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