Daikin Industries, Ltd.

E.i. Dupont De Nemours and Company

Shuji Itatani

Takuya Ichida

Steven Henry Swearingen

Noriaki Shibata

Mihoko Ohashi

Ta-Wei Fu

Atsuko Tai

Kaori Ohno

A treatment method of at least partially removing impurities from a composition containing a fluorine-containing organic acid having the carbon number of 2 to 7 and impurities, the method including a flocculant mixing step of mixing the composition and a flocculant; and a separating step of separating a mixed phase obtained at the mixing step into a solid phase and a liquid phase.

Treatment method of composition containing fluorine-containing organic acid having carbon number of 2 to 7 and impurities

A process for preparing a fluorocarboxylic acid, which includes a dehydration step of removing from a mixture containing a fluorocarboxylic acid and water at least a part of the water to obtain a dehydrated fluorocarboxylic acid solution, and a purification step of purifying the dehydrated fluorocarboxylic acid solution.

Process for preparing fluorocarboxylic acid

A fluorocarboxylic acid preparation process continuously carries out acidification reaction treatment and washing treatment, and includes subjecting a fluorocarboxylate-containing aqueous solution to acidification reaction treatment in the presence of sulfuric acid so as to form a sulfate-containing fluorocarboxylic acid phase; and subjecting the fluorocarboxylic acid phase to washing treatment using an aqueous sulfuric acid solution.

Process for preparing fluorocarboxylic acids

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Settsu, Japan

Shuji Itatani