As a filter aid, expanded perlite bubbles can be used to separate small solid particles from liquids due to their physical characteristics. An aid to filtration is a finely graded material that, when added to the liquid to be filtered, collects on the septum (a screen or cloth). Thus, filter aids form porous layers on the septum, allowing solids to be trapped there without blinding the septum. Expanded Perlite bubble structures are milled and classified with strict processes to produce Perlite filter aids with specific flow characteristics. For a wide variety of applications, the various grades use the jagged interlocking structures to create billions of microscopic channels between the filter aid particles.
The Benefits of Perlite as a filter Aid:
A Perlite filter aid is lightweight, inert, imparts no taste or odor to the liquid being filtered, is insoluble in mineral, organic, and alkaline acids, and is almost insoluble in water at all temperatures. Depending on temperature and contact time, alkaline solutions have different solubility. A filter aid will prevent solid particles from building up on filtering surfaces and blocking them without accumulating on them. The actual filtering is carried out on top of the layer of filtering created by Perlite filter aids. A filter aid forms tiny pores that allow filtration to occur.
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Filtration and Process Aid
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Filtration and Process Aid
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Filtration and Process Aid
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Filtration and Process Aid
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Filtration and Process Aid
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Filtration and Process Aid
Applications: There are many applications where Perlite filter aids are being utilized due to their low density, availability, performance, economy, and environmental footprint.
Food Processing: juices, beers, sweeteners, wines, vegetable oils, wastewater treatment.
Pharmaceuticals: Enzymes, antibiotics, Epsom salt
Industrial: Water treatment, sizing, oil & solvent recovery, greases
Chemicals: Inorganic & organic chemicals, resins, polymers, brine, adhesives, fertilizers, waste disposal
Paint & Coatings: Waxes, oils, varnish, gums, shellac, wastewater treatment.
Physical Properties:
|
Item |
Model |
||
|
fast-speed |
medium-speed |
low-sped |
|
| Bulk density |
<0.15 |
< 2 |
< 0.25 |
| Permeability(Darcy) |
10-2 |
2-0.5 |
0.5-0.1 |
| suspended matter(%) |
≤15 |
≤4 |
≤1 |
| 102um(150mesh) |
≤50 |
≤7 |
≤3 |
| Item | Specifications |
| PH | 5.5—9.0 |
| Soluble substance by water (%) | ≤0.2 |
| Soluble substance by hydrochloric acid(%) | ≤2.0 |
| Pb(%) | ≤4.0 |
| As(ppm) | ≤4.0 |
| Fe2O3(%) | <2.0 |
| Loss(%) | ≤2.0 |