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Role of Recrystallization in Alkaline Treatment on the Catalytic Activity of 1‐Butene Epoxidation
Author(s) -
Zuo Yi,
Yang Liqian,
Jiang Xiao,
Ma Mengtong,
Wang Yanli,
Liu Min,
Song Chunshan,
Guo Xinwen
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202001480
Subject(s) - triethanolamine , catalysis , recrystallization (geology) , chemistry , dissolution , propylamine , 1 butene , chemical engineering , amine gas treating , organic chemistry , analytical chemistry (journal) , biology , paleontology , engineering
Two alkylol amines, which were ethanolamine (EOA) and triethanolamine (TEOA), were used to posttreat nanosized titanium silicalite‐1 (TS‐1) to improve its catalytic activity for 1‐butene epoxidation. Comparative studies were conducted to clarify the influences of the EOA and TEOA concentrations on the physicochemical properties through detailed characterization. EOA treatment can dissolve the framework Si, [SiO 4 ], on the external surface of TS‐1, generating some macropores. TEOA serves as structure‐directing agent to form MFI topology other than the dissolution of [SiO 4 ], and promotes the recrystallization of [SiO 4 ], forming new TS‐1 particles over the external surface. The two treatments can both improve the catalytic activity of 1‐butene epoxidation, but the samples treated with TEOA exhibit better catalytic stability. This can be attributed to the characteristic recrystallization of [SiO 4 ] in the case of TEOA treatment, stabilizing the structure of TS‐1 and maintaining more framework Ti and intercrystal space.