Drying Agent Data

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