3A Molecular Sieve for Cracked Gas Drying

3A Molecular Sieve for Cracked Gas Drying Pingxiang Petrochemical 3A molecular sieve is used for commercialdehydration of unsaturated hydrocarbon streams as cracked gas, acetylene,propylene,and butadiene. It is also used for dehydration of alcohol and solvents.Physical properties ItemUnitTechnical dataShape Pellet Sphere Diameter Mm1.5-1.7 3.0-3.3 1.7-2.5 3.0-5.0 Size ratio up to grade %≥98 ≥98 ≥96 ≥96 Bulk density g/ml≥0.68 ≥0.68 ≥0.68 ≥0.68 Wear ratio %≤0.2 ≤0.25 ≤0.10 ≤0.10 Crushing strength N≥45/cm ≥60/cm ≥30/piece ≥70/piece Static water adsorption %≥20 ≥20 ≥20 ≥20 Ethylene adsorption %≤3.0 ≤3.0 ≤3.0 ≤3.0 Water content,as shipped %≤1.5 ≤1.5 ≤1.5 ≤1.5 Application 1) Drying of unsaturated hydrocarbons(e.g. ehylene,propylene,butadien) 2) Cracked Gas Drying 3) Drying of natural gas,if COS minimization is essential,or a minimum co-adsorption of hydrocarbons is required. 4) Drying of highly polar compounds,such as methanol and ethanol 5) Drying of liquid alcohol 6) Static,(non-regenerative)dehydration of insulating glass units,whether air filled or gas-filled. Regeneration Molecular sieve Type 3A can be regenerated by either heating in the case of thermal swing processes; or by lowering the pressure n the case of pressure swing processes. To remove moisture from a 3A molecular sieve,a temperature of 200-300.C is required, A poperly regenerated molecular sieve can give moisture dew points below-100.C. The outlet concertrations on a pressure swing process will depend on the gas present, and on the conditions of the process. Size 3A –Zeolites are available in beads of 1-2mm(10*18 mesh),2-3mm(8*12 mesh), 2.5-5mm(4*8mesh) and as powder, and in pellet 1.63. Attention To avoid damp and pre-adsorption of organic before running, or must to be reactivated.