2017 New Style Molecular Sieve Chemical - Molecular Sieve ZSM – Ton Year

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2017 New Style Molecular Sieve Chemical - Molecular Sieve ZSM – Ton Year Detail:

ZSM-5 type zeolite, belonging high-silica zeolite and having a Si/Al ratio of up to 1000 and above, also shows the hydrophobic characteristic. The structure feature of such a zeolite is that the vertical and horizontal parts are crystalline alum inosilicate composed of 10-membered channel. The basic structure is composed of eight 5-membered rings, which has channels only and is without cage-free cavities. ZSM-5 has two sets of cross channels, one of which is ellipse, and the window diameter thereof is 0.55 to 0.60nm. As the reaction space is similar to the shape of the access, the zeolite has a shape selection effect to the reactants and products. Moreover, ZSM-5 is a good raw material of selective catalyst due to the harmonious structure and hydrothermal stability.

ZSM-5 type zeolite is widely applied to petrochemical processing industries, applied to the fluidifying, catalyzing and cracking process as an assistant for producing more propylene and liquefied gas, and improving the octane number of the gasoline. In addition, the zeolite can be applied to the production of ethylbenzene, xylene, phenol, pyridine, etc.

Application:
1.ZSM – 5 molecular sieve used for FCC catalyst: conventional SiO2 / Al2O3 ratio is between 40 to 50.
2.ZSM – 5 molecular sieve used for FCC gasoline additives to reduce the olefin: conventional SiO2 / Al2O3 ratio is between 38 to 40.
3.ZSM – 5 molecular sieve used for resid catalytic cracking: conventional SiO2 / Al2O3 ratio is between 25 to 30.
4.ZSM – 5 molecular sieves in chemical industry, fine chemical industry is widely used in shape-selective catalysis, such as diethylbenzene catalyst, xylene isomerization catalyst, ethyl acetate, ethylene glycol, ethylene glycol butyl ether of catalyst has a wide range of uses.

Technic date:

Item	Unit	Min	Typical	Max	Analytical Method
Relative crystallinity	%	90	93		X-ray diffractometer
Total specific surface	m²/g	320	360		Adsorption
Microporous specific surface	m²/g	270	280		Adsorption
Silica-alumina ratio	/	25	27.5	30	XRP
Na₂O	wt%		0.04	0.1	Flame Photometric Analysis
SO₄²	wt%		0.20	0.4	XRP
Cl-	ppm			70	Chemical Analysis
LOI	wt%			10	Gravimetric Analysis
D,50	μm		6	9	Lase Scatter Distribution
D,90	μm		9.0	15	Laser Scatter Distribution
>100μm			0	0.06	Laser Scatter Distribution

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