New industrial process of PTMG catalyzed by solid acid
New industrial process of PTMG catalyzed by solid acid
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DOI：
10.1016/s0920-5861(01)00515-6
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发表时间：
2002-04-01
期刊：
影响因子：
5.3
通讯作者：
Nakanishi, A
中科院分区：
文献类型：
--
作者：
Setoyama, T;Kobayashi, M;Nakanishi, A
研究了乙酸酐存在下固体酸催化四氢呋喃的聚合反应。适中的Lewis酸催化剂产生所需的具有足够M-n的PTME(PTMG-乙酸酯)。沸石材料不适合这种生产，因为它是联产的高相对分子质量的PTME。从这方面来看，混合氧化物材料表现出良好的性能，因为只有这些材料才具有所需的酸性特性。传质研究表明，载体的孔径大小和活性中心的均一性很重要。它们对M-n和M-w/M-n的影响非常显著。利用这些成果建立了商业化技术。(C)2002 Elsevier Science B.V.保留所有权利。
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.