Interfacial Catalysis in Biphasic Carboxylic Acid Esterification with a Nickel-Based Metallosurfactant was written by Toth, Andreas;Schnedl, Silke;Painer, Daniela;Siebenhofer, Matthaeus;Lux, Susanne. And the article was included in ACS Sustainable Chemistry & Engineering in 2019.Related Products of 112-14-1 The following contents are mentioned in the article:
A metallosurfactant catalyst was developed to address the requirements for the utilization of low-mol.-weight carboxylic acids from dilute effluents. The catalyst Ni(DBSA)2 combines transition-metal catalysis of nickel ions and surfactant catalysis of 4-dodecylbenzenesulfonic acid (4-DBSA). Requirements for the metallosurfactant catalyst are low water solubility, high catalytic activity in biphasic esterification, and self-assembling properties at the interface. Ni(DBSA)2 was tested for applicability in the interfacial catalysis of esterification of dilute acetic acid with the solvent 1-octanol and resulted in an octyl acetate yield of 31.3%. Under identical reaction conditions, Ni(DBSA)2 performed better than sulfuric acid with a yield of 1.7%. The limited catalytic performance of sulfuric acid is caused by the presence of sulfuric acid mainly in the aqueous phase. In contrast, Ni(DBSA)2 is dissolved in the solvent and assembles at the aqueous/solvent interface where the reaction takes place. Addnl., the metallosurfactant lowers the interfacial tension between 1-octanol and deionized water by up to 75%, thus enhancing mass transfer. Compared to catalysis with 4-DBSA in emulsion, the catalytic performance of Ni(DBSA)2 dropped by 62%, but this drawback is compensated by the complete suppression of emulsification. With Ni(DBSA)2, the development of a catalyst was achieved, which self-enhances its catalytic performance in the interfacial catalysis through increased mass transfer area due to its surfactant properties. A nickel-based metallosurfactant is used to enhance the valorization of low-mol.-weight carboxylic acids from aqueous biobased effluents. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Related Products of 112-14-1).
Octyl acetate (cas: 112-14-1) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Related Products of 112-14-1
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics