发明名称 |
OXIDATION-RESISTANT CATION-EXCHANGE RESINS |
摘要 |
Cation-exchange resins are provided which have improved resistance to copolymer degradation caused by oxidizing agents like molecular oxygen. The resins are prepared by functionalizing a plurality of certain cross-linked copolymer beads with cation-exchange groups. The cross-linked copolymer beads are prepared from a para-substituted monovinyl aromatic monomer comprising an aromatic ring substituted with an oxidation-stabilizing moiety in a position para to a polymerizable vinyl moiety. The oxidation-stabilizing moiety is substantially inert during substitution of the copolymer beads with the cation-exchange functional groups, which avoids substitution at the para position. Exemplary of such para-substituted monovinyl aromatic monomers are para-methylstyrene, para-ethylstyrene, and para-chlorostyrene. The cation-exchange resins are capable of being used in a separation process for longer periods of time without detrimental increases in bed pressure drops, loss of operating capacity, and leaching of organic contaminants. 37,528-F
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申请公布号 |
CA2062481(A1) |
申请公布日期 |
1992.09.08 |
申请号 |
CA19922062481 |
申请日期 |
1992.03.06 |
申请人 |
DOW CHEMICAL COMPANY (THE) |
发明人 |
DHINGRA, YOG R.;VAN TOL, PAUL R. |
分类号 |
B01J39/20;C08F12/00;C08F212/04;C08F212/34;(IPC1-7):C08F212/14;C08F220/00;C08F230/00;C08F228/02 |
主分类号 |
B01J39/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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