1-) What is 4A Molecular Sieve
4Å molecular sieve is a kind of alkali metal silicic acid salt and 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).
2-) 4A Molecular Sieve Applications:
2.1.Polyester Agent Additives
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.
2.2Harmful Waste Treatment
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.
2.3.Other Purpose
The metallurgical industry - separating agent, separation, extraction of brine potassium, rubidium, cesium.
Petrochemical industry, catalyst, desiccant, adsorbent
Agriculture - soil conditioner;
Medicine - load silver zeolite antibacterial agent.
3-) Molecular Sieve 4A Technical Parameter
A4 Molecular Sieve Chemical Formula: Na2O?Al2O3?2SiO2?9/2H2OA4
Molecular Sieve Silica-alumina ratio: SiO2/ Al2O3≈2
| 4A Molecular Sieve Paradiameter | Unit | Bead | Bead | Pellet | Pellet |
| Diameter | Mesh | 8*12 | 4*18 | 1/16" | 1/8" |
| Water Adsorption Capacity | ≥%wt | 21 | 21 | 21 | 21 |
| Methanol Adsorption Capacity | ≤mg/g | 140 | 140 | 140 | 140 |
| Bulk Density | ≥g/ml | 0.66 | 0.66 | 0.64 | 0.64 |
| Strength | ≥N | 40 | 90 | 40 | 85 |
| Abrasion | ≤%wt | 0.1 | 0.1 | 0.2 | 0.2 |
| Water Content | ≤%wt | 1.5 | 1.5 | 1.5 | 1.5 |
1. WHAT WE ARE:
Hotech Chemical Co., Ltd. is well-know as a modern high-tech enterprise engaged in carbon molecular sieve researching and production. Factory located in the Economic Circle of the Yangtze River Delta occupied around 10000 sq. Mts in more than 2000 Tons output annually.
2. HISTORY:
Hotech and Shanghai Research Institute of Chemical Industry jointed together devote into carbon molecular seive researching for a few decades, in the year of 1984 China own produced carbon molecular sieve turn out successfully.
3. PRODOCT
Carbon molecular sieve is a new types adsorbent for PSA generator produce high-purity nitrogen widely used in chemical, medicine, metallurgy, meltal heat treatment, coal mine extinguishment, oil exploitation, foodstuff and beverage manufacture, electronics and other fields.
4. DEVELOPMENT
Hotech Chemical Co., Ltd. Start to produce carbon molecular sieve since the year of 1984. Success in the CMS production technology from original coal-based CMS to phenolic resin natrix CMS which result in a big progress of nitrogen yield, from initial 30L/h. Kgs up to 260L/h. Kgs.
Keep closed relationship with National Scientific and Researh Institute of Chemical Industry for learning, developes and innovation unceasingly ensure the CMS performance keep top-level of international standard.
Hotech built stable business relationship with the customers from United States, Canada, Netherlands, Denmark, France, Germany, Turkey, India, Malaysia, Thailand and other countries, supplied carbon molecular sieve peformance highly praised.
Today Hotech regard as the leader in carbon molecular sieve industry, more and more well-know in the market.
