208574
Molecular sieves, 3 Å
beads, 4-8 mesh
Sinónimos:
Molekularsieb UOP Typ 3A
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About This Item
Fórmula lineal:
KnNa12-n[(AlO2)12(SiO2)12] · xH2O
Número de CAS:
MDL number:
UNSPSC Code:
23201100
eCl@ss:
32110204
NACRES:
NB.24
Productos recomendados
form
beads
particle size
4-8 mesh
pore size
3 Å
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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.
They may also be used in the following:
They may also be used in the following:
- Synthesis of ecteinascidin 743 (a potential marine-derived antitumor agent).
- Preparation of vanillyl nonanoate (a model capsinoid compound).
- Highly enantioselective Friedel-Crafts alkylation of indoles with nitroalkenes.
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.
Storage Class
13 - Non Combustible Solids
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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