How Much Drierite Do I Need? four ounces of DRIERITE for every 10 cubic feet of free volume to dry the air in the container. At more extreme conditions (100° F and 100% R.H.) eight ounces of DRIERITE would be required.
How do I get help with Drierite?
Hello. Welcome to Drierite! If you need any help with our products or this website please give us a call at 937-376-2927. We really enjoy talking with our customers, so don't hesitate to call if we can save you some time or make things easier! Open M-F 8 AM - 4 PM EDT Click on any item below to enter the DRIERITE Desiccant Catalog
What is Drierite made of?
Calcium sulfate (better known commercially as Drierite®) is an inexpensive alternative available in suitable packaging forms. Calcium sulfate is created by the controlled dehydration of gypsum, acting as a general-purpose desiccant geared mainly toward laboratory use.
How many units of desiccant do I need for my barrier?
Table 3 provides a convenient reference to help determine how many units will be required based on the following formula: For flexible containers: units of desiccant required = 1.6 x A (in ft 2) or 0.011 x A (in 2) where A = the area of the barrier in ft 2 or in 2.
How do you determine the amount of bagged desiccant required?
MIL-STD-2073-1 details the generally accepted method for determining the amount (in desiccant units) of bagged desiccant required based on the size and the type of a container.
How long to dehydrate drierite?
How long to heat indicator drierite?
What temperature to use for regenerating desiccants?
What is industrial drier?
Can DRIERITE be reused?
How long does DRIERITE last?
Fortunately, the amount of air entering the tank usually requires a drier large enough to handle the flow rate. DRIERITE Storage Tank Vent Driers are normally sized to last from one to six months per charge of desiccant.
How do you use DRIERITE?
Commercial Grade and Du-Cal DRIERITE Exhausted Commercial DRIERITE or Du-Cal DRIERITE should be spread about 1 inch deep in shallow pans and heated in a oven at 450° F or 230° C for 2 hours to achieve complete dehydration. The regenerated material should be placed in the original container and sealed while hot.
Is DRIERITE a drying agent?
DRIERITE is an all purpose drying agent for the efficient and rapid drying of air, industrial gases, refrigerants, organic liquids and solids.
What is DRIERITE formula?
Linear Formula: CaSO4. CAS Number: 7778-18-9. 136.14.
Is DRIERITE reusable?
Q: Can Drierite be regenerated and used again? A: Yes, Drierite can be regenerated by spreading the granules in a tray and heating them in an oven at about 425°F (220°C) for 1 to 1.5 hours.
What is the strongest desiccant?
Molecular SieveWhy Molecular Sieve is the best desiccant: Highest adsorption capacity at low relative humidity.
Why does DRIERITE change color?
Indicating DRIERITE is blue when dry and changes to pink upon absorption of moisture. The color change is pronounced and clearly visible. This makes Indicating DRIERITE valuable when it is necessary to know with certainty that dryness is being maintained and to signal when the drying agent should be replaced.
Is DRIERITE toxic?
Hazards - SDS May cause cancer by inhalation. May damage fertility or the unborn child. May cause an allergic skin reaction. May cause allergy or asthma symptoms or breathing difficulties if inhaled.
What is the mesh for DRIERITE?
Drierite® is anhydrous calcium sulfate, granule size is 8 mesh.
How do I choose a desiccant?
Know the environment: In order to select an appropriate desiccant, it is important to know the conditions surrounding the shipment and storage of the product; the extremes of temperature and relative humidity to which the product will be exposed and the average duration of such exposures.
Is calcium sulfate harmful to humans?
Calcium sulfate is a relatively non-hazardous chemical. Any hazards are due primarily to the physical hardness of the particles. Repeated or prolonged contact can irritate the skin and eyes. Breathing anhydrite particles can irritate the nose and throat, causing a sore throat, nosebleeds and shortness of breath.
What is the difference between calcium sulfate and plaster of Paris?
Plaster of Paris contains calcium sulfate. The key difference between calcium sulfate and plaster of Paris is that calcium sulfate is an inorganic compound having a calcium cation and sulfate anion, whereas plaster of Paris is a material containing calcium sulfate hemihydrates.
What is the mesh for DRIERITE?
Drierite® is anhydrous calcium sulfate, granule size is 8 mesh.
Is DRIERITE toxic?
Hazards - SDS May cause cancer by inhalation. May damage fertility or the unborn child. May cause an allergic skin reaction. May cause allergy or asthma symptoms or breathing difficulties if inhaled.
What is DRIERITE chemistry?
DRIERITE, Indicating is Calcium Sulfate, Anhydrous. It is impregnated with cobalt chloride making the material blue when dry and changing to rose-red upon absorbtion of moisture. The material is an all-purpose drying agent.
