发明授权
- 专利标题: Purification of fluorinated carboxylic acids
- 专利标题(中): 氟化羧酸的纯化
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申请号: US50874申请日: 1993-04-21
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公开(公告)号: US5312935A公开(公告)日: 1994-05-17
- 发明人: Ludwig Mayer , Gernot Lohr
- 申请人: Ludwig Mayer , Gernot Lohr
- 申请人地址: DEX Frankfurt am Main
- 专利权人: Hoechst Aktiengesellschaft
- 当前专利权人: Hoechst Aktiengesellschaft
- 当前专利权人地址: DEX Frankfurt am Main
- 优先权: DEX4213154 19920422
- 主分类号: C07C51/44
- IPC分类号: C07C51/44 ; C07C51/487 ; C07C53/21 ; C02F1/72
摘要:
Fluorinated carboxylic acids which do not have the required purity for use as emulsifier in the polymerization of fluorinated monomers can, if necessary after prior de-watering, be treated with oxidants, whereupon the isolation of the pure product is carried out by crystallisation or, preferably, by distillation.
公开/授权文献
- US4811873A Self-stripping pleating apparatus 公开/授权日:1989-03-14
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