发明授权
US5210283A Synthesis of tetrahydrofuran polymers using calcined silica-alumina or
beaching earth catalysts
失效
使用煅烧二氧化硅 - 氧化铝或沙滩土催化剂合成四氢呋喃聚合物
- 专利标题: Synthesis of tetrahydrofuran polymers using calcined silica-alumina or beaching earth catalysts
- 专利标题(中): 使用煅烧二氧化硅 - 氧化铝或沙滩土催化剂合成四氢呋喃聚合物
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申请号: US884677申请日: 1992-05-18
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公开(公告)号: US5210283A公开(公告)日: 1993-05-11
- 发明人: Andrew P. Kahn , Robert G. Gastinger , Gangfeng Cai
- 申请人: Andrew P. Kahn , Robert G. Gastinger , Gangfeng Cai
- 申请人地址: DE Wilmington
- 专利权人: ARCO Chemical Technology, L.P.
- 当前专利权人: ARCO Chemical Technology, L.P.
- 当前专利权人地址: DE Wilmington
- 主分类号: C07C43/13
- IPC分类号: C07C43/13 ; C08G65/20
摘要:
Tetrahydrofuran is polymerized in the presence of a carboxylic acid anhydride and a solid acid catalyst that has been calcined at a temperature greater than about 600.degree. C. Calcined bleaching earth catalysts give THF polymer products having a narrow molecular weight distribution; calcining amorphous silica-aluminas improves their activity toward THF polymerization.
公开/授权文献
- US4157244A Gas-cooling method and apparatus 公开/授权日:1979-06-05
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