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CAS Number: 70955-01-0
Linear Formula: Na12[(AlO2)12(SiO2)12] · xH2O
Other Names: Sodium Alumino-Silicate
4Å molecular sieves are widely used to dry laboratory solvents. They can absorb water and other molecules with a critical diameter less than 4 Å such as NH3, H2S, SO2, CO2, C2H5OH, C2H6, and C2H4. It is widely used in the drying, refining and purification of liquids and gases (such as the preparation of argon).
These molecular sieves are used to assist detergents as they can produce demineralized water through calcium ion exchange, remove and prevent the deposition of dirt. They are widely used to replace phosphorus.
The 4Å molecular sieve plays a major role to replace sodium tripolyphosphate as detergent auxiliary in order to mitigate the environmental impact of the detergent. It also can be used as a soap forming agent and in toothpaste. 4Å molecular sieves can purify sewage of cationic species such as ammonium ions, Pb2+, Cu2+, Zn2+ and Cd2+. Due to the high selectivity for NH4+ they have been successfully applied in the field to combat eutrophication and other effects in waterways due to excessive ammonium ions. 4Å molecular sieves have also been used to remove heavy metal ions present in water due to industrial activities.
1. The metallurgical industry - separating agent, separation, extraction of brine potassium, rubidium, cesium, etc.
2. Petrochemical industry, catalyst, desiccant, adsorbent.
3. Agriculture - soil conditioner.
4. Medicine - load silver zeolite antibacterial agent.