In {HEAD ~ the production} of {TAIL ~ amines} from nitriles where the nitriles are hydrogenated under pressure in the presence of a Raney Nickel Catalyst using 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 { HEAD ~ the production } of { TAIL ~ amines } from nitriles where the nitriles are hydrogenated under pressure in the presence of a Raney Nickel Catalyst using 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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