| Identification | Back Directory | [Name]
MOLECULAR SIEVES | [CAS]
308080-99-1 | [Synonyms]
S 136
3 Å
Purmol 3A
Tricat 3A
FAUJASITE
Zeolite 3A
Zeolum A 3
UOP-AS 5078
Purmol 3STH
Siliporite 3A
MOLECULAR SIEVE
MOLECULAR SIEVES
dowex 50wx4-200
dowex 50wx4-400
Siliporite NK 30
Siliporite NK 30AP
3A Molecular Sieves
molecular sieves,3А
MOLECULAR SIEVES 3A
MOLECULAR SIEVES 3D
MOLECULAR SIEVES, 4A
MOLECULAR SIEVES, A4
MOLECULAR SIEVES, 5A
MOLECULAR SIEVES, 13X
MOLECULAR SIEVES 4A 1/8
MOLECULAR SIEVES 5A 1/8
MOLECULAR SIEVE 3A 1/16
MOLECULAR SIEVE 4A 1/16
MOLECULAR SIEVE 5A 1/16
MOLECULAR SIEVES 3A 1/8
MOLECULAR SIEVES 13X 1/8
MOLECULAR SIEVES 3A 1/16
MOLECULAR SIEVES 5A 1/16
MOLECULAR SIEVE 13X 1/16
MOLECULAR SIEVES PACK 3A
MOLECULAR SIEVES 4A 1/16
Molecular sieves, 3A, 3A
MOLECULAR SIEVES 13X 1/16
Molecular sieves, 3 Å
MOLECULAR SIEVES, TYPE 13 X
molecular sieve uop type 3А
Molecular sieves, UOP Type 3?
Molecular Sieve UOP Type 3Å
Molecular sieves 3A, 4 to 8 mesh
Molecular sieves, 3 , 4 - 8 Mesh
Molecular sieves 3A,powder <50 μm
Molecular sieves 3A, 8 to 12 mesh
Molecular Sieves 3A, with indicator
Molecular sieves, 3 pellets, 1.6 mm
Molecular sieves, 3 pellets, 3.2 mm
Molecular Sieves 3A, mixed indicator
Molecular sieves 3A, 4 to 8 Mesh 5KG
Molecular sieves, 3 beads, 4-8 mesh
Molecular sieves, 3 beads, 8-12 mesh
Molecular sieves 3A, 8 to 12 Mesh 5KG
Molecular sieves 3A, 4 to 8 Mesh 500GR
MOLECULAR SIEVE UOP TYPE 3A 1/8''-RODS
Molecular sieves 3A, powder <50 micron
Molecular sieve, Type 4A with indicator
MOLECULAR SIEVES 3 ANGSTROM*1/16IN PELLE T
Molecular sieves 3A, powder <50 Micron 500GR
Molecular sieve, Type Y, ammonium ion, powder
Molecular sieves, 3A, 1-2MM (0.04-0.08in) beads
Molecular sieves, 3A, 3-5MM (0.12-0.20in) beads
Molecular sieves, 3 ,Molecular Sieve UOP Type 3
Molecular sieve, Type Y, ammonium ion, extrusions
Molecular sieves, 3A, 1/8in (3-4mm) diam. pellets
Molecular sieves, 3A, 1/16in (1-2mm) diam. pellets
Molecular sieves, 3A, 0.4-0.8MM (0.02-0.03in) beads
Molecular sieves, 3A, 3-4MM (0.12-0.16in) dia. pellets
Molecular sieves, 3A, 1-2MM (0.04-0.08in) dia. pellets
Molecular sieves, 3A, 1 to 2mm (0.04 to 0.08 in) beads
Molecular sieves, 3A, 3 to 5mm (0.12 to 0.20 in) beads
Molecular sieves, 3A, 0.4 to 0.8mm (0.02 to 0.03 in) beads
Molecular sieves 3A, 1 to 2mm (0.04 to 0.08 in.) dia. pellets
Molecular sieves 3A, 3 to 4mm (0.12 to 0.16 in.) dia. pellets
Molecular sieves powder, Catalyst support, ammonium Y zeolite
Molecular sieve, niobium oxide based, mesoporous, 22 Angstrom
Molecular sieve, niobium oxide based, mesoporous, 32 Angstrom
Molecular sieve, titanium oxide based, mesoporous, 25 Angstrom
Molecular sieve, tantalum oxide based, mesoporous, 22 Angstrom
Molecular sieve, tantalum oxide based, mesoporous, 32 Angstrom
Molecular sieve, sulfated zirconium oxide based, mesoporous, 23 Angstrom
Molecular sieve, sulfated zirconium oxide based, mesoporous, 18 Angstrom | [Molecular Formula]
KnNa12-n[(AlO2)12(SiO2)12]xH2O | [MDL Number]
MFCD00164506 |
| Hazard Information | Back Directory | [Chemical Properties]
white powder | [Uses]
Molecular sieve 3A 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.
| [Uses]
Molecular sieves, 3A is used as desiccant in petroleum and chemical industries. It is useful for the drying of unsaturated hydrocarbons such as ethylene, propylene and butadiene. It is also used in the removal of water from ethanol. It finds application in the drying of certain chemicals namely ethanol, refrigerants and natural gas. It plays an important role as selective adsorption of water in insulated glass (IG) and polyurethane. It has been considered as a general-purpose drying agent in polar and non polar media. | [Application]
Molecular sieve 3A is mainly used for drying of unsaturated hydrocarbons such as petroleum cracked gas, ethylene, butadiene; drying of polar liquids such as methanol and ethanol, drying of refrigerants; deep drying of kerosene and aero-engines; drying of nitrogen-hydrogen mixed gas . Desiccant for petrochemical, vacuum glass and other industries. | [Definition]
Porous crystallinesubstances, especially aluminosilicates(see zeolite), that can be dehydratedwith little change in crystalstructure. As they form regularlyspaced cavities, they provide a highsurface area for the adsorption ofsmaller molecules.
The general formula of these substancesis MnO.Al2O3.xSiO2.yH2O,where M is a metal ion and n is twicethe reciprocal of its valency. Molecularsieves are used as drying agentsand in the separation and purificationof fluids. They can also be loadedwith chemical substances, which remainseparated from any reactionthat is taking place around them,until they are released by heating orby displacement with a morestrongly adsorbed substance. Theycan thus be used as cation exchangemediums and as catalysts and catalystsupports. They are also used asthe stationary phase in certain typesof chromatography (molecular-sievechromatography). | [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 ~3?, excluding diameter >3?, 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. | [Structure and conformation]
The general formula of the chemical composition of molecular sieve is: (Mn+)2/nO·Al2O3·xSiO2·pH2O, M represents metal ion (usually Na in artificial synthesis), n represents the valence of metal ion, and x represents the number of moles of SiO2, also known as is the ratio of silicon to aluminum, and p represents the number of moles of water. The most basic structure of the molecular sieve framework is SiO4 and AlO4 tetrahedron, which form a crystal of a three-dimensional network structure through the combination of shared oxygen atoms. This combination forms the holes and channels with molecular level and uniform pore size. Due to different structures and forms, the "cage"-shaped spatial pores are divided into "cage" structures such as α, β, γ, hexagonal columns, and faujasite. |
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