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.
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詳細
モレキュラーシーブは、シリカとアルミナの四面体の3次元相互接続ネットワークで構成されています。これらの結晶性金属アルミノケイ酸塩は、特定のサイズの分子を選択的に吸着する均一な空洞を有しています。4Aモレキュラーシーブの有効孔径は4Åです。
アプリケーション
H2O、H2S、CO2、SO2、C2H4およびC3H6など有効直径が4Åの分子が吸着されます。
法的情報
SYLOSIV is a registered trademark of W.R. Grace & Co.-Conn.
保管分類コード
11 - Combustible Solids
WGK
WGK 3
引火点(°F)
Not applicable
引火点(℃)
Not applicable
適用法令
試験研究用途を考慮した関連法令を主に挙げております。化学物質以外については、一部の情報のみ提供しています。 製品を安全かつ合法的に使用することは、使用者の義務です。最新情報により修正される場合があります。WEBの反映には時間を要することがあるため、適宜SDSをご参照ください。
Jan Code
688363-25G:
688363-1KG:
688363-2.5KG:
688363-VAR:
688363-BULK:
688363-500G:
最新バージョンのいずれかを選択してください：
試験成績書（COA）
Lot/Batch Number
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What is the CEC for this zeolite? specifically for Ca2+ and Mg2+?
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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.pdf役に立ちましたか？
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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-sieves役に立ちましたか？
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