JPS6461443A - Production of fluorocarboncarboxylic acid - Google Patents
Production of fluorocarboncarboxylic acidInfo
- Publication number
- JPS6461443A JPS6461443A JP21519787A JP21519787A JPS6461443A JP S6461443 A JPS6461443 A JP S6461443A JP 21519787 A JP21519787 A JP 21519787A JP 21519787 A JP21519787 A JP 21519787A JP S6461443 A JPS6461443 A JP S6461443A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- koh
- acid
- formula
- salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE:To obtain the aimed high-purity compound at a low cost, by hydrolyzing a fluorocarboxylic acid chloride, then adding a KOH circulating solution, adding an alkaline metal hydroxide, etc., to the resultant salt, recirculating the obtained solution as a circulating solution and decomposing the above- mentioned salt with an acid. CONSTITUTION:A fluorocarboxylic acid chloride production formula I (Rf is 1-10C saturated or unsaturated perfluoroalkyl; m is 1 or 2) is hydrolyzed with water and a KOH circulation solution is added to neutralize the hydrolyzate solution. The neutralized solution is subsequently concentrated and cooled to deposit and separate a salt expressed by formula II. An alkaline (earth) metal hydroxide, such as NaOH or Ca(OH)2, is added to the separated solution to separate the deposited fluoride. KOH is then added to the solution after separating the deposited fluoride and recirculated as the KOH circulating solution. The obtained salt expressed by formula II is then decomposed with an acid, such as sulfuric acid, to recover the obtained fluorocarboxylic acid by distillation, etc. Thereby the aimed high-purity compound, expressed by formula III and useful as a raw material for various organic compounds is obtained.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62215197A JPH07100676B2 (en) | 1987-08-31 | 1987-08-31 | Method for producing fluorcarbone carboxylic acid |
US07/237,072 US4927962A (en) | 1987-08-31 | 1988-08-29 | Process of preparing fluorocarbon carboxylic or sulfonic acid from its fluoride |
DE3829409A DE3829409C2 (en) | 1987-08-31 | 1988-08-30 | Process for the preparation of fluorocarboxylic acids or -sulfonic acids |
IT8821796A IT1226426B (en) | 1987-08-31 | 1988-08-31 | Satd. or unsatd. per:fluoro-carbon carboxylic or sulphonic acid prodn. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62215197A JPH07100676B2 (en) | 1987-08-31 | 1987-08-31 | Method for producing fluorcarbone carboxylic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6461443A true JPS6461443A (en) | 1989-03-08 |
JPH07100676B2 JPH07100676B2 (en) | 1995-11-01 |
Family
ID=16668294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62215197A Expired - Fee Related JPH07100676B2 (en) | 1987-08-31 | 1987-08-31 | Method for producing fluorcarbone carboxylic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07100676B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016021441A1 (en) * | 2014-08-08 | 2016-02-11 | ユニマテック株式会社 | Mixture of polyfluoroalkene carboxylic acid or salt thereof and production method therefor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2996147B1 (en) * | 2012-10-03 | 2015-05-29 | Rhodia Operations | PROCESS FOR TREATING FLUID ACID |
-
1987
- 1987-08-31 JP JP62215197A patent/JPH07100676B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016021441A1 (en) * | 2014-08-08 | 2016-02-11 | ユニマテック株式会社 | Mixture of polyfluoroalkene carboxylic acid or salt thereof and production method therefor |
US9873654B2 (en) | 2014-08-08 | 2018-01-23 | Unimatec Co., Ltd. | Mixture of polyfluoroalkene carboxylic acids or salts thereof and process for producing the same |
Also Published As
Publication number | Publication date |
---|---|
JPH07100676B2 (en) | 1995-11-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |