3A Molecular Sieve Desiccant For Removing Moisture From Ethanol
Most of the industries require 100% water-free Ethanol. The finally manufactured alcohol is a rectified spirit with almost 94.6% alcohol and the remaining percentage is water. It is very difficult to remove the amount of water in alcohol using any straightforward and simple distillation process.
Therefore, a special 3 angstrom molecular sieves dehydration process needs to be carried out using latest technology to manufacture the absolute alcohol.
In the case of ethanol, water is extracted by making it dehydrated with the help of adsorbent structure of molecular sieve 3A. The potassium-based molecular sieve pore size of 3a is 3A0 or 3 Angstrom, it cannot adsorb all molecules which having the pore size is large then 3A.
3A molecular sieve can be available in beads, pellets and powder form.
Customer Case
23 Tons of 3A Molecular Sieve Used in Ethanol Distillation and Dehydration
The client company is engaged in ethanol production. In order to improve product quality and economic benefits, after many consultations, Chemxin's 3A molecular sieve was selected for ethanol dehydration treatment. According to the customer's requirements, Chemxin sent out 3A molecular sieves that met professional standards within one week, and sent a professional technical team to the customer's site for filling services.
Technical Parameter:
| Model | 3A | |
| CAS Number | 308080-99-1 | |
| Nominal pore diameter | 3 angstroms | |
| Shape | Sphere | Pellet |
| Diameter (mm) | 3.0-5.0(4*8 mesh) | 3.2(1/8 inch) |
| Size ratio up to grade (%) | ≥98 | ≥96 |
| Bulk density (g/ml) | ≥0.70 | ≥0.68 |
| Wear ratio (%) | ≤0.20 | ≤0.40 |
| Crushing strength (N) | ≥85/piece | ≥50/piece |
| Static H2O adsorption (%) | ≥21 | ≥21 |
| Ethylene adsorption (‰) | ≤3.0 | ≤3.0 |
| Water content (%) | ≤1.5 | ≤1.5 |
| Typical Chemical Formula |
0.4K2O . 0.6Na2O . Al2O3 . 2SiO2 . 4.5 H2O (SiO2 : Al2O3 ≈2) |
|
Brief Working of Ethanol Dehydration Process through Molecular sieve
Molecular sieve Dehydration Process requires a high level of purity in the range of industrial and food applications. Type 3A molecular sieves are considered as the most effective type to dry ethanol. In the ethanol dehydration process, the hydrated ethanol vapors are passed through the molecular sieve bed. As the vapors pass the sieve bed, in the very first step water gets adsorbed by the pores of the adsorbent structure. The process of adsorption continues until the possible water adsorption from these vapors gets completed or molecular sieve gets saturated.
The process of transferring the water from hydrated ethanol vapors to the activated molecular sieve occurs through an area or a zone where the reduction of water content carries from its inlet to outlet concentration. This master transfer zone provides one active bed for transporting the dehydration while another bed for regeneration. The movement from one bed to another is handled and controlled using the powerful valves and automation. The pure ethanol after the dehydration process using molecular sieves can be used as a fuel in automobiles and other useful applications.
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