zeolite zsm-5,ZSM-5 molecular sieve
In petrochemistry industry, zeolite zsm-5 molecular sieve is widely used as addition of diesel hydrodewaxing catalyst and fixed bed catalytic cracking catalyst.
zeolite zsm-5 molecular sieve which SiO2/Al2O3 is from 38 to 40.Mostly has been used as an FCC additive for decreasing olefin content in gasoline.
The SiO2/Al2O3 of zeolite ZSM-5 used in residuum catalytic cracking is from 25 to 30.
In chemical industry, zeolite zsm-5 molecular sieve is widely used as selective catalyst, such as: 1,4-diethylbenzene catalyst, xylene isomeric catalyst. In environmental protection, organic matters have been extracted by zeolite zsm-5 which SiO2/Al2O3 is from 220 to 400.
Production index of zeolite zsm-5
1 Chemical composition
SiO2/Al2O3
Na2O(%)
Al2O3(%)
SiO2(%)
25
≤0.1
5-5.5
80-85
38
≤0.1
3.8-3.9
85-86
50
≤0.1
2.-2.6
86-87
Relative crystallinity: Na-ZSM-5≥85% , H- ZSM-5≥95%
Dimension: 4.6Å
Hot stability: 1.81(measured by isooctane)
Hydro-thermal stability: zeolite ZSM-5 is still keeping the structure at 1200℃
Stability: zeolite ZSM-5 is able to keep the structure at 700℃ after water vapor modified
