【発明の名称】クロロテトラフルオロエタンとオクタフルオロシクロブタンとの混合物の製造方法

Title:

【発明の名称】クロロテトラフルオロエタンとオクタフルオロシクロブタンとの混合物の製造方法

Document Type and Number:

Japanese Patent JP2848980

Kind Code:

B2

Abstract:

A process for the preparation of mixtures of chlorotetrafluoroethane and octafluorocyclobutane from the gas stream from the pyrolysis of chlorodifluoromethane at temperatures above 600 DEG C. is described in which the principal constituents tetrafluoroethylene and hexafluoropropylene as well as hydrogen chloride are removed in advance. The mixtures are obtained by withdrawal as a side fraction during the rectifying distillation of the residue remaining, a clean separation of the perfluorocyclobutenes advantageously taking place. The mixtures are used for obtaining hexafluoropropylene by pyrolysis.

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Inventors:

TOOMASU SHETSUTORE
HERUBERUTO UEEBERU
UERUNERU DOSUTORERU
KAARU RETSUTENBETSUKU

Application Number:

JP7905291A

Publication Date:

January 20, 1999

Filing Date:

April 11, 1991

Export Citation:

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Assignee:

DEYUNEON GMBH

International Classes:

C07C17/38; B01D3/14; C07C17/00; C07C17/383; C07C19/08; C07C19/12; C07C23/06; (IPC1-7): C07C19/08; C07C17/38; C07C23/06

Attorney, Agent or Firm:

Mitsufumi Esaki (2 others)

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