发明授权
- 专利标题: Process for producing sodium and zinc pyrithione
- 专利标题(中): 吡啶硫酮钠和锌的制备方法
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申请号: US372510申请日: 1982-04-28
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公开(公告)号: US4396766A公开(公告)日: 1983-08-02
- 发明人: Douglas A. Farmer, Jr. , Lawrence E. Katz
- 申请人: Douglas A. Farmer, Jr. , Lawrence E. Katz
- 申请人地址: CT New Haven
- 专利权人: Olin Corporation
- 当前专利权人: Olin Corporation
- 当前专利权人地址: CT New Haven
- 主分类号: C07D213/89
- IPC分类号: C07D213/89
摘要:
Disclosed is a process for producing a zinc pyrithione product having an acceptable white or off-white color and containing substantially no undesired 2-hydroxypyridine-N-oxide or metal salt complexes thereof, by(1) making sodium pyrithione by reacting a 2-halopyridine-N-oxide with sodium hydrosulfide and sodium carbonate (or a mixture of sodium carbonate and sodium hydroxide) under selected addition temperatures and reaction temperatures and in selected mole ratios; followed by(2) making zinc pyrithione by reacting the sodium pyrithione with a zinc salt.
公开/授权文献
- US5625889A RF sniffer module and method with a self-test circuit 公开/授权日:1997-04-29
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