Help with reaction between MEA and phosphorus acid

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hoangnga0896
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Help with reaction between MEA and phosphorus acid

Post by hoangnga0896 »

I have done an experiment with 2 substances monoethanolamine (MEA) and phosphorus acid (H3PO3) but I do not know exact products of this reaction. Could anyone give an idea about this problem?
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ChenBeier
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Post by ChenBeier »

Itis a normal neutralisation.

2

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 HOCH2CH2NH2 + H3PO3 => [HOCH2CH2NH3]2HPO3 
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Post by hoangnga0896 »

Actually, MEA is taken into a mixture of CuSO4 and H3PO3. I saw a white cloud after reaction. I wonder if it is CO2 or NOx smoke...
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Post by ChenBeier »

The white cloud is the ammoniumsalt nebula.
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Post by hoangnga0896 »

You mean [HOCH2CH2NH3]2HPO3 is in nebular form?
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Post by ChenBeier »

Correct. The same if you use ammonia gas and HCl gas.
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Post by hoangnga0896 »

So there is no amoniumsalt in the solution?
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Post by ChenBeier »

Its in the solution as well. The cloud appers because it gets hot during neutralisation.
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Post by hoangnga0896 »

Could you send me documentaries related to this reaction via my email: hoangnga.0896@gmail.com please. I need to prove the equation to my boss.
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Post by ChenBeier »

This is basic chemistry. Amines react with acids. There is nothing to approve. Look in a chemist book.
Last edited by ChenBeier on Fri Jul 20, 2018 6:56 am, edited 1 time in total.
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Post by hoangnga0896 »

Okay. I got it. Thank you very much.
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Post by hoangnga0896 »

I've been looking for the name of the product you did type but there was no result. Are there any other reactions?
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Post by hoangnga0896 »

There is only reaction between MEA and phosphoric acid (H3PO4) either.
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Post by ChenBeier »

Do we talk about phosphoric acid

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H3PO4
or phosphorous acid

Code: Select all

H3PO3
.

The product is Bis(Hydroxyethyl)-ammoniumphosphite
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Post by hoangnga0896 »

MEA + H3PO3
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