Quaternary Carboxylate Compositions for Extracting C1 to C4 Carboxylic Acids from Aqueous Streams
申请人:Eastman Chemical Company
公开号:US20160175737A1
公开(公告)日:2016-06-23
This invention relates to solvents for extracting C
1
to C
4
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.