Cov lus qhia luv luv rau molecular sieves
Oct 21, 2021
Ib qho hluavtaws hydrated aluminosilicate (zeolite) los yog ntuj zeolite nrog kev ua haujlwm ntawm kev tshuaj xyuas cov molecules. Nws cov tshuaj formula yog (M' 2M)O·Al2O3·xSiO2·yH2O, thiab M' thiab M yog monovalent thiab divalent cations xws li K{{7}}, Na{{ 8}} thiab Ca2+, Ba2+, thiab lwm yam. Nws muaj ntau lub qhov hws nrog cov pore loj thiab cov pores zoo sib xws hauv nws cov qauv. Molecular sieves nrog qhov sib txawv pore loj cais cov molecules ntawm qhov sib txawv thiab cov duab. Raws li qhov sib txawv molecular ratios ntawm SiO2 thiab Al2O3, molecular sieves nrog txawv pore qhov ntau thiab tsawg tuaj yeem tau. Nws cov qauv yog: 3A (poov tshuaj A hom), 4A (sodium A hom), 5A (calcium A hom), 10Z (calcium Z hom), 13Z (sodium Z hom), Y (sodium Y hom), sodium mordenite hom Tos . Nws muaj peev xwm adsorption siab, muaj zog xaiv thiab kub tsis kam. Nws yog dav siv nyob rau hauv cov organic chemical kev lag luam thiab petrochemical kev lag luam, thiab kuj yog ib tug zoo heev adsorbent rau roj dehydration. Kev mloog ntau ntxiv kuj tau them rau cov pa purification.
