauv pore acid thiab acidity ntawm catalyst, yog li cuam tshuam rau cov kev ua si ntawm catalyst {8} {8}
{{0 {}} Kev Npaj ntawm Gamma Alumina Txheej Txheej
Txheej txheej txheej ntawm cov txheej txheem muaj cov khoom siv hluav taws xob tshwj xeeb yog qhov kev faib tawm ntawm cov txheej txheem ntawm cov txheej txheem imprise.}. Feem ntau, cov txheej txheem ua ntej ntawm GAMMA alumina txheej yog alooh sol, uas tau npaj los ntawm cov ntaub ntawv acid peptization siv pepthismite li cov khoom siv raw {}Cov qauv no yooj yim nyob rau hauv cov txheej txheem thiab yooj yim los tswj, thiab yog haum rau kev lag luam lag luam .
Los ntawm cov ntsiab lus saum toj no, peb tuaj yeem pom qhov ntawdpseudo-boehmiteyog cov qauv tseem ceeb ntawm ntau yam kev lag luam catalysts thiab kev lag luam tseem ceeb tshaj plaws, tab sis nws yog hu ua "kev lag luam catalyst {}}