发明名称 |
Method of preparing phthalide |
摘要 |
An improvement in a process for preparing phthalide by reacting chlorophthalide with hydrogen in the presence of a catalyst at a temperature between 50 DEG and 350 DEG C., the improvement residing in carrying out the process in the absence of a hydrogen chloride acceptor, flowing the chlorophthalide continuously in fluid form through a solid catalyst bed in a reactor, passing the hydrogen through in such an excess so as to sweep off the hydrogen chloride formed and withdrawing phthalide in fluid form.
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申请公布号 |
US4178295(A) |
申请公布日期 |
1979.12.11 |
申请号 |
US19780902201 |
申请日期 |
1978.05.02 |
申请人 |
DYNAMIT NOBEL AG |
发明人 |
ENGLAENDER, FRITZ;KAPPLER, FRITZ ROBERT |
分类号 |
C07D307/88;(IPC1-7):C07D307/88 |
主分类号 |
C07D307/88 |
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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