Hydrophobic functional liquids based on trioctylphosphine oxide (TOPO) and carboxylic acids

Abstract

Trioctylphosphine oxide (TOPO) is a hydrophobic extracting agent that is used in a number of commercially important separations of valuable solutes from aqueous streams (with examples from lanthanides, through gallium,...

Non-Ideality in Thymol + Menthol Type V Deep Eutectic Solvents

“…The viscosities of reported Type V DESs are typically in the range of 15–70 cP at 298 K, , slightly above that of conventional organic solvents but significantly lower than comparable hydrophobic ionic liquids and DESs . Importantly, solvent extraction of both apolar organic solutes and inorganic metal complexes in nonionic DESs was shown to be of comparable or superior efficiency relative to that in conventional and “unconventional” solvents such as hydrophobic ionic liquids. − , …”

Status and advances of deep eutectic solvents for metal separation and recovery

“…In general, the densities and molar volumes of DESs decrease and increase linearly, respectively, with increasing temperature. 89,90…”

“…Taking the trioctylphosphine oxide (TOPO)-based DESs as example, the TOPO: malonic acid DESs showed poorer thermal stability than the neat acid because of a self-catalyzing effect, while the TOPO: levulinic acid DESs were obviously more thermally stable than the neat levulinic acid as the mixtures prevented the decomposition by dehydration. 90…”

“…, urea) as HBD show hydrophilic characteristics due to the abundance of hydrogen bondings and coulombic interactions, leading to their completely miscible with water. 85,90 On the contrary, hydrophobic eutectics (H(D)ESs) are often composed of naturally sourced and intrinsically hydrophobic terpenes (such as menthol and thymol), trialkylphosphine oxide, or tetra alkyl-quaternary-ammonium salt as HBAs and various HBDs including long-chain carboxylic acid ( e.g. , decanoic acid), which have low water solubility.…”

Absorventes Emergentes para Separação de Gases

“…Os DES são ainda o foco de estudos em áreas como a catálise, o processamento de metais, o tratamento de biomassa, a síntese de polímeros e as operações de extração e separação, incluindo gases e compostos orgânicos voláteis [15,[24][25][26][27]. Mais recentemente, vários autores dedicaram-se à compreensão destes sistemas a nível da sua estrutura molecular [28,29], robustez, biodegradabilidade [19,30] e volatilidade [21].…”