Sigma-Aldrich 208574 Molecular sieves, 3 Å beads, 4-8 mesh 5 kg
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Marka
Stok Kodu
LB.SA.208574-5KG
Kısa Bilgi
Synonym(s): Molecular Sieve UOP Type 3Å Linear Formula: KnNa12-n[(AlO2)12(SiO2)12] · xH2O CAS Number: 308080-99-1 MDL number: MFCD00147627 eCl@ss: 32110204 NACRES: NB.24
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Sigma-Aldrich 208574 Molecular sieves, 3 Å beads, 4-8 mesh 5 kg
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Synonym(s): Molecular Sieve UOP Type 3Å
Linear Formula: KnNa12-n[(AlO2)12(SiO2)12] · xH2O
CAS Number: 308080-99-1
MDL number: MFCD00147627
eCl@ss: 32110204
NACRES: NB.24
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PROPERTIES
form beads
Quality Level 100
particle size 4-8 mesh
pore size 3 Å
DESCRIPTION
General description
Molecular sieves are crystalline metal aluminosilicates having a 3-dimensional interconnecting network of silica and alumina tetrahedra. Natural water of hydration is removed from this network by heating to produce uniform cavities which selectively adsorb molecules of a specific size. The 3A form is made by substituting potassium cations for the inherent sodium ions of the 4A structure, reducing the effective pore size to ~3Å, excluding diameter >3Å, e.g., ethane. The 4 to 8-mesh type is normally used in gas-phase applications. Molecular sieves are considered a universal drying agent in polar and nonpolar media.
Application
Molecular sieves have been used for the drying of dimethyl sulfoxide.[1]
They may also be used in the following: Synthesis of ecteinascidin 743 (a potential marine-derived antitumor agent).[2]
Preparation of vanillyl nonanoate (a model capsinoid compound).[3]
Highly enantioselective Friedel-Crafts alkylation of indoles with nitroalkenes.[4]
Molecular sieves, 3 Å may be used in the following processes:
As a general-purpose drying agent in polar and nonpolar media. Commercial dehydration of unsaturated hydrocarbon streams, including cracked gas, propylene, butadiene, acetylene Drying polar liquids such as methanol and ethanol. Adsorption of molecules such as NH3 and H2O from a N2/H2 flow.
Packaging
1 kg in poly bottle
5 kg in fiber drum
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