Recycling and Separation of Homogeneous Catalyst from Aqueous Multicomponent Mixture by Organic Solvent Nanofiltration

Abstract

Organic solvent nanofiltration (OSN) has evolved to an established recycling method