 |
to remove solid suspended
impurities from liquids?
to get excellent clarity of liquid and
a consistent flow rate at a very
economical cost.
Perlite in its natural state is a volcanic siliceous rock containing 3-4% of occlude water. When crushed and heated up to a temperature of approx. 950 C, it pops like “popcorn” expanding to about 20 or more times its original volume. This popping action gives rise to a host of properties that make the Expanded Perlite ideal for use in many industrial applications. The expansion process also creates one of perlite’s most distinguishing characteristics : “White Colour”.
Harsh Geo Chem Private Limited has successfully put up a plant for manufacturing Perlite filteraids in India. The plant is located at Mehsana, dist. North Gujarat. The perlite manufactured by the plant is branded as CLEAR-FLOW and is thus a natural aid to industrial filtration.
PHYSICAL CHARACTERISTICS |
CHEMICAL CHARACTERISTICS |
|
Chemically, it is an amorphous mineral consisting of fused sodium potassium aluminum silicate. Solubility of CLEAR-FLOW Perlite Filteraid is extremely low in organic and inorganic acids at both high and low temperatures. Solubility in alkalies depends upon the kind of alkalies, the concentration and time & temperature in contact. |
Dry Loose Density 65 - 180 Kg/Cu.M Dry Compact Density 205 - 325 Kg/Cu.M |
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Grades |
Mean Particle Size (Micron) |
FIlter
Cacke Density-Max. (gms/cc) |
FlowRatio (apprx.) |
Hygro- scopicity |
| CLEAR-FLOW (H-99 ) | 12.0-18.0 |
0.140-0.215 |
1650 |
NIL |
| CLEAR-FLOW (H-199) | 8.0-12.0 |
0.230 |
655 |
NIL |
| CLEAR-FLOW (H-299 | 6.0-10.0 |
0.242 |
350 |
NIL |
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It is directly related to Filteraid performance. Larger the particles size more permeable is the Filteraid. Proper blend of particle size gives highest clarity at maximum flowrate. |
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As compared to the diatomite Filteraid Perlite filteraids form lower density cakes. CLEAR-FLOWTM Filteraid is available in wide range of grades. The Filter equipment to be used is depended on this factor.
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FILTER-FLOW Filteraids can filter out sub-micron range particles (less than 1.0 micron size). Low permeability grades of CLEAR-FLOWTM give the Highest clarity. |
CLEAR-FLOW PERLITE FILTERAID GRADES
| Physical
Properties |
|||
Description |
H-99 |
H-199 |
H-299 |
| Colour | White |
White |
White |
| Dry Loose Density (gms/cc) | 0.08
ti 0.11 |
0.10
to 0.14 |
0.12 to 0.17 |
| Wet Cake Density | 0.215 |
0.230 |
0.242 |
Moisture At 105 Degree C (Max) |
1.5% |
1.5% |
1.5% |
| Water Absorption (as % by wt. of clear-flow) | 280
to 345 |
260
to 300 |
225
to 270 |
| Oil Absorption (as %by wt. of clear-flow) | 230
to 265 |
245
to 270 |
210
to 230 |
| Hygroscopicity | NIL |
NIL |
NIL |
| Specific Gravity | 2.34 |
2.34 |
2.34 |
| Flow Ratio | 1650
apprx. |
655 |
350 |
| Mean Particle Size (microns) | 12.0
to 18.0 |
8.0
to 12.0 |
6.0
to 10.0 |
| % Retained On 150 Mesh (max) | 17.0
apprx. |
8.0
apprx |
4.0
apprx. |
| % Retained On 325 Mesh (max) | 60.0
apprx |
45.0
apprx. |
20.0
apprx. |
| Chemical
Properties |
|
| Silocon Dioxide % | 70.0
to 76.0 |
| Alluminium Oxide % | 10.0
to 14.0 |
| Ferric Oxide % (Max) | 0.40 |
Feerous Oxide % (Max) |
0.50 |
| Calcium Oxide % | 0.50 |
| Magnesium Oxide % | 0.20 |
| Sodium Oxide % | 3.0
to 4.0 |
| Potassium Oxide % | 4.0
to 5.0 |
| Organic Matter % | NIL |
| pH of 10% Slurry in Water | 6.5
to 8.0 |
Solubility |
Negligible
: In Water and Weak Acids |
|
Somewhat
Soluble : In Strong Acids/Alkali |
CLEAR-FLOW
filter aids are used as : |
PRECOAT
: The liquid to be filteraid is allowed to flow through
a packed layer of filteraid |
BODY
FEED: Filteraid itself is added to the liquid to be filteraid |
| Indistrial
applications of CLEAR-FLOW perlite
filter aids |
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Chemicals |
Paints |
Dyes |
Dextrose/Glucose |
Antibiotics |
Resins |
Vegetable
Oil |
Soft
Drinks |
* Perlite customized Filter Aid range of products remove impurities suspended in liquids faster and at economical rate
* It ensures excellent clarity of liquids, a consistent flow rate and that too at economical rate
