As part of a process I must heat an oil above its smoke point. How do I prevent the oxidation of the oil while it is still hot?
2006-08-28 10:13:50 · 8 answers · asked by zymer5 1 in Science & Mathematics ➔ Chemistry
Use a vacuum to remove oxygen.
2006-09-04 09:50:24 · answer #1 · answered by exert-7 7 · 0⤊ 0⤋
To reduce the rate of oxidation you must reduce its exposure to oxygen. Even a lid over a pan of hot oil will help.
More effective would be to arrange a blanket of nitrogen over the surface.
You can also add some chemical antioxidants to the fresh oil before heating it.
In all cases cool the hot oil as quickly as possible.The rate of oxidation doubles for every 10C rise in temperature.
2006-08-28 21:31:08 · answer #2 · answered by Anonymous · 0⤊ 0⤋
keep it in a sealed environment with all the oxygen depleted (making a flame will get the oxygen out)
2006-08-28 18:29:04 · answer #3 · answered by on theWaves 3 · 0⤊ 0⤋
make it away from oxygen in an inert environment ,for example nitrogen environment
2006-09-04 11:56:02 · answer #4 · answered by samar 1 · 0⤊ 0⤋
Use nitrogen gas, instead of air.
2006-08-28 17:18:34 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Keep oxygen away from it.
2006-08-28 17:17:00 · answer #6 · answered by Steve 7 · 0⤊ 0⤋
inert atmosphere. if you're good use N2, if not use Ar.
2006-09-01 22:16:52 · answer #7 · answered by shiara_blade 6 · 0⤊ 0⤋
maybe add water oil floats....
2006-08-28 17:19:59 · answer #8 · answered by simon m 1 · 0⤊ 0⤋