发明名称 |
Process for crystallizing chroman-I from an impure mixture |
摘要 |
A process is employed for the isolation and crystallization of chroman-I from an impure mixture, by heating the crude mixture, mixing acetone with the hot mixture to obtain a solids-free solution and crystallizing the chroman-I from the solution. Repeated cycles of the process yield high purity chroman-I in good yield.
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申请公布号 |
US5773633(A) |
申请公布日期 |
1998.06.30 |
申请号 |
US19950509890 |
申请日期 |
1995.08.01 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
KISSINGER, GAYLORD MICHAEL |
分类号 |
C07D311/74;C07D311/58;(IPC1-7):C07D311/58 |
主分类号 |
C07D311/74 |
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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