期刊
CATALYSIS TODAY
卷 73, 期 1-2, 页码 29-37出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0920-5861(01)00515-6
关键词
PTMG; polymerization; mass-transfer; Lewis acid; THF; py-IR
Polymerization of THF catalyzed by solid acid in the presence of acetic anhydride was studied. A moderate Lewis acid catalyst produces required PTME (PTMG-acetate) having adequate M-n. Zeolitic material is not suitable for this production because very high molecular weight PTME is co-produced. From this aspect, mixed oxide materials show good performance because only these have the required acidic character. Mass-transfer study suggests the importance of pore size of support and the homogeneity of active sites. They affect on the M-n and the M-w/M-n strikingly. The commercial technology has established by utilizing these results. (C) 2002 Elsevier Science B.V. All rights reserved.
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