Aliphatic amine and nitrile synthesis through catalytic CO hydrogenation in the presence of ammonia
AssigneeWashington State University
InventorsNorbert Kruse, Hafsa Karroum, Viacheslav Iablokov
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Abstract
A process for manufacturing aliphatic amines and nitriles by using the Fischer Tropsch synthesis (FTS), in the production of chain-lengthened hydrocarbons from CO and H2 and their terminal nitrogen functionalization using ammonia. The method can include activating a catalyst with a feed gas, wherein the feed gas comprises H2/CO mixtures; providing a temperature between 180° C. and 300° C. under a pressure between 1 bar to 25 bar; wherein the nitrogenates include at least one aliphatic amine and/or nitrile; and setting or adjusting the H2/CO ratio to selectively synthesize amines and/or nitriles over other nitrogen containing compounds.
Claims26
A reactor-based hydrogenation process for producing nitrogen containing hydrocarbons, comprising
- activating one or more cobalt-based catalysts with a synthesis gas comprising carbon monoxide (CO) and hydrogen (H2) to form Co2C on one or more activated cobalt-based catalysts;
- reacting the CO and H2 under Fischer-Tropsch reaction conditions in a presence of ammonia and the one or more activated cobalt-based catalysts to produce at least one aliphatic amine and/or nitrile, and
- during reacting, controlling a ratio of the H2 to the CO to 0.3:1 to 7:1 to selectively form the at least one aliphatic amine and/or nitrile.
A method to catalytically synthesize chain-lengthened hydrocarbons with terminal nitrogen functionalization, comprising:
- activating a cobalt-based catalyst with a feed gas, wherein the feed gas comprises carbon monoxide (CO) and hydrogen (H2), and the activation forms Co2C on the cobalt-based catalyst,
- wherein the activating step includes performing a reaction at a first H2/CO ratio of 0.3:1 up to 0.5:1 for at least 24 hours in a presence of a promoter in order to generate the Co2C;
- providing a temperature between 180° C. and 300° C. under a pressure between 1 bar to 25 bar in a reaction vessel containing the activated cobalt based-catalyst;
- and
- combining ammonia with the CO and the H2 in the reaction vessel and reacting the CO and the H2 to produce nitrogen-containing compounds which comprises at least one aliphatic amine and/or nitrile.
Dependencies are inferred from the claim text.