What color is DRIERITE?
Drierite Desiccants Indicating DRIERITE is blue when dry and changes to pink upon absorption of moisture. The color change is pronounced and clearly visible.
Packaging Suggestions
A commonly used storage container is a corrugated carton or a wooden box. Unless they are wax-coated or resin-treated, water vapor is transmitted through them quite readily. Standard practice is to line them with a plastic film, such as polyethylene.
How Much DRIERITE Is Required?
There are four sources of water contamination in a closed container or package: the water vapor in the air inside the package, the water adsorbed in the materials inside the package, the water adsorbed on the walls of the container, and the permeation of water vapor into the container.
Regular and Indicating DRIERITE
For the regeneration of Indicating DRIERITE and small lots of Regular DRIERITE , the granules may be spread in layers one granule deep and heated for 1 hour at 210° C or 425° F. The regenerated material should be placed in the the original glass or metal container and sealed while hot.
Commercial Grade and Du-Cal DRIERITE
Exhausted Commercial DRIERITE or Du-Cal DRIERITE should be spread about 1 inch deep in shallow pans and heated in a oven at 450° F or 230° C for 2 hours to achieve complete dehydration. The regenerated material should be placed in the original container and sealed while hot.
The Importance of Temperature
The temperature at which DRIERITE desiccants are regenerated is crucial in restoring DRIERITE to its original condition. Absorbed moisture is water of hydration and is chemically bound to the calcium sulfate of DRIERITE.
How long to dehydrate drierite?
Exhausted Commercial DRIERITE or Du-Cal DRIERITE should be spread about 1 inch deep in shallow pans and heated in a oven at 450° F or 230° C for 2 hours to achieve complete dehydration. The regenerated material should be placed in the original container and sealed while hot.
How long to heat indicator drierite?
For the regeneration of Indicating DRIERITE and small lots of Regular DRIERITE , the granules may be spread in layers one granule deep and heated for 1 hour at 210° C or 425° F. The regenerated material should be placed in the the original glass or metal container and sealed while hot. The color of the Indicating DRIERITE may become less distinct on successive regenerations due to the migration of the indicator into the interior of the granule and sublimation of the indicator.
What temperature to use for regenerating desiccants?
Absorbed moisture is water of hydration and is chemically bound to the calcium sulfate of DRIERITE. Temperatures in the range of 400° - 450° F are required to break these bonds and release absorbed moisture. Lower temperatures, regardless of heating time, will not regenerate DRIERITE unless applied under vacuum (26" Hg, 325° F or 28" Hg, 275° F). Care should be taken not to overheat DRIERITE Desiccants. High temperatures can alter the crystal structure and render the desiccants permanently inactive.
What is industrial drier?
Industrial driers have many applications for the drying of air and industrial gases in relatively large quantities on either continuous or intermittent duty cycles. Usually the requirements are such that two columns are needed, one to be in service while the other is being regenerated.
Can DRIERITE be reused?
After normal use, any of the forms of DRIERITE may be regenerated for reuse. The operation is simple and involves only standard equipment. The used and exhausted desiccant should be ventilated to remove vapors, if any, and stored in a convenient container until a sufficient
What is the most commonly used moisture saturation standard?
The U.S. Department of Defense (DoD) has developed specifications to address issues of moisture saturation, the most commonly used being MIL-D-3464C and MIL-P-116. Having long been the only objective resource for packaging, DoD specifications create a uniform standard of comparison in a wide variety of areas. Unfortunately, these specifications fail to deal with more precise variables such as product environment, the packaging of the product itself, and the type of desiccant most suitable for any refined need. For more specialized situations, such as electronic equipment or otherwise sensitive products and components - or if you are unsure as to alternative uses for desiccant - it is probably best to consult an authority.
How many units of desiccant are needed for a container?
For flexible containers: units of desiccant required = 1.6 x A (in ft 2) or 0.011 x A (in 2) where A = the area of the barrier in ft 2 or in 2.
What is the most common desiccant?
Perhaps the most commonly used desiccant, silica gel, is an amorphous form for silica manufactured from sodium silicate and sulfuric acid. Its interconnected pores form a vast surface area that will attract and hold water by adsorption and capillary condensation, allowing silica gel to adsorb about 40% of its weight in water. Silica gel is extremely efficient at temperatures below 77°F (25°C) (see Figures 1 and 2), but will lose its adsorption capacity as temperatures begin to rise, much like clay (Table 2). Much of silica gel 's popularity is due to its noncorrosive and non-toxic nature; some grades have received U.S. government approval for use in food and drug packaging.
What is the adsorbent capacity of calcium oxide?
