PROCESS FOR OLIGOMERIZATION OF OLEFINS WITH OPTIMIZED DISTILLATION

• Main Authors: NIKLAS PAUL, STEPHAN PEITZ, TANITA VALERIE SIX, STOCHNIOL GUIDO, MATTHIAS RIX ARMIN
• Format: Patent
• Language: English; Japanese
• Published: 01.03.2021
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

To provide a process for oligomerization of olefins which entails the lowest possible capital costs.SOLUTION: There is provided a process for oligomerizing C2- to C8-olefins. The C2- to C8-olefins containing a proportion of more than 10 wt.% of alkanes is subjected to oligomerization in at least one reactor using a heterogeneous catalyst with a conversion of 60 to 95%, and a resultant reaction mixture is distilled in the at least one distillation column to separate the formed oligomers from a residual reaction mixture containing at least unconverted reactant olefins. The distillate formed in the at least one distillation column is at least partially passed to one or more reactors of the same or preceding reaction stage, wherein a concentration of the oligomers in the distillate from the last distillation column of the last reaction stage is less than 100 ppmw, while a concentration of the oligomers in the distillate from the preceding one or more distillation columns is in a range from more than 200 ppmw to 7000 ppmw.SELECTED DRAWING: None 【課題】できるだけ資本コストを抑えた、オレフィンのオリゴマー化のプロセスの提供。【解決手段】アルカンを１０質量％より多い比率で含むＣ２〜Ｃ８オレフィンを、転化率が６０〜９５％である不均一系触媒を用いて、少なくとも１つの反応器でオリゴマー化し、かつ少なくとも１つの蒸留カラムで蒸留して、形成されたオリゴマーを、少なくとも未転化の反応物オレフィンを含む残留反応混合物から分離し、前記少なくとも１つの蒸留カラムで形成された前記蒸留物を、少なくとも部分的に、同一又はそれより前の反応段階の１又は複数の反応器に通過させ、ここで、最終反応段階の最終蒸留カラム由来の前記蒸留物のオリゴマーの濃度が、１００ｐｐｍｗ未満であり、それより前の１又は複数の蒸留カラム由来の前記蒸留物のオリゴマーの濃度が２００ｐｐｍｗを超えて７０００ｐｐｍｗまでである、Ｃ２〜Ｃ８オレフィンをオリゴマー化するプロセス。【選択図】なし