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Hoffmann-LaRoche
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cool.gif posted on 10-9-2002 at 04:56
formaldehyde from HCOOH?

ive recently thought of making formaldehyde by reducing HCOOH or oxalic acid with nascent hydrogen.
Im not sure wether this would be a realizable process, but it could be quite cheap if the HCOOH was also self-made by reacting CO with NaOH and sulfuric acid.
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Yetrox
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[*] posted on 10-9-2002 at 11:28
Formaldehyde

Heya!

You might find the following methods interesting:

1.
Reactant: Formic Acid
Reagent: Water, Magnesium
Journal, Fenton JCS0A9; J.Chem.Soc; 91;1907;690

2.
Reactant: Formic Acid
Reagent: Zinc Oxide
yields Zinc-oxyformate which has to be heated up to 270 C,

3.
Reactant: Diethyl Ether
Reagent: Copper Oxide

I don't know the detailed procedures though.

Nick
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Hoffmann-LaRoche
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[*] posted on 10-9-2002 at 13:52


thanks dude.....i´m confident one of these meths will work.....although some of them arent that cheap.
I also had some similar ideas..
Let`s see wether that works next weekend..
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[*] posted on 11-9-2002 at 10:25


Check the methanal thread for another method starting from methanol.



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Hoffmann-LaRoche
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mad.gif posted on 11-9-2002 at 13:34
cant get no MOH, Vulture

thanks but i cant get methanol where i live.
Thats why i am fooling around with this stuff..

Greetings, HLR
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[*] posted on 12-9-2002 at 11:22


Are you sure? Even no spiritus for alcohol burners?



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[*] posted on 12-9-2002 at 16:40


absolutely nowhere.
It is declared highly poisonous here, and it needs a special permission to get it.

Can you think of other routes for CH2O?
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[*] posted on 13-9-2002 at 07:45


Hydrating an alkyne yields aldehydes, but that must be a heavily catalized and pressurized reaction.

Or hydrating a halogenalkane to an alcohol and then oxidizing to aldehyde?



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