JM Davy’s hydrogenolysis technology centres on a vapour-phase reaction between hydrogen gas (H2) and a carbonyl compound in the presence of a heterogeneous catalyst.
As the hydrogen gas passes through a loop, it vaporises the liquid feed then reacts with it to produce crude product in a simple, continuous process.
Liquid reactant enters the top of the vaporiser. A hot H2-rich gas stream simultaneously enters the vessel’s base. As this H2 gas rises it vaporises the liquid reactant descending through the vessel.
The resulting H2 gas and reactant vapour overheads then proceed to the hydrogenolysis reactor, in which they flow co-currently as they react to form product vapour.
The hydrogenolysis reaction proceeds in the presence of a fixed catalyst bed. As the solid catalyst is fixed in the reaction vessel, there is no need for catalyst separation prior to further downstream processing.
The hydrogenolysis product is cooled and condenses out of the H2 gas cycle as a crude liquid product.
The H2 gas recirculates via a recycle circulator, with make-up H2 added to replace that consumed in the hydrogenolysis reaction.
This recycle gas then reheats in a heater, before feeding into the bottom of the hydrogenolysis vaporiser.