Desiccant


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desiccant

[′des·i·kənt]
(chemistry)

Desiccant

 

(or drying agent), a liquid or solid that takes up moisture, used for drying gases, liquids and, more rarely, solids. Desiccants are divided into three major groups: (1) water-adsorbing desiccants, (2) desiccants that form hydrates with water, and (3) desiccants that form other chemical compounds with water. The first group includes aluminum oxide, silica gel, and other adsorbents; the second group comprises certain anhydrous salts and fused hydroxides; and the third group includes metallic sodium and calcium, calcium oxide, and phosphorus pentoxide. The state of aggregation of the substance to be dried, the moisture content of the substance, and the drying conditions determine the selection of a particular desiccant. It is absolutely essential that the desiccant does not react with the substance to be dried.

desiccant

Any absorbent or adsorbent, liquid or solid, that will remove water or water vapor from a material. In a refrigeration circuit, the desiccant should be insoluble in the refrigerant.

silica gel

An absorbent form of silicon dioxide often wrapped in small packets that is shipped with equipment to absorb moisture. Silica gel packets are desiccants.

Don't Throw Them Away
Silica gel packets can be used to remove odors in a gym bag. Stored in a box of photos, they can prevent them from sticking to each other, and they can extend the life of razors by eliminating moisture. A wet phone can be dried out if placed in a jar filled with the gel bags. See silicon dioxide.


Silica Gel Packets
These commonly found desiccants are small beads of silica gel inside paper packets.
References in periodicals archive ?
Russia, Spain, the United Kingdom, Italy, France, Germany and countries in rest of Europe together form the pharmaceutical desiccant market in the European region.
A well-designed desiccant dehumidification system must consider the relationship between key parameters and variables including desiccant materials and properties, regeneration temperatures and cycles, and the ratio between air volume and desiccant mass.
Molecular sieve desiccant dries the process air best at low temperatures.
"So, instead of a typical desiccant sachet to protect the contents from moisture, Alchemy Performance Packaging proposed a Clariant desiccant sachet made with medical-grade Tyvek, filled with Clariant Sorb-It silica gel and a printed Swisse logo."
A pre-chamber was added upstream of the IEC heat and mass module to allow for insertion and removal of various desiccant cartridges or fixtures holding desiccant media.
WHEN SHIPMENTS ARE DELAYED, DESICCANT CAN BECOME SATURATED.
Sorbead India is a company engaged in manufacture of high quality silica desiccants that includes pharmaceutical desiccants.
Many researchers have attempted to determine the best solution for the high required regeneration temperature problem in one-stage desiccant cooling systems.
* Dryers with automatic desiccant regeneration controlled by dew-point sensors or by material moisture content are best, as overloading the desiccant will reduce process efficiency.
The desiccant scoops are made with pharmaceutical grade PP and are traditionally off-white, although they can be manufactured in an array of colors.
Superdry container desiccant absorbs 200% its own weight in moisture to maintain a low humidity in shipping containers and prevent condensation damage to cargo.
The desiccant cartridge is sealed to provide for minimum desiccant abrasion.