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| | MOLECULAR SIEVES PACK 4A Basic information |
| Product Name: | MOLECULAR SIEVES PACK 4A | | Synonyms: | Molecular sieves, 4 powder, activated, -325 mesh particle size;Molecular sieves, 4, 1-2mm beads;Molecular Sieves 4A, mixed indicator;Molecular Sieves 4A, with indicator;Molecular sieves 4A, 3 to 4mm (0.12 to 0.16 in.) dia. pellets;Molecular sieves 4A with indicator, ?8+12 (≈: 2mm) beads;Molecular sieves, 4A, 3 to 5mm (0.12 to 0.20 in) beads;Molecular sieves 4A, 1 to 2mm (0.04 to 0.08 in.) dia. pellets | | CAS: | 70955-01-0 | | MF: | Na12(AlO2)12(SiO2)12.xH2O | | MW: | 1704.65 | | EINECS: | | | Product Categories: | | | Mol File: | 70955-01-0.mol |  |
| | MOLECULAR SIEVES PACK 4A Chemical Properties |
| storage temp. | Sealed in dry,Room Temperature | | form | beads | | color | White to Light Brown | | Water Solubility | Insoluble in cold water, hot water, methanol, diethyl ether, n-octanol and acetone. | | Hydrolytic Sensitivity | 5: forms reversible hydrate | | Sensitive | Hygroscopic | | Stability: | Stable. Incompatible with strong acids, strong bases. Hygroscopic. | | CAS DataBase Reference | 70955-01-0 |
| | MOLECULAR SIEVES PACK 4A Usage And Synthesis |
| Chemical Properties | Beads | | Uses | Molecular sieves, 4 ? is used to absorb molecules as large as butane. It is utilized for the separation of natural gas, liquified petroleum gas (LPG) and alkenes. It finds application in the refining and purification of liquid and gases. It is also used for drying and purification of air, inert gases and solvents. It is actively involved to remove methanol, carbon dioxide and ammonia from fluid streams. It plays a vital role to remove heavy metal ions available in water. It is also used as a soap forming agent and as a detergent auxiliary. It has been considered as a general-purpose drying agent in polar and non polar media. | | General Description | Choosing a Molecular Sieve:
1. The preferential adsorption of one molecule over another depends upon pore diameter and mesh size.
2. The dynamic capacity of the silica gel for adsorbing a particular compound is governed by the internal surface area; the greater the surface area, the greater the dynamic capacity.
3. Rate of adsorption and sharpness of resolution are dependent chiefly on particle size and column packing; a fine particle size gives optimum sharpness of resolution.
4. Liquids are most readily adsorbed from solvents in which they are least soluble; a good solvent makes a good desorbing agent.
5. Highly polar liquids are readily adsorbed. Compounds having hydroxyl groups, or containing oxygen are strongly adsorbed.
6. For similar compounds, the higher the molecular weight the higher the selectivity.
7. For hydrocarbons of similar molecular weight, adsorptivity increases with the number of double bonds. |
| | MOLECULAR SIEVES PACK 4A Preparation Products And Raw materials |
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