Quaternary carboxylate compositions for extracting c1 to c4 carboxylic acids from aqueous streams

• Main Authors: HARDACRE CHRISTOPHER, LIU JINGYI, SINK CHESTER WAYNE, QI FEI, HEMBRE ROBERT THOMAS, BARNICKI SCOTT DONALD
• Format: Patent
• Language: Chinese; English
• Published: 17.10.2017
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

This invention relates to solvents for extracting C1 to C4 carboxylic acids from aqueous streams. More specifically, the extraction solvents include one or more salts composed of a tetraalkylphosphonium cation and a carboxylate anion. The extraction solvents may further include one or more non-ionic liquid organic solvents as an enhancer. The extraction solvents are useful for extracting aqueous mixtures containing one or more lower carboxylic acids, such as monocarboxylic acids, alkoxycarboxylic acids, and halogen-containing carboxylic acids. 本发明涉及用于从水性料流中萃取C至C羧酸的溶剂。更具体地，该萃取溶剂包含种或多种由四烷基鏻阳离子和羧酸根阴离子构成的盐。该萃取溶剂可进步包含种或多种非离子液体有机溶剂作为增强剂。该萃取溶剂可用于萃取含有种或多种低级羧酸，如单羧酸、烷氧基羧酸和含卤素的羧酸的水性混合物。