ID：BK2020110706
CAS：
price： $180
Item ID：BK2020110706-04
specification：
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Structural characteristics of MCM-22 molecular sieve
MCM-22 molecular sieve has two sets of non-interconnected multi-dimensional channel systems. One set is a two-dimensional sinusoidal channel with an effective aperture of (0.4nmX0.59nm), and the other set is composed of a supercage (0.71nmX0.71mX 1.82nm) containing a twelve-membered ring, and its opening is also a ten-membered ring.
MCM-22 molecular sieve is slightly smaller than β zeolite, which is also a twelve-membered ring (the linear channel pore size is about 0.57nmX0.75nm, and the nonlinear tortuous channel pore size is about 0.56nmX0.65nm). Therefore, MCM-22 molecular sieve has better selectivity for certain reactions. For example, when benzene is alkylated with ethylene and propylene to produce styrene and cumene, the by-products of diethylbenzene and dicumyl -22 molecular sieve is blocked in the ten-membered ring channel, and has high selectivity. The MCM-22 molecular sieve has a larger pore volume than the ten-membered ZSM-5. When more branched hydrocarbon isomers participate in the reaction, its entry into the ZSM-5 ten-membered ring pores is blocked. However, MCM- The twelve-membered ring channel of 22 molecular sieve is unblocked for multi-branched compounds, and more I-Cs will be formed. In addition, the difference in the diffusion properties of different molecules also reflects its shape selectivity.
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| Item ID | CAS | ID | Pack | Parameter | Stock | Make up | Price |
| BK2020110706-01 | BK2020110706 | 20g | SiO2/Al2O3=25;比表面积约450m2/g | 100 | $43 | ||
| BK2020110706-02 | BK2020110706 | 30g | SiO2/Al2O3=25;比表面积约450m2/g | 100 | $60 | ||
| BK2020110706-03 | BK2020110706 | 50g | SiO2/Al2O3=25;比表面积约450m2/g | 100 | $95 | ||
| BK2020110706-04 | BK2020110706 | 100g | SiO2/Al2O3=25;比表面积约450m2/g | 100 | $180 |
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