evaporating in vacuo
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biobiak
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evaporating in vacuo
what materials do i need to build an apparatus for evaporating in vacuo
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barretttomlinson
- Former Expert
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Re: evaporating in vacuo
Hi,
It is hard to answer this question without knowing more about what you are trying to do. The generic answer is a vacuum source, an evacuable container, and a means of connecting the two. The vacuum source is usually a water aspirator or laboratory oil rough pump, though several other options exist. The evacuable container is often a vacuum dessicator or vacuum flask. The means of connecting the two is usually thick wall rubber tubing. Because a vacuum places the vacuum chamber under a lot of pressure it creates a high risk of sending sharp glass shards flying everywhere if the evacuated vessel should break, so protective barriers between the vacuum and people are REQUIRED!!!! You should carefully check out the rules of the science fair you are entering before starting a project like this!!
This general experiment is often use to freeze dry foods or biological matererials to preserve them, or to concentrate or separate chemical mixtures without heating them. Specialized equipment variations have evolved that are better suited to each of these applications.
For more information, see:
http://www.rpi.edu/dept/chem-eng/Biotec ... index.html
http://en.wikipedia.org/wiki/Freeze_drying
http://www.genemco.com/catalog/evaporat ... gwodNRnJmw
Hope this helps!
Barrett Tomlinson
It is hard to answer this question without knowing more about what you are trying to do. The generic answer is a vacuum source, an evacuable container, and a means of connecting the two. The vacuum source is usually a water aspirator or laboratory oil rough pump, though several other options exist. The evacuable container is often a vacuum dessicator or vacuum flask. The means of connecting the two is usually thick wall rubber tubing. Because a vacuum places the vacuum chamber under a lot of pressure it creates a high risk of sending sharp glass shards flying everywhere if the evacuated vessel should break, so protective barriers between the vacuum and people are REQUIRED!!!! You should carefully check out the rules of the science fair you are entering before starting a project like this!!
This general experiment is often use to freeze dry foods or biological matererials to preserve them, or to concentrate or separate chemical mixtures without heating them. Specialized equipment variations have evolved that are better suited to each of these applications.
For more information, see:
http://www.rpi.edu/dept/chem-eng/Biotec ... index.html
http://en.wikipedia.org/wiki/Freeze_drying
http://www.genemco.com/catalog/evaporat ... gwodNRnJmw
Hope this helps!
Barrett Tomlinson