The cation exchange capacity (CEC) of 4A molecular sieves is generally low, as these materials are primarily designed for adsorption and separation processes rather than for ion exchange. Typically, the CEC for 4A molecular sieves is around 0.1 to 0.5 meq/g. This capacity may vary depending on the specific formulation and conditions of the molecular sieve and in this case, it is not a tested parameter.
688363
Molecular sieves, 4 Å
powder, activated, −325 mesh particle size
Sinônimo(s):
SYLOSIV® A4, Sodium Alumino-Silicate
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25 G
R$ 278,00
500 G
R$ 539,00
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R$ 897,00
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R$ 1.866,00
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25 G
R$ 278,00
500 G
R$ 539,00
1 KG
R$ 897,00
2.5 KG
R$ 1.866,00
About This Item
Fórmula linear:
Na12[(AlO2)12(SiO2)12] · xH2O
Número CAS:
Número MDL:
Código UNSPSC:
23201100
eCl@ss:
32110204
NACRES:
NA.21
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Descrição geral
Molecular sieves are made up of three dimensional interconnecting networks of silica and alumina tetrahedral. These crystalline metal aluminosilicates have uniform cavities to selectively adsorb specific size molecules. A 4A molecular sieve has an effective pore size of 4Å.
Aplicação
Molecules with an effective diameter of 4 Å, including H2O, H2S, CO2, SO2, C2H4 and C3H6 are adsorbed.
Informações legais
SYLOSIV is a registered trademark of W.R. Grace & Co.-Conn.
Código de classe de armazenamento
11 - Combustible Solids
Classe de risco de água (WGK)
WGK 3
Ponto de fulgor (°F)
Not applicable
Ponto de fulgor (°C)
Not applicable
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How can I determine the shelf life / expiration / retest date of this product?
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If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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Hi, I am planning to buy Molecular sieves, 4 Å, product number 688363. As the product information says that this one is activated. Does this mean I can use it without any treatment to remove my solvent water?
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Yes, this item is a ready-to-use product. No treatment is required before use.
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what is the effective protocol to use molecular sieve and recycle
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Please see the link below for general information, including regeneration, for molecular sieves:
https://www.sigmaaldrich.com/technical-documents/technical-article/chemistry-and-synthesis/reaction-design-and-optimization/molecular-sievesHelpful?
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