The chemical reaction heat generated when hexamethylenediamine HDA reacts with phosgene to produce hexamethylenediisocyanate HDI
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I would like to ask fellow sailors: Is the chemical reaction between hexamethylenediamine HDA and phosgene to produce hexamethylenediisocyanate HDI an exothermic or endothermic reaction, and what is the amount of heat released in this reaction? Thank you for your advice!
I have been paying attention to this issue, and there is still no answer to it. It seems there is no available data; it is recommended to use thermodynamic values for estimation. Calculate it by subtracting the enthalpy of formation of the reactants from the enthalpy of formation of the products. I recall having read a paper that calculated the enthalpy of formation of TDI; there were no data available for the enthalpies of formation of the substances in the reaction equation, so these values were estimated using the group contribution method. It can be used as a reference!
Hehe, what a coincidence – the facility next to us is China’s only HDI production site. It must be a exothermic reaction; I need to check the heat generated by that reaction
Do you have the reaction heat data for the HDA reaction with phosgene?
Original poster, do you know what the heat of reaction is now?