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1. 发明专利

JPS57126430A Preparation of lower perfluoroalkane 失效
标题翻译：较低的全氟烷烃的制备
公开(公告)号：JPS57126430A
公开(公告)日：1982-08-06
申请号：JP963081
申请日：1981-01-27
申请人： Du Pont Mitsui Fluorochem Co Ltd , E I Du Pont De Nemours & Co
发明人： COUTURE MAURICE J , HAYASHI DAN
IPC分类号： C07C17/02 , C07C17/00 , C07C17/04 , C07C17/361 , C07C19/08 , C07C21/18 , C07C67/00
CPC分类号： C07C17/04 , C07C17/361 , C07C19/08
摘要： PURPOSE: To obtain the titled compound, i.e. CF
4 and C
2 F
6 , useful as a cryogenic refrigerant, electrical insulating gas, etc., safely, in high purity, yield and conversion, with simple process, by heating a mixed gas of C
2 F
4 and CO
2 having a specific mixing ratio at high temperature.
CONSTITUTION: Lower perfluoroalkane, i.e. CF
4 (perfluoromethane), C
2 F
6 (perfluoroethane) or their mixture, can be prepared by heating a mixture of C
2 F
4 (tetrafluoroethylene) and CO
2 at >900°C, pref. 950W1,500°C under positive or reduced pressure. The molar ratio of C
2 F
4 /CO
2 is ≤4/1, pref. 3/1W1/10.
EFFECT: Since CO
2 acts as the diluent of C
2 F
4 , the explosion and carbonization can be prevented. There is no carbon deposition to the reaction tube, and little clogging of the reactor and lowering of the heat transfer coefficient. The troublesome operations such as cleaning of the reaction tubes are not necessary.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：通过加热C2F4和二氧化碳的混合气体，以简单的方法获得用作低温制冷剂，电绝缘气体等的标题化合物即低温制冷剂，电绝缘气体等，以高纯度，产率和转化率，高温下的比混合比。构成：低级全氟烷烃，即CF4（全氟甲烷），C2F6（全氟乙烷）或其混合物可以通过在> 900℃，优选加热C2F4（四氟乙烯）和CO 2的混合物来制备。在正压或低压下为950-1,500℃。 C2F4 / CO2的摩尔比为≤4/ 1，优选。 3 / 1-1 / 10。效果：由于CO2作为C2F4的稀释剂，因此可以防止爆炸和碳化。反应管没有碳沉积，反应器堵塞少，传热系数降低。不需要诸如清洁反应管的麻烦的操作。

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