bluamine
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can hydrogen be stored under low pressure for hydrogenation reactions?
Hi everyone!!
I have no access for hydrogen tanks but I have an oxygen tank with a maximum pressure of 2000 psi, can I use it for hydrogenation reactions?
[Edited on 1-12-2022 by bluamine]
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Texium
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Refilling gas canisters, especially with gases that they were not intended to store, is ill-advised and potentially dangerous.
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blogfast25
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Which reactions specifically?
Ans what @Texium said.
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bluamine
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Quote: Originally posted by Texium  | | Refilling gas canisters, especially with gases that they were not intended to store, is ill-advised and potentially dangerous. |
Well TBH I was wondering if I can use a relatively small amount of hydrogen
I'm interested in several reactions actually, but at the moment I'm specifically interested in hydrogenation of Cyclohexene to convert it to
Cyclohexane
[Edited on 1-12-2022 by bluamine]
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blogfast25
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| Quote: Originally posted by blogfast25 |
Which reactions specifically?
.[/rquote]
I'm interested in several reactions actually, but at the moment I'm specifically interested in hydrogenation of Cyclohexene to convert it to
Cyclohexane
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Quite a few hydrogenations can now be carried out wirh ammonium formate and Pd-C as catalyst. No gaseous H2 needed.
[Edited on 1-12-2022 by blogfast25]
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Fery
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Today I did hydrogenation reaction with Pd/C catalyst and I used 1 L plastic bottle submersed in water bath. The bottle was initially filled with
water, then filled with H2 produced by electrolysis and at the end the H2 was consumed in the reaction by a connection with a hose leading through the
water bath.
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BromicAcid
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Yeah, be very careful putting hydrogen into units not intended for it, hydrogen embrittlement is a real threat.
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bluamine
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| Quote: Originally posted by blogfast25 |
Quite a few hydrogenations can now be carried out wirh ammonium formate and Pd-C as catalyst. No gaseous H2 needed.
[Edited on 1-12-2022 by blogfast25] |
Well some reactions must be done under pressure so it's impossible to do them without pressured hydrogen
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Fery
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bluamine you wanted hydrogenate Cyclohexene to convert it to Cyclohexane which runs fine at atmospheric pressure... slowly (few hours) but runs... at
least you can do this one reaction without need of compressed H2
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bluamine
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| Quote: Originally posted by Fery | | bluamine you wanted hydrogenate Cyclohexene to convert it to Cyclohexane which runs fine at atmospheric pressure... slowly (few hours) but runs... at
least you can do this one reaction without need of compressed H2 |
Ferrry I'm not sure but I read somewhere that I need 4 ATM or a little bit more for some reactions I'm interested in.. I know I may need a pressure
cooker to do but I remember some reactions may need up to 10 ATM
So I think i really need to buy a hydrogen tank but is it legal to buy in Europe? If so, I can bring one from there!
[Edited on 2-12-2022 by bluamine]
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Fery
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bluamine I did this with different substrate of C=C bond hydrogenation at atmospheric pressure, there is also time of the reaction (few hours)
https://www.sciencemadness.org/whisper/viewthread.php?tid=15...
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blogfast25
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| Quote: Originally posted by Fery | | Ferrry I'm not sure but I read somewhere that I need 4 ATM or a little bit more for some reactions I'm interested in.. I know I may need a pressure
cooker to do but I remember some reactions may need up to 10 ATM |
A typical pressure cooker will only deliver about 30 psi (2 atm) and obviously isn't designed for H2. Careful!
[Edited on 2-12-2022 by blogfast25]
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clearly_not_atara
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Nickel-catalysed isopropanol-donor CTH can reduce alkenes with the assistance of ultrasound:
https://www.sciencedirect.com/science/article/pii/S138589472...
[Edited on 04-20-1969 by clearly_not_atara]
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