Advances in amination
AssigneeHuntsman Petrochemical Corporation
InventorsWei-Yang Su, Wheeler C. Crawford, John M. Larkin
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Abstract
Inclusion of a branched alcohol in the catalytic hydrogenation reaction involving an aliphatic nitro compound dramatically increases the efficiency of the conversion of nitro groups into amino groups. This discovery is of particular value in the production of polyalkyleneamines via nitration of a polyalkene, such as a polybutene, and its subsequent reduction. The polyalkyleneamines so produced are useful as dispersant additives for motor oils and fuels.
Claims6
In a two step process for producing an amine compound involving a first nitration step wherein a polyalkene is nitrated in the presence of a hydrocarbon solvent, and a second catalytic hydrogenation step in which the nitrated polyalkene from the first step, its accompanying solvent, and a catalyst are charged to a hydrogenation apparatus for purposes of reduction, wherein the improvement comprises conducting the hydrogenation step in the presence of an effective reduction-enhancing amount of a branched alcohol.
Dependencies are inferred from the claim text.