These Molecular sieves are used for adsorbing water, for instance removing the water from alcohol or other solvents which cannot be removed by distillation. This material traps the water and does not dissolve. Simply place some of the sieves into your liquid, let it sit for a while and then pour off or filter the liquid.
Molecular sieves are a synthetically manufactured version of Zeolite and feature an intricate network of billions of pores and empty cavities, giving it exceptional adsorbing properties. Molecular sieve has the fastest adsorption rate among desiccants.
Molecular sieves properties as desiccants differ from silica gel in a number of ways :
- They adsorb water vapour more rapidly than silica gel, even capable of drying silica.
- They will reduce water vapour to much lower levels than silica gel, making their use essential when a very dry product or atmosphere is required.
- They perform more effectively as moisture adsorbers at higher temperatures (greater than 25°C) than silica gel does.
- Molecular Sieve 4A has a pore size of 4A or 4 angstrom. Any molecule larger than 4A will not be able to be adsorbed.
The advantages of our 4A molecular sieve are consistently high adsorption speed, and higher contamination resistance, stronger crushing strength, increasing cyclic times which provide an extended product life. 4A Molecular Sieve is primarily for removing moisture from liquefied and gaseous materials.
Applications include:
Refrigerant Drying, Moisture removal in PU Plastic or Paint,Natural Gas Drying, Drying Cracked Gas, Static drying of insulating glass units, whether air filled or gas-filled., Dehydration of highly polar compounds, such as ethanol. Dehydration of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien).
Chemical Composition: 1 Na2O: 1 Al2O3: 2.0 ± 0.1 SiO2 : x H2O
Storage and Shelf Life: Supplied in an active state, the product must be commissioned immediately to maximise lifespan, as water in the air around an open canister will be rapidly adsorbed, exhausting the media.
Store the molecular sieve in a cool location and at bellow <90% humidity.
Product life once commissioned is 3-5 years, unless exhausted by saturation first. It is possible to regenerate Zeolite by baking in an oven at 300c, at which point the moisture level will be reduced to approximately 2%. Then the product must be cooled in a desiccator, this is extremely energy intensive and is most often discarded, and replaced with a fresh Molecular Sieve.