发明名称 |
Highly pure tetra:fluoroethane prodn. - from halo-ethane(s) and hydrogen fluoride using chromium oxide contg. catalysts |
摘要 |
<p>is produced by the high temp. vapour phase reaction of a haloethane of formula (I): CX3CH2Y (I) (where each X = Br, Cl or F and Y = Br or Cl) with HF in the presence of a catalyst which is chromium oxide or is at least partially basic chromium fluoride. Used as coolant e.g. for freezing food, as aerosol propellant and porophore for expanded materials. It is obtd. in high purity.</p> |
申请公布号 |
FR2381006(A1) |
申请公布日期 |
1978.09.15 |
申请号 |
FR19780004638 |
申请日期 |
1978.02.17 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES LTD |
发明人 |
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分类号 |
B01J23/00;B01J27/00;C07B61/00;C07C17/00;C07C17/20;C07C17/395;C07C19/08;C07C67/00;(IPC1-7):07C19/08;07C17/20 |
主分类号 |
B01J23/00 |
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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