3Å Molecular Sieves (zeolite) - CAS# 308080-99-1 - ACS Grade
Description
3Å molecular sieves do not adsorb molecules whose diameters are larger than 3Å. The characteristics of these molecular sieves include fast adsorption speed, frequent regeneration ability, good crushing resistance and pollution resistance. These features can improve both the efficiency and lifetime of the sieve. 3Å molecular sieves are the necessary desiccant in petroleum and chemical industries for refining oil, polymerization, and chemical gas-liquid depth drying. 3Å molecular sieves are used to dry a range of materials, such as ethanol, air, refrigerants, natural gas and unsaturated hydrocarbons. The latter include cracking gas, acetylene, ethylene, propylene and butadiene. 3Å molecular sieves are utilized to remove water from ethanol, which can later be used directly as a bio-fuel or indirectly to produce various products such as chemicals, foods, pharmaceuticals, and more. Once the beads are full of water, they can be regenerated for further use by a range of methods including pressure change (as in oxygen concentrators), heating and purging with a carrier gas (as when used in ethanol dehydration), or heating under high vacuum. Regeneration temperatures range from 175 °C to 315 °C depending on molecular sieve type.
3Å molecular sieves should be stored at room temperature, with a relative humidity not more than 90%. They come sealed under dry nitrogen at reduced pressure, and should be kept away from water, acids and alkalis. A simple test to check if sieves are ready to use consists of placing a few beads in the palm of ones hand and adding a few drops of H2O. Dry sieves will give off a very noticeable heat.
Specs
Particle size: 4x8 or 8X12 mesh
Pore size: 3Å
Bead Size: 1.6~2.5
Bulk Density: ≥0.70~0.82 g/ml
Point Contact: N≥20~58
Size Qualification %≥ 98
Attrition Rate: wt%≤ 0.1
Variation Coefficient: 0.3
Eq. H2O Capacity: ≥ 19.0~20.0 wt%
Eq. Ethylene Capacity: ≤3.0mg/g
Heat of Adsorption: 1800 BTU/lb (H2O)
Package Moisture: wt%≤ 1.5