QUATERNARY PHOSPHINATES WITH CO-SOLVENTS FOR EXTRACTING C1 TO C4 CARBOXYLIC ACIDS FROM AQUEOUS STREAMS

This invention relates to solvents for extracting C1 C4 carboxylic acids from aqueous streams. More specifically, the extraction solvents include one or more salts composed of a tetraalkylphosphonium cation and a phosphinate anion. The extraction solvents may further include one or more co-solvents...

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Main Authors SINK, CHESTER, WAYNE, HEMBRE, ROBERT, THOMAS, BARNICKI, SCOTT, DONALD, HARDACRE, CHRISTOPHER
Format Patent
LanguageEnglish
French
Published 23.06.2016
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Summary:This invention relates to solvents for extracting C1 C4 carboxylic acids from aqueous streams. More specifically, the extraction solvents include one or more salts composed of a tetraalkylphosphonium cation and a phosphinate anion. The extraction solvents may further include one or more co-solvents as an enhancer. The co-solvents may be selected from higher carboxylic acids, ethers, esters, ketones, aromatic hydrocarbons, chlorinated hydrocarbons, and nitriles. The extraction solvents are useful for extracting aqueous mixtures containing one or more lower carboxylic acids, such as monocarboxylic acids and organofluorine carboxylic acids. L'invention concerne des solvants d'extraction d'acides carboxyliques en C1 à C4 de courants aqueux. Plus spécifiquement, les solvants d'extraction comprennent un ou plusieurs sels composés d'un cation tétraalkylphosphonium et d'un anion phosphinate. Les solvants d'extraction peuvent en outre comprendre un ou plusieurs co-solvants en tant qu'activateur. Les co-solvants peuvent être sélectionnés parmi des acides carboxyliques supérieurs, des éthers, des esters, des cétones, des hydrocarbures aromatiques, des hydrocarbures chlorés, et des nitriles. Les solvants d'extraction sont utiles pour extraire des mélanges aqueux contenant un ou plusieurs acides carboxyliques inférieurs, tels que les acides monocarboxyliques et les acides carboxyliques organofluorés.
Bibliography:Application Number: WO2015US66572