Yuav siv 4A molecular sieve li cas?Cov kev cai rau ib puag ncig uas nws ua haujlwm yog dab tsi?Raws li cov khoom ntxeem tau, 4A molecular sieve yog dav siv nyob rau hauv ntau lub teb vim hais tias ntawm nws cov microporous molecular sieve li adsorption cais cov khoom, ion pauv khoom thiab catalytic khoom.
Ua ntej, cia peb saib cov kev taw qhia ntawm 4A molecular sieve:
Vim tias nws qhov pore loj loj yog 0.4nm, nws yog hu ua 4A molecular sieve, uas tuaj yeem nqus cov tshuaj tsis muaj molecular xws li dej, methanol, ethanol, carbon dioxide, ethylene, sulfur dioxide, hydrogen sulfide, thiab propylene.
- 1. Molecular loj ntawm txoj kev siv 4A molecular sieve
Vim tias nws qhov pore loj yog 0.4 hli, nws tsis tuaj yeem adsorb ib qho molecule (xws li propane) nrog ib txoj kab uas hla loj dua 0.4 hli, tab sis nws cov kev xaiv adsorption kev ua tau zoo rau cov dej yog siab dua lwm cov molecule, thiab nws yog ib qho ntawm feem ntau siv molecular. sieve ntau yam hauv kev lag luam.
- Kev khiav hauj lwm ib puag ncig ntawm txoj kev siv 4A molecular sieve
1. Thaum qhov kub thiab txias yog 110 ° C, nws tuaj yeem evaporate cov dej hauv qhov chaw loj, tab sis nws yuav tsis tsav cov dej hauv qhov pores ntawm molecular sieve.Yog li ntawd, hauv chav kuaj, nws tuaj yeem qhib thiab lub cev qhuav dej los ntawm kev ziab hauv lub qhov cub muffle.Qhov kub yog 350 ° C, thiab nws qhuav nyob rau hauv ib txwm siab rau 8 teev (yog tias muaj lub tshuab nqus tsev twj, nws tuaj yeem qhuav ntawm 150 ° C rau 5 teev).
2. Lub tshuab hluav taws xob 4A molecular sieve yog txias rau li 200 ° C (kwv yees li 2 feeb) hauv huab cua, thiab yuav tsum tau muab cia rau hauv lub tshuab desiccator tam sim ntawd.
3. Nyob rau hauv ib cheeb tsam uas tau tso cai, kev tiv thaiv nitrogen qhuav yuav tsum tau siv thaum lub sij hawm txias thiab khaws cia, uas tuaj yeem tiv thaiv cov dej vapor hauv huab cua kom tsis txhob raug adsorbed dua.Vim hais tias cov qub molecular sieve tom qab siv muaj cov kab mob, nws yuav tsum tsis txhob tsuas yog qhib rau ntawm qhov kub ntawm 450 ° C, tab sis kuj muaj dej vapor los yog inert gas (nitrogen, thiab lwm yam) yuav tsum tau qhia los hloov lwm yam khoom nyob rau hauv lub molecular sieve.
4. Tsis txhob siv roj thiab kua dej thaum siv, thiab sim zam kev sib cuag nrog cov roj thiab cov dej ua kua.
Raws li alkali hlau aluminosilicate, 4A molecular sieve yog nyiam los ntawm ntau cov neeg muas zaub nyob rau hauv qhuav ntawm cov roj thiab kua, thiab kuj yuav siv tau rau refining thiab purification ntawm roj los yog kua, xws li extraction ntawm argon.Tam sim no, koj puas nkag siab txog kev ceev faj rau nws siv?
Tshawb nrhiav kev paub ntxiv molecular sieve:
Tsab ntawv xov xwm no tshwm sim thawj zaug https://www.kelleychempacking.com/news/adsorption-performance-of-4a-molecular-sieve-for-h%e2%82%82s/
https://www.kelleychempacking.com/news/2-tips-to-extend-the-life-of-molecular-sieves/
Tsab ntawv xov xwm no tshwm sim thawj zaug https://www.kelleychempacking.com/news/korean-customer-inspected-the-production-schedule-of-80-tons-of-molecular-sieve/
Post lub sij hawm: Nov-04-2022