A cold trap is an apparatus for efficiently capturing hazardous vapors

The model UT series efficiently captures hazardous vapors by utilizing temperature differentials. When using vacuum ovens or centrifugal evaporators, a cold trap is required. It effectively traps water vapor and toxic fumes emitted from vacuum drying or concentration equipment within the vacuum system. This not only significantly extends the service life of exhaust systems but also ensures compliance with emission and drainage regulations.　

Main Applications

Benefits of Cold Trap Units

Note: The larger the temperature difference between the solvent’s boiling point under pressure and the collection unit, the more effectively vapors can be condensed and captured, thereby increasing recovery efficiency.

Convenient options: Aluminum block sets for cold traps

Trappable solvents under high vacuum conditions

Substance name	Low-boiling point substances
		at 798Pa (6mmHg)			at 133Pa (1mmHg)
		When using a diaphragm vacuum pump			When using an oil rotary vacuum pump
		UT-1000 UT-3010L	UT-4000A UT-4000L	UT-2000	UT-1000 UT-3010L	UT-4000A UT-4000L	UT-2000
Ultimate temperature		-50°C	-80°C	-100°C	-50°C	-80°C	-100°C
Water	—	Yes	Yes	Yes	Yes	Yes	Yes
Isopentane	Yes	—	Yes	Yes	—	—	Yes
Neopentane	Yes	—	—	Yes	—	—	—
Pentane	Yes	—	—	Yes	—	—	Yes
Hexane	Yes	Yes	Yes	Yes	—	Yes	Yes
Heptane	Yes	Yes	Yes	Yes	—	Yes	Yes
Ethyl acetate	Yes	Yes	Yes	Yes	—	Yes	Yes
Methylamine	Yes	—	—	Yes	—	—	—
Ethylamine	Yes	—	Yes	Yes	—	—	Yes
Acetonitrile	Yes	Yes	Yes	Yes	—	Yes	Yes
Methyl mercaptan	Yes	—	—	Yes	—	—	—
Ethyl mercaptan	Yes	—	—	Yes	—	—	Yes
Chloroform	Yes	—	Yes	Yes	—	Yes	Yes
Methyl chloride	Yes	—	—	Yes	—	—	—
1,1-Dichloroethane	Yes	—	Yes	Yes	—	Yes	Yes
1,2-Dichloroethane	Yes	Yes	Yes	Yes	—	Yes	Yes
Dichlorofluoromethane	Yes	—	—	Yes	—	—	—
Methanol	Yes	—	Yes	Yes	—	Yes	Yes
Ethanol	Yes	—	Yes	Yes	—	Yes	Yes
Propanol	Yes	—	Yes	Yes	—	Yes	Yes
Isopropanol	Yes	—	Yes	Yes	—	Yes	Yes
Butanol	Yes	—	Yes	Yes	—	Yes	Yes
Ethylene oxide	Yes	—	—	Yes	—	—	—
Diethyl ether	Yes	Yes	Yes	Yes	—	Yes	Yes
Acetaldehyde	Yes	—	—	Yes	—	—	—
Acetone	Yes	—	Yes	Yes	—	Yes	Yes
Methyl ethyl ketone	Yes	Yes	Yes	Yes	—	Yes	Yes
Benzene	Yes	Yes	Yes	Yes	—	Yes	Yes
1,3-Butadiene	Yes	—	—	Yes	—	—	—
Cyclopentane	Yes	—	Yes	Yes	—	—	Yes
Cyclohexane	Yes	Yes	Yes	Yes	—	Yes	Yes
Octane	—	Yes	Yes	Yes	Yes	Yes	Yes
Toluene	—	Yes	Yes	Yes	Yes	Yes	Yes
Ethylbenzene	—	Yes	Yes	Yes	Yes	Yes	Yes
o-Xylene	—	Yes	Yes	Yes	Yes	Yes	Yes
m-Xylene	—	Yes	Yes	Yes	Yes	Yes	Yes
p-Xylene	—	Yes	Yes	Yes	Yes	Yes	Yes
Acetic acid	—	Yes	Yes	Yes	Yes	Yes	Yes
Aniline	—	Yes	Yes	Yes	Yes	Yes	Yes
Pyridine	—	Yes	Yes	Yes	Yes	Yes	Yes
Chlorobenzene	—	Yes	Yes	Yes	Yes	Yes	Yes

Note: These values are theoretical guidelines. Depending on the actual ambient environment and load, the trap temperature may rise, potentially preventing successful collection.
Note: Set the trap temperature based on a guideline of at least a 10°C difference from the solvent’s boiling point under the specific reduced pressure.

Risks associated with operating without a cold trap

Vacuum pump		Diaphragm vacuum pump			Oil rotary vacuum pump
Sample		Aqueous samples	Organic solvents	Acids	Aqueous samples	Organic solvents	Acids
Released into the atmosphere, affecting operators		—	Yes	Yes	—	Yes	Yes
Released into the atmosphere, affecting the work environment		—	Yes	Yes	—	—	—
Internal corrosion of the pump		—	—	—	Yes	—	Yes
Peeling of the pump’s paint		—	Yes	Yes		Yes	Yes
Corrosion of surrounding areas		—	—	Yes	—	—	Yes
Accelerated degradation of pump oil		—	—	—	Yes	Yes	Yes
Failure to reach high vacuum levels		Yes	Yes	Yes	Yes	Yes	Yes
Slow concentration speed		Yes	Yes	Yes	Yes	Yes	Yes

Compatibility with combined equipment

A List of Cold Traps and their Primary Features (Combination options)