Impact of Alkali and Alkali‐Earth Cations on Ni‐Catalyzed Dimerization of Butene. Issue 14 (3rd June 2020)

• Record Type: Journal Article
• Authors: Ehrmaier, Andreas; Löbbert, Laura; Sanchez‐Sanchez, Maricruz; Bermejo‐Deval, Ricardo; Lercher, Johannes
• Is Part Of: ChemCatChem. Volume 12:Issue 14(2020)
• Page Start: 3705
• Page End: 3711
• Publication Date: 2020-06-03
• Subjects: Dimerization -- Butene Isomerization -- Nickel -- Silica-Alumina (ASA) -- Cossee-Arlman; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.202000349
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: The presence of alkali (Na + or Li + ) or alkali‐earth (Ca 2+ or Mg 2+ ) cations adjusting the acid‐base properties on amorphous silica‐alumina influences markedly the catalytic properties of supported Ni for 1‐butene dimerization. The low concentration of Brønsted acid sites on these catalysts reduces the double bond isomerization of butene and inhibits the formation of dimethylhexene as primary product. While the alkali and alkali‐earth cations act as weak Lewis acid sites, only Ni 2+ sites are catalytically active for dimerization of 1‐butene. n ‐Octene and methylheptene are formed selectively as primary products; dimethylhexene is a secondary product. The open environment of the Ni 2+ sites does not induce different reaction pathways compared to Ni 2+ in the pores of zeolites. Abstract : Butene dimerization : The presence of alkali (Na + or Li + ) or alkali‐earth (Ca 2+ or Mg 2+ ) cations adjusting the acid‐base properties on amorphous silica‐alumina influences markedly the catalytic properties of supported Ni for 1‐butene dimerization. n‐Octene and methylheptene are formed selectively as primary products; dimethylhexene is a secondary product. The open environment of the Ni 2+ sites does not induce different reaction pathways compared to Ni 2+ in the pores of zeolites.