MOLECULAR SIEVE 5A
Divalent calcium ion is exchanged in place of sodium cation in -4A crystals which gives oire apertures of -5Ao. 5A molecular sieve exclude molecules of effective diameter >5A0, e.g., all 4-carbon rings, and iso-compounds.
Molecular sieve 5A adsorbs n-paraffin irrespective of chain lenght and not the branched chain hydrocarbon. Hence it is uesed for specific applications like separations of normal from branched chain paraffin. 5A has excellent drying capacity with simultaneously removing other impurities such as carbon dioxide, hydrogen sulfide. Our molecular sieve exhibits high resistance to attrition and physical damage during serivce.
Typical Technical Data
Parameter 5A-S 5A-G
Shape Pellets Beads Pellets Beads
Size (mm) 3.0 & 1.5 0.5 – 6.0* 3.0 & 1.5 0.5 – 6.0*
Bulk Density (kg/lit.) 0.75 – 0.85 0.64 – 0.70
Water Adsorption Capacity @ 15% RH & 300C (%) 19.0 16.0
Water Adsorption Capacity @ 75%RH & 300C (%) 23.5 21.0
Attrition loss / Abrasion loss (%) <0.15 <0.2
Specific Heat (kcal/kg H2O) 0.23
Heat of Adsorption (kcal/kg H2O) 1050
Packing in steel drum (kg) 150-160 125-145
* A set of size can be selected from the above range. E.g 0.5 mm, 1-3 mm, 2-4 mm, 3-5mm etc.
Major Applications: Separation of normal paraffins frombranched-chain and cyclic hydrocarbons; removal of H2S, CO2 and mercaptans from natural gas, inert gas drying and purification (removal of CO2 with simultaneous drying), Recycle gas sweetening (removal of H2S), pretreatment of natural gas-liquification (removal of H2O, CO2, H2S & mercaptans), etc,Molecules adsorbed include nC4H10, nC4H9OH, C3H8 to C22H45, and dichlorodifluoro methane (Freon 12).
Email : chemicals@dubichem.com
