The pore size of 4A molecular sieve is 4A. It adsorbs water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, and propylene. It does not adsorb any molecule (including propane) with a diameter greater than 4A, and its selective adsorption performance for water is higher than any other molecule. 4A molecular sieve is one of the most widely used molecular sieve varieties in the industry.
The specific application of 4A molecular sieve
1. Daily Chemicals ---- Polyester Auxiliaries:
The role of A 4A molecular sieve as a detergent auxiliary is to exchange calcium ions in water to produce softened water, remove dirt and prevent redeposition of dirt. 4A molecular sieve is the most widely used and most mature product in the current generation of phosphate builder.
4A molecular sieve replaces sodium tripolyphosphate as a washing aid and plays a significant role in solving environmental pollution. 4A molecular sieve can also be used as a molding agent for soap, a friction agent for toothpaste and so on.
2. Environmental protection-sewage treatment:
4A molecular sieve can remove NH3-N and Pb2 +, Cu2 +, Zn2 +, Cd2 +, etc. in sewage. Sewage discharged from industry, agriculture, civil and aquatic animal husbandry contains ammonia nitrogen, which not only endangers the survival of fish, etc., and pollutes the internal breeding environment,
It also promotes algae growth, leading to blockage of rivers and lakes. Due to the high selectivity of 4A molecular sieve to NH4 +, it has been successfully applied in this field. Wastewater from metal mines, smelters, metal surface treatment and chemical industries,
The heavy metal ions contained therein are extremely harmful to the human body. In addition to using 4A molecular sieves to treat these sewage, in addition to ensuring qualified water quality, it can also recover heavy metals.
3. Other uses:
1 (1) Water treatment-hard water softener, which can replace the sulfonated coal widely used in China at present, thereby reducing costs;
Rhenium (2) Metallurgical industry-separating agent, separating and extracting potassium, rubidium, cesium, etc. in brine. Used in industrial processes for enrichment, separation and extraction of metals;
(3) Petrochemical industry-catalyst, desiccant, adsorbent;
(4) Agriculture-soil improver;
(5) Medicine-antibacterial agent containing silver zeolite.