In the production of amines from nitriles where the nitriles are hydrogenated under pressure in the presence of a Raney Nickel Catalyst using hydrogen produced from {HEAD ~ methane} and containing CO2, {TAIL ~ a more efficient separation} of the product hexamethylene diamine from the catalyst is obtained by maintaining a specified carbonate concentration 
In the production of amines from nitriles where the nitriles are hydrogenated under pressure in the presence of a Raney Nickel Catalyst using hydrogen produced from { HEAD ~ methane } and containing CO2 , { TAIL ~ a more efficient separation } of the product hexamethylene diamine from the catalyst is obtained by maintaining a specified carbonate concentration
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