Suitable condenser for dichloromethane solvent

  • #1
kneo123
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TL;DR Summary
Soxhlet extractor kit shopping
Hello.
I have an interest in aquiring a soxhlet extractor glassware kit for experimentation and learning.
Something small like with a 250ml flask.
Not sure what geometry of condenser to go for, Graham Allihn, straight or else.
I will be using dichloromethane as a solvent and would like to know if it is suitable across any condenser type or there are issues with some condenser geometries.
What lenght of the condenser would be proper for dichloromethane?
 
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  • #2
For a low boiling solvent like DCM, I’d consider a dry ice condenser.
 

What type of condenser is best for distilling dichloromethane?

A Liebig or a Graham condenser is often recommended for distilling dichloromethane due to their efficient cooling capabilities, which are suitable for the low boiling point (39.6°C) of this solvent.

Can I use an air condenser for dichloromethane?

While an air condenser can be used for solvents with low boiling points, it is generally not recommended for dichloromethane. This is because dichloromethane's volatility might lead to significant loss of material without efficient cooling. A water-cooled condenser is usually preferred to minimize evaporation losses.

How should the condenser be set up for optimal recovery of dichloromethane?

The condenser should be set up in a vertical or diagonal position to ensure that the vapors are efficiently cooled and condensed back into a liquid form before they can escape. It's also important to ensure that the cooling water inlet is connected to the lower end and the outlet at the higher end to maximize cooling efficiency.

What cooling temperature is ideal when using a condenser with dichloromethane?

For dichloromethane, setting the cooling water temperature between 10°C to 15°C is generally effective. This sufficiently low temperature helps in condensing the vapors effectively without freezing the water in the condenser, which could lead to blockages or inadequate cooling.

Is there a risk of dichloromethane reacting with the material of the condenser?

Dichloromethane is a relatively non-reactive solvent with most materials commonly used in condenser construction, such as glass or stainless steel. However, it is always good practice to verify the compatibility of materials with the specific chemicals being used to avoid any potential issues like corrosion or degradation over time.

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