PRODUCTION OF HYDROGEN-CONTAINING PENTAFLUOROPROPANES AND HYDROGEN-CONTAINING TETRAFLUOROPROPANES

Title:

PRODUCTION OF HYDROGEN-CONTAINING PENTAFLUOROPROPANES AND HYDROGEN-CONTAINING TETRAFLUOROPROPANES

Document Type and Number:

Japanese Patent JPH02204443

Kind Code:

A

Abstract:

PURPOSE: To produce the title compound useful as a blowing agent, refrigerant, detergent, etc., in high selectivity, in high purity and in high yield by reducing a difluoromethylene group-containing pentafluoropropane with hydrogen in the presence of a hydrogenating catalyst.

CONSTITUTION: A difluoromethylene group-containing pentafluoropropane shown by formula I (n is 0≤-≤2) is reacted with hydrogen in the presence of a hydrogenating catalyst to give a hydrogen-containing pentafluoropropane shown by formula II (n is 1≤-≤3) and a hydrogen-containing tetrafluoropropane shown by formula III (n is 1≤-≤4). For example, 1,1,3-trichloro-1,2,2,3,3- pentafluoropropane, 1,1,1-trichloro-2,2,3,3,3-pentafluoropropane or 1,1- dichloro-2,2,3,3,3-pentafluoropropane is preferable as the difluoromethylene group- containing pentafluoropropane as the starting raw material.

Inventors:

MORIKAWA SHINSUKE
SAMEJIMA SHUNICHI
YOSHITAKE MASARU
ONISHI KEIICHI
TANUMA TOSHIHIRO

Application Number:

JP2374789A

Publication Date:

August 14, 1990

Filing Date:

February 03, 1989

Export Citation:

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Assignee:

ASAHI GLASS CO LTD

International Classes:

B01J23/40; B01J23/30; B01J23/42; B01J23/44; B01J23/46; B01J23/64; B01J23/652; B01J23/656; B01J23/89; C07B61/00; C07C17/00; C07C17/23; C07C19/08; C07C19/10; (IPC1-7): B01J23/40; B01J23/64; B01J23/89; C07B61/00; C07C17/00; C07C19/08

Domestic Patent References:

JPH01149739A

1989-06-12

Attorney, Agent or Firm:

Kenji Izumina

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