Process for purifying octafluorocyclobutane, process for preparing the same, and use thereof

   
   

A process for purifying octafluorocyclobutane according to the present invention is characterized by contacting a crude octafluorocyclobutane containing impurities with an impurity decomposing agent under elevated temperature and then with an adsorbent to substantially remove the impurities from the crude octafluorocyclobutane. According to the purification process or preparation process of octafluorocyclobutane of the present invention, the impurities such as fluorocarbon can be substantially removed and a high-purity octafluorocyclobutane can be easily obtained. The octafluorocyclobutane obtained by the purification process of the present invention is substantially free of impurities and therefore, can be used as an etching or cleaning gas for use in the production process of a semiconductor device or the like.

Um processo para purifying o octafluorocyclobutane de acordo com a invenção atual é caracterizado contatando um octafluorocyclobutane cru que contem impurezas com um agente decomposing da impureza sob a temperatura elevated e com um adsorbent para remover então substancialmente as impurezas do octafluorocyclobutane cru. De acordo com o processo do purification ou o processo da preparação do octafluorocyclobutane da invenção atual, as impurezas tais como o fluorocarbon podem substancialmente ser removidas e um octafluorocyclobutane high-purity pode fàcilmente ser obtido. O octafluorocyclobutane obtido pelo processo do purification da invenção atual está substancialmente livre das impurezas e, pode conseqüentemente ser usado como um gás gravura a água-forte ou da limpeza para o uso no processo de produção de um dispositivo de semicondutor ou do gosto.

 
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