- 专利标题: Resins having improved exchange kinetics
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申请号: US821524申请日: 1992-01-14
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公开(公告)号: US5141965A公开(公告)日: 1992-08-25
- 发明人: William C. Pike
- 申请人: William C. Pike
- 申请人地址: MI Midland
- 专利权人: The Dow Chemical Company
- 当前专利权人: The Dow Chemical Company
- 当前专利权人地址: MI Midland
- 主分类号: B01J41/04
- IPC分类号: B01J41/04 ; B01J41/14 ; B01J45/00
摘要:
Disclosed are novel ion-exchange and chelate-exchange resins having improved exchange kinetics for separating chemical species from liquids. The resins are prepared from copolymer beads consisting of a monovinyl aromatic monomer and a cross-linking monomer. The copolymer beads are functionalized such that weak-base exchange moieties are substituted at haloalkylated sites which are most accessible to diffusion into the beads, while hydrophilic, strong-base exchange moieties are substituted at haloalkylated sites which are least accessible to diffusion. The resins have improved exchange kinetics due to shortened diffusion path lengths for the chemical species being separated and improved diffusion into the resin beads due to the hydrophilic, strong-base exchange moieties.
公开/授权文献
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