发明名称 |
METHOD PREPARING BIS-FLUOROMETHYL ETHER AND METHOD OF PREPARING DIFLUOROMETHANE |
摘要 |
FIELD: chemical industry. SUBSTANCE: bis-fluoromethyl ether is prepared by reaction of formaldehyde and hydrogen fluoride in reactor- rectification vessel. The reactor-rectification vessel is preferably reactor rectification column in which formaldehyde and hydrogen fluoride move in counter flow towards each other. Bis-fluoromethyl ether is converted into difluoromethane by heating bis-fluoromethyl ether at elevated temperature in the presence of metal, metal oxide, metal fluoride or metal oxyfluoride base catalyst. EFFECT: more efficient preparation method. 10 cl, 4 dwg, 6 tblo |
申请公布号 |
RU2102376(C1) |
申请公布日期 |
1998.01.20 |
申请号 |
RU19940026908 |
申请日期 |
1992.10.30 |
申请人 |
IMPERIAL KEMIKAL INDASTRIZ PLS |
发明人 |
DZHON STJUART MARTIN;TOMAS EHNTONI RAJAN;REHCHEL ANNE SPUNSER;DZHON STJUART MARTIN;TOMAS EHNTONI RAJAN;REHCHEL ANNE SPUNSER |
分类号 |
C07C19/08;C07B61/00;C07C17/361;C07C41/01;C07C41/05;C07C43/12;(IPC1-7):C07C43/12 |
主分类号 |
C07C19/08 |
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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