Molecular Sieve (NKF-5) Description
The crystal structure of NKF-5 molecular sieve is composed of silicon, aluminum, and oxygen tetrahedrons. The silicon, aluminum, and oxygen tetrahedrons form a five-membered ring of silicon and aluminum, and eight five-membered rings form the basic structural unit of the NKF-5 molecular sieve. The pore structure of NKF-5 molecular sieve is formed by the intersection of straight cylindrical pores (0.54x0.56nm)with elliptical cross-section and Z-shaped pores (0.52x0.58nm) with an approximately circular cross-section.
Molecular Sieve (NKF-5) Specifications
- Chemical Composition
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(SiO2/Al2O3)=25
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(SiO2/Al2O3)=38
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(SiO2/Al2O3)=50
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Al2O3
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5.0-5.5%
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3.8-3.9%
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2.3-2.5%
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SiO2
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80.0-85.0%
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85.0-86.0%
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86.0-87.0%
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- Adsorption Capacity
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Adsorbent
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N-hexane
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Cyclohexane
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Water
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(SiO2/Al2O3)=25
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9.5-10.5%
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2.1-2.5%
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11.0-12.0%
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(SiO2/Al2O3)=38
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9.5-10.5%
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1.9-2.3%
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9.0-10.0%
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(SiO2/Al2O3)=50
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9.0-10.0%
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1.5-2.0%
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7.0-8.0%
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- Structural state and characteristics
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Pore Size
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5Å
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Skeleton Density
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1.81
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Pore Size
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5Å
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Specific Surface area
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420m2/g
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Relative Crystallinity
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≥95%
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Content (Na2O)
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≤0.1%
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Thermal Stability
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The crystal structure remains unchanged after calcination at 1200°C
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Hydrothermal Stability
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700℃ steam treatment, molecular sieve maintains its structure
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Acid Resistance
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Withstand various acids except hydrofluoric acid
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Molecular Sieve (NKF-5) Applications
- The main components of propylene production increase additives
- Widely used in shape-selective catalysis in the chemical industry
- Adsorption and extraction of organic matter in water in terms of environmental protection
- Catalyst for low-hydrocarbon alkylation, isomerization, and aromatization
- Esterification catalyst
- Hydration catalyst
- Etherification catalyst
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