Acuro Organics Limited

Appearing as small opaque pinkish beads,molecular sieves are highly porous crystalline metal-alumino silicates. Compared with other desiccants, the distinctive feature is the uniformity pore size in the crystal-lattice structure which is part of the manufacturing process. As the pore size on molecular sieve particles is controlled, it allows the end product to be more precise then other desiccants so different pore sizes can be found, each one with a few different properties. Absorption will occur only for molecules with smaller diameters than the molecular sieves’ pore size larger molecules being excluded from absorption. Preferentially absorbed are molecules of greater polarity which makes molecular sieve ideal for absorption of water from liquids and gases as water molecules are both polar and very small. Molecular sieve is classified by its pore size in angstroms, some of the most used being 3A, 4A, 5A, 8A (10X) and 10A, also known as 13X. This feature allows the selection of a molecular sieve which can absorb water yet exclude most of other molecules or other desiccants which will absorb bigger molecules like aromatics or carbon dioxides. Molecular sieve absorbs up to 22% of its own weight and can hold moisture to temperatures well past 450°F (230°C), and because of its high affinity for moisture, molecular sieve is able to bring the relative humidity in packages down as low as 10% RH.

Applications:

1. Dehydration of many kinds of liquids (say Ethanol).
2. Dehydration of air.
3. Dehydration of Refrigerant.
4. Dehydration of natural gas or methane.
5. Dehydration of cracked gas, ethylene, ethyne, propylene or butadiene