Method for purification of a hydrocarbon stream containing olefin and amine

A method for purification of a hydrocarbon stream containing linear alpha olefins, isomers thereof and at least one organic amine, comprising:

• removing a major amount of the organic amine from the hydrocarbon stream by distillation, wherein the distillation is carried out so that, together with the amine, between 5% and 95 wt % of the isomers, based on the total amount of the isomers in the hydrocarbon stream, are removed from the hydrocarbon stream in an amine/isomer-rich fraction of the distillation;
• removing the organic amine from the amine/isomer-rich fraction by converting with an acid, forming an amine salt, and extracting the amine-salt formed into an aqueous phase;
• isolating the organic amine;
• and
• recycling the organic amine to a reaction section of an oligomerization plant;
• wherein the linear alpha olefins, isomers and the amine have boiling points under atmospheric pressure which differ by at most 3° C.

A method for purification of a hydrocarbon stream containing linear alpha olefins, isomers thereof and at least one organic amine, comprising:

• removing a major amount of the organic amine from the hydrocarbon stream by distillation, wherein the distillation is carried out so that, together with the amine, between 5% and 95 wt % of the isomers, based on the total amount of the isomers in the hydrocarbon stream, are removed from the hydrocarbon stream in an amine/isomer-rich fraction of the distillation;
• and
• recycling the amine/isomer-rich fraction to a reaction section of an oligomerization plant, without prior separation;
• wherein the linear alpha olefins, isomers and the amine have boiling points under atmospheric pressure which differ by at most 3° C.