|
Drying agent
|
Regenerated / temp in C to constant weight
|
Applicable for
|
Not applicable for
|
Residual water: mg of water vapor per liter of dried air
|
Grams of water removed per gram of desiccant
|
|
Aluminum
|
no
|
Alcohols
|
|
|
|
|
Aluminum oxide
|
yes/650**
**aluminum oxide which has been used to remove peroxides must not be
regenerated
|
Hydrocarbons, ethers and other solvents
|
Compounds which contain epoxide, carbonyl or thio groups, carbon
disulfide
|
0.003
|
0.2
|
|
Calcium
|
no
|
Alcohols
|
|
|
|
|
Calcium chloride
|
yes / 250
|
Saturated, olefinic and aromatic hydrocarbons, alkyl halides, esters,
many esters
|
Ammonia, amines, alcohols, aldehydes, phenols, some esters, ketones
|
0.14-0.25
|
0.15-0.30
|
|
Calcium hydride
|
no
|
Gas drying, organic solvents, also ketones, esters
|
Compounds with active hydrogen
|
|
0.85
|
|
Calcium oxide
|
yes / 1000
|
Ammonia, amines, alcohols, nitrous oxide
|
Acids, acid derivatives, aldehydes, ketones
|
0.2
|
0.3
|
|
Calcium sulfate
|
yes / 190-230
|
Universal applications
|
|
0.07
|
0.07
|
|
Magnesium
|
no
|
Alcohols
|
|
|
|
|
Magnesium oxide
|
yes / 800
|
Basic liquids, hydrocarbons, alcohols
|
Acidic compounds
|
0.008
|
0.45
|
|
Magnesium perchlorate
|
yes / 240 @ 0.1 mbar
|
Inert gases, air, ammonia
|
Organic substances (explosion hazard)
|
0.0005
|
0.24
|
|
Magnesium sulfate
|
yes / first to 200 then red heat
|
Almost all compounds including acids, acid derivatives, aldehydes and
ketones
|
|
1.0
|
0.15-0.75
|
|
Molecular sieves
|
yes / 300-350
|
The application is dependent on the pore diameter, wide application for
gases and liquids
|
|
0.001
|
ó0.2
|
|
Potassium carbonate
|
yes / higher than 100
|
Basic solvents (e.g. ammonia, amines), nitriles, chlorinated
hydrocarbons, acetone
|
Acids
|
|
0.16
|
|
Potassium hydroxide
|
no
|
Basic liquids (e.g. amines)
|
Acids, esters, amides, phenols
|
0.002
|
|
|
Sicacide Sulfuric acid concentrated
|
no
|
Inert neutral and acidic gases and in desiccators
|
Unsaturated and other organic compounds, hydrogen sulfide, hydrogen
iodide
|
0.003
|
|
|
Sicapent Phosphorus pentoxide
|
no
|
Gases, neutral and acidic saturated aliphatic and aromatic hydrocarbons,
acetylene, anhydrides, nitriles, alkyl and aryl halides, carbon disulfide
and in desiccators
|
Alcohols, amines, acids ketones, ethers, hydrogen chloride, hydrogen
fluoride
|
max. 000025
|
|
|
Silica gel
|
yes / 150-250
|
Gas drying, wide use for organic liquids
|
Hydrogen fluoride
|
0.002
|
0.2
|
|
Sodium
|
no
|
Ethers, saturated aliphatic and aromatic hydrocarbons, tertiary amines
|
Acids, acid derivatives, alcohols, aldehydes, ketones
|
|
|
|
Sodium hydroxide
|
no
|
Basic liquids, e.g. amines
|
Acids, acid derivatives, phenols
|
|
|
|
Sodium oxide
|
no
|
Ethers, amines, nitriles, amides, alcohols
|
Acids, acid derivatives, phenols
|
|
|
|
Sodium sulfate
|
yes / 150
|
Alkyl and aryl halides, fatty acids, esters, aldehydes, ketones
|
|
12
|
1.25
|
|
Sodium-potassium alloy
|
no
|
Ethers, saturated aliphatic and aromatic hydrocarbons
|
Acids, acid derivatives, alcohols, aldehydes, ketones, alkyl and aryl
halides
|
|
0.08
|