|
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 |