Synthesis of 2,5-dimethylhexene by isobutene dimerization with H_2S co-feeding

DOI IR (HANDLE) Web Site 30 References Open Access
  • Watanabe, Ryo
    Department of Applied Chemistry and Biochemical Engineering, Graduate School of Engineering, Shizuoka University
  • Tanikawa, Riku
    Department of Applied Chemistry and Biochemical Engineering, Graduate School of Engineering, Shizuoka University
  • Kurosaki, Arisa
    Department of Applied Chemistry and Biochemical Engineering, Graduate School of Engineering, Shizuoka University
  • Oshima, Kazumasa
    Department of Chemical Engineering, Faculty of Engineering, Kyushu University
  • Kishida, Masahiro
    Department of Chemical Engineering, Faculty of Engineering, Kyushu University
  • Verma, Priyanka
    Department of Applied Chemistry and Biochemical Engineering, Graduate School of Engineering, Shizuoka University
  • Fukuhara, Choji
    Department of Applied Chemistry and Biochemical Engineering, Graduate School of Engineering, Shizuoka University

Bibliographic Information

Other Title
  • Synthesis of 2,5-dimethylhexene by isobutene dimerization with H<sub>2</sub>S co-feeding

Description

This study investigates the effect of hydrogen sulfide (H_2S) co-feeding on the synthesis of 2,5-dimethyl-1-hexene, 2,5-dimethyl-2-hexene, and 2,5-dimethylhexane (2,5-DMHs), useful compounds, using the dimerization of isobutene under mild pressure conditions. The dimerization of isobutene did not proceed in the absence of H_2S, whereas the desired products of 2,5-DMHs were produced under H_2S co-feeding conditions. The effect of reactor size on the dimerization reaction was then examined, and the optimal reactor was discussed. To enhance the yield of 2,5-DMHs, we changed the reaction conditions of the temperature, molar ratio of isobutene to H_2S (iso-C_4^=/H_2S) in the feed gas, and the total feed pressure. The optimum reaction condition was at 375 °C and 2/1 of iso-C_4^=/H_2S. The product of 2,5-DMHs monotonously increased by an increment of total pressure from 1.0 to 3.0 atm with a fixed iso-C_4^H_2S ratio at 2/1.

Journal

  • RSC Advances

    RSC Advances 13 (21), 14097-14101, 2023-05-10

    Royal Society of Chemistry (RSC)

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