Those familiar with coal-based ethylene glycol, please come in
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The first reaction in Tongliao Jinmei’s coal-to-ethylene glycol process is: 2CO + 2CH3NO2 = (COOCH3)2 + 2NO. Before this reaction takes place, a dehydrogenation reaction must be carried out, which primarily involves the addition of oxygen. It is certain that hydrogen has an impact on the carbonylation reaction; however, I have learned that oxygen also affects this reaction, especially since the oxidation of methyl nitrite is highly explosive. Could someone explain what hydrogen and oxygen do to reactions, and how production is controlled? Another point is that in the manufacturing process, there is a step where methanol is mixed with water in the reaction vessel along with sodium nitrite. I don’t understand what reaction can occur between methanol and sodium nitrite? Can methyl nitrite be produced? Or dehydrate sodium nitrite? And after coming out of the reactor vessel, it enters the wash tower, and then the compressor; what kind of gas comes out of the wash tower? If you know, please explain it! ! !
The first step mentioned upstairs is the production of dimethyl oxalate, right? Dehydrogenation essentially refers to the dehydrogenation of syngas; in that case, it involves a reaction between carbon monoxide and methyl nitrite； Methanol reacts with sodium nitrite to produce nitric oxide – just my personal opinion! !
Methanol reacts with sodium nitrite to produce methyl nitrite
Reply to 1# hncczhangchao: Dehydrogenation is required to explain that their catalysts cannot tolerate hydrogen, or hydrogen concentrations too high in CO (above 1%)； Our catalyst has excellent hydrogen tolerance!
I’d like to hear the details! Don’t reactions occur when the hydrogen content is high in your process?
Sodium nitrite dissolved in water to form a solution is mixed in a certain ratio with methanol and added to the reaction vessel for use; upon the addition of dilute nitric acid, methyl nitrite in gas phase is generated in the system