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208574

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Molecular sieves, 3 Å

beads, 4-8 mesh

Synonym(s):

Molecular Sieve UOP Type 3Å

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1 KG
$155.00
5 KG
$652.00

About This Item

Linear Formula:
KnNa12-n[(AlO2)12(SiO2)12] · xH2O
CAS Number:
308080-99-1
MDL number:
MFCD00147627
UNSPSC Code:
23201100
eCl@ss:
32110204
NACRES:
NB.24

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beads

Quality Level

100

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.[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.

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX5718
MKCX0832
0000377855
MKCW8275
MKCW3497

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Muhammad Naziz Saat et al.
Biotechnology and applied biochemistry, 67(3), 354-365 (2019-11-21)
One-pot synthesis of sugar-functionalized oligomeric caprolactone was carried out by lipase-catalyzed esterification of ε-caprolactone (ECL) with methyl-d-glucopyranoside (MGP) followed by the elongation of functionalized oligomer chain. Functionalization was performed in a custom-fabricated glass reactor equipped with Rushton turbine impeller and
Infrared spectroscopy studies on stability of dimethyl sulfoxide for application in a Li?air battery
Mozhzhukhina N, et al.
The Journal of Physical Chemistry C, 117(36), 18375-18380 (2013)
Chiral phosphoric acid catalyzed enantioselective Friedel-Crafts alkylation of indoles with nitroalkenes: cooperative effect of 3 A molecular sieves.
Junji Itoh et al.
Angewandte Chemie (International ed. in English), 47(21), 4016-4018 (2008-04-18)
Enantioselective total synthesis of ecteinascidin 743.
Corey EJ, et al.
Journal of the American Chemical Society, 118(38), 9202-9203 (1996)
Kenji Kobata et al.
Bioscience, biotechnology, and biochemistry, 66(2), 319-327 (2002-05-10)
Capsinoids are a novel group of compounds produced by the Capsicum plant. We synthesized a capsinoid by the lipase-catalyzed esterification of vanillyl alcohol with fatty acid derivatives in an organic solvent. The use of seven out of 17 commercially available

Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. 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.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. 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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  3. Which molecular sieve should I use to remove water from ethanol

    1 answer

    1. This product and other 3 Å Molecular Sieves are ideal for drying polar liquids such as ethanol. For general use, add molecular sieves at approximately 3 - 4 times the calculated amount of organic solvent and allow to stand for 24 hours with occasional stirring. Please see the link below to review additional information regarding Molecular Sieves:
      https://www.sigmaaldrich.com/technical-documents/technical-article/chemistry-and-synthesis/reaction-design-and-optimization/molecular-sieves

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