Calcium oxide is calcinated or recalcinated lime having a moisture adsorptive capacity of not less than 28.5% by weight . The distinguishing feature of calcium oxide (also known as quicklime) is that it will adsorb a much greater amount of water vapor at a very low relative humidity than other materials (Table 2).
What is the most useful combined measure of temperature and relative humidity?
The most useful combined measure of temperature and relative humidity is the dew point . Dew point is the temperature at which the water vapor content of the air exceeds saturation and the excess water is squeezed out, forming dew or condensation. The dew point varies with the amount of water vapor in the air.
Is Montmorillonite clay adsorbent?
Montmorillonite clay is a naturally occurring adsorbent created by the controlled drying of magnesium aluminum silicate of the subbentonite type. This clay will successfully regenerate for repeated use at very low temperatures without substantial deterioration or swelling. However, this property causes clay to desorb moisture readily back into the container as temperatures rise. Clay is inexpensive and highly effective within normal temperature and relative humidity ranges (Table 2).
How long to dehydrate drierite?
Exhausted Commercial DRIERITE or Du-Cal DRIERITE should be spread about 1 inch deep in shallow pans and heated in a oven at 450° F or 230° C for 2 hours to achieve complete dehydration. The regenerated material should be placed in the original container and sealed while hot.
How long to heat indicator drierite?
For the regeneration of Indicating DRIERITE and small lots of Regular DRIERITE , the granules may be spread in layers one granule deep and heated for 1 hour at 210° C or 425° F. The regenerated material should be placed in the the original glass or metal container and sealed while hot. The color of the Indicating DRIERITE may become less distinct on successive regenerations due to the migration of the indicator into the interior of the granule and sublimation of the indicator.
What temperature to use for regenerating desiccants?
Absorbed moisture is water of hydration and is chemically bound to the calcium sulfate of DRIERITE. Temperatures in the range of 400° - 450° F are required to break these bonds and release absorbed moisture. Lower temperatures, regardless of heating time, will not regenerate DRIERITE unless applied under vacuum (26" Hg, 325° F or 28" Hg, 275° F). Care should be taken not to overheat DRIERITE Desiccants. High temperatures can alter the crystal structure and render the desiccants permanently inactive.
What is industrial drier?
Industrial driers have many applications for the drying of air and industrial gases in relatively large quantities on either continuous or intermittent duty cycles. Usually the requirements are such that two columns are needed, one to be in service while the other is being regenerated.
Can DRIERITE be reused?
After normal use, any of the forms of DRIERITE may be regenerated for reuse. The operation is simple and involves only standard equipment. The used and exhausted desiccant should be ventilated to remove vapors, if any, and stored in a convenient container until a sufficient
Purpose
Application
- In general, the water content of the liquid to be dried should be 1% or less and preferably 0.1% (1000 ppm) by weight. In this range, the DRIERITE can be considered to be economically feasible as a disposable desiccant and is discarded after a single batch use. Alternate procedures include removal of DRIERITE for regeneration or regeneration in pla...
Liquid Properties Affecting Drying
- The viscosity, polarity and solubility of water in the organic liquid will determine how difficult the particular organic liquid is to dry. Alcohols, ketones, and amines are more difficult to dry than ethers and aliphatics. Oils and highly branched molecules are more difficult to dry than short or straight molecules. With highly polar liquids, the desiccant must overcome the attraction of the …
Determination of Size
- The quantity of DRIERITE necessary to dry a particular batch of liquid must be sufficient to absorb all of the water available as determined by a sample analysis. DRIERITE has a theoretical chemical capacity for water of 6.6%; however, in liquid phase drying, we recommend that 5% be used as a design capacity for the entire column. In other words, 100 pounds of DRIERITE should be used f…
Drying Column Design
- A tall, small diameter column will give maximum turbulence and, perhaps, improve drying efficiency; however, for convenience in filling and emptying the column with DRIERITE, a height to diameter ratio of 4:1 is good, but this could vary from 1:1 up to 8:1. A total height in excess of 7 feet should be avoided to minimize weight on the granules on the desiccant screen support. A 1…
Operation
- Placing the DRIERITE granules in the column should be done carefully by building up uniform layers of granules. Just pouring them into the center of the vessel will cause a cone shaped pile of segregated granules with larger granules on the periphery, causing channeling or non-uniform flow through the drier. The pressure and flow of the liquid should be regulated to avoid surges th…
Regeneration
- DRIERITE can be reused by regenerating it after it is exhausted. This can be done by removing it from the column and heating it in an oven or it can be reactivated in the column. If the DRIERITE is removed from the column it should be placed in pans or trays about one inch deep and heated at 400° to 450° F for two hours. It is recommended that the organic liquid be vacuumed off before t…