METHOD FOR PRODUCING FLUOROALKANESULFONIC ANHYDRIDE

Title:

METHOD FOR PRODUCING FLUOROALKANESULFONIC ANHYDRIDE

Document Type and Number:

WIPO Patent Application WO/2013/080676

Kind Code:

A1

Abstract:

Disclosed is a method for producing fluoroalkanesulfonic anhydride characterized in that fluoroalkanesulfonic acid and diphosphorus pentoxide are reacted while kneading at from 40°C to less than 100°C using a kneader-type reactor having a maximum power of 1.0 kW or higher per 100 L actual capacity and equipped with at least two blades; the resulting fluoroalkylsulfonic anhydride is discharged; and after discharge, the unreacted fluoroalkylsulfonic acid is discharged and recovered while the residue in the reactor is kneaded at a temperature of from 100°C to less than 140°C, and reused as a raw material. This method obtains fluoroalkanesulfonic anhydride at a high yield.

Inventors:

MIYAZAKI TATSUO (JP)
KAWAMOTO HIROMI (JP)
ONO HIROSHI (JP)

Application Number:

PCT/JP2012/076153

Publication Date:

June 06, 2013

Filing Date:

October 10, 2012

Export Citation:

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Assignee:

CENTRAL GLASS CO LTD (JP)

International Classes:

C07C303/00; C07C309/06

Foreign References:

JP2007297359A	2007-11-15
JP2007145815A	2007-06-14
JPH09227498A	1997-09-02
JPH02268148A	1990-11-01
JPH10114734A	1998-05-06
JP2000191631A	2000-07-11
RU2282620C1	2006-08-27
JPH02268148A	1990-11-01
JPH0922749A	1997-01-21
JPH1011473A	1998-01-16
JP2007145815A	2007-06-14
JP2007297359A	2007-11-15
JP2009540068A	2009-11-19
JP2003514961A	2003-04-22

Other References: