Highly Active and Non‐corrosive Catalytic Systems for the Coupling Reactions of Ethylene Oxide and CO2. (12th January 2017)

• Record Type: Journal Article
• Authors: Zhang, Shuyao; Jin, So Jeong; Kim, Young Jin; Hong, Jongki; Lee, Wonwoong; Ryu, Jung‐Bok; Lee, Je Seung; Kim, Hoon Sik
• Is Part Of: Bulletin of the Korean Chemical Society. Volume 38:Number 2(2017)
• Page Start: 219
• Page End: 223
• Publication Date: 2017-01-12
• Subjects: CO2 -- Coupling reaction -- Cyclic carbonates -- Ethylene oxide -- Ionic liquids -- LiBr -- Corrosion; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/bkcs.11068
• Languages: English
• ISSNs: 0253-2964

Abstract

Abstract : Lithium halide‐based molten salts (LiX‐[BMIm]Br) synthesized from the reactions of lithium halides (LiX, X = Cl or Br) with 1‐butyl‐3‐methylimidazolium bromide ([BMIm]Br), and their catalytic performances and corrosivities were tested for the coupling reactions of ethylene oxide with carbon dioxide to produce ethylene carbonate. The activity of a molten salt was influenced with the change of halide ion. At a fixed molar amount of LiX, the activity of LiX‐[BMIm]Br increased with increasing molar ratio of LiX/[BMIm]Br up to 1–1.25, and then decreased thereafter. Fast atom bombardment mass spectral analysis of LiBr‐[BMIm]Br, obtained by dissolving LiBr in [BMIm]Br in a 1:1 molar ratio, implies that [Li a X a +1 ] − are active species for the carboxylation of ethylene oxide with LiX‐[BMIm]Br. The corrosion test toward carbon steel coupons demonstrates that all the Cl‐containing molten salts are corrosive, whereas the salts without containing Cl − are non‐corrosive under the carboxylation condition. Abstract :