Process for the production of oligomerized olefins

A process for the production of oligomerized olefins comprising the following steps a) to e):

• a) purification of an organic composition (OC1) comprising at least one alkane, at least one olefin and at least one compound containing oxygen and/or sulfur wherein (OC1) is fed into at least one adsorber in order to obtain an organic composition (OC2) comprising at least one alkane, at least one olefin and a reduced amount of at least one compound containing oxygen or sulfur compared to the respective amount in organic composition (OC1),
• b) oligomerization of organic composition (OC2) in the presence of a catalyst, wherein at least one of the olefins of (OC2) is at least partially oligomerized, obtaining an organic composition (OC3) comprising a reduced amount of at least one olefin and an increased amount of at least one oligomerized olefin, compared to the respective amounts in (OC2);
• c) distillation of organic composition (OC3) in a distillation column (D1), wherein
• i) an organic composition (OC4) is obtained from the upper part of (D1) and (OC4) comprises at least one alkane, at least one olefin and a reduced amount of at least one oligomerized olefin compared to the respective amount in (OC3),
• ii) an organic composition (OC5) is obtained from the lower part of (D1) and (OC5) comprises at least 80% by weight, preferably at least 95% by weight of the at least one oligomerized olefin present in organic composition (OC3);
• d) hydrogenation of organic composition (OC4) to obtain an organic composition (OC11) comprising at least one alkane and a further reduced amount of the at least one olefin or of the at least one oligomerized olefin compared to organic composition (OC4), and
• e) regeneration of an adsorber (A1) employing organic composition (OC11) as regeneration media.