SBA-15 as a Support for Nickel-Based Catalysts for Polymerization Reactions

Journal of the Brazilian Chemical Society

Balzer, Rosana¹  Schwanke, Anderson J.²  Favero, Cristiano³ 

[1] Universidade Federal do Paraná, Palotina, Brazil;Universidade Federal do Rio Grande do Norte, Natal, Brazil;Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

关键词: SBA-15;    mesoporous;    morphological control;    polymerization.;   

DOI  :  10.21577/0103-5053.20170144

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Two mesoporous SBA-15 materials with different morphologies (spherical and fiber-shaped) were synthesized and evaluated as supports for nickel-based catalysts for polymerization reactions. The supports were pretreated with trimethylaluminum (TMA), and the catalyst dibromo-bis(4-amino-2,3,5,6-tetramethylimino)acenaphthene nickel(II) was attached to the supports and activated with TMA or MAO (methylaluminoxane). Characterization showed that the insertion of cetyltrimethylammonium bromide (CTABr) as a cosurfactant led to spherical SBA-15 with a decrease in particle and pore sizes to 4.8 nm compared to 6.5 nm in traditional fiber-shaped SBA-15. The spherical SBA-15 showed thicker walls than the fiber-shaped SBA-15, attributed to the increase in functional groups of the cosurfactant. The different spherical and fiber-shaped morphologies did not show any significant difference in the productivity of polyethylene. The catalyst supported on spherical SBA-15 materials showed 58% productivity compared to its homogeneous analogue using TMA as a cocatalyst.

【 授权许可】

CC BY