Organic compounds have a very strong odor; should a positive-pressure or negative-pressure column be used for distillation?

2017-07-05View Original

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Organic compounds have a very strong odor; should a positive-pressure or negative-pressure column be used for distillation?

Reply #22017-07-05

The use of negative pressure and positive pressure depends on the condensation temperature at the top of the tower.

Reply #32017-07-05

There are those with negative pressure and those with positive pressure. It depends on the tower top condensation temperature.

Reply #42017-07-05

If it leaks, won’t the odor escape from the negative pressure tower?

Reply #52017-07-05

There are those with negative pressure and those with positive pressure. It depends on the tower top condensation temperature.

Reply #62017-07-05

Reference can be made to \"Research on Pressure Control Methods for Micro-positive Pressure Distillation Columns\".

Reply #72017-07-05

The positive or negative pressure should be determined based on the properties of the product to be separated; for example, if certain materials are prone to reacting at high temperatures, then negative pressure separation is used. As mentioned by the people above, it also depends on the condensation temperature at the top of the tower.

Reply #82017-07-06

Based on factors such as the equipment’s leakage rate and investment and operation costs, odor is not a major issue; highly toxic gases can also be handled under positive pressure, as long as the equipment’s leakage rate is sufficient

Reply #92017-07-06

This depends on the saturated vapor pressure during the distillation process; if it is relatively high, high-pressure operation is necessary. As for strong odors, the issue can be resolved by conducting thorough airtightness tests to prevent leaks.

Reply #102017-07-06

Whether it is positive pressure or negative pressure, in addition to considering the condensation temperature at the top of the tower, the temperature at the bottom of the tower also needs to be taken into account. If the temperature at the bottom of the tower is too high, it is not possible to proceed without an appropriate heat source

Reply #112017-07-06

As for the smell, there isn’t much difference when it’s recycled in a sealed environment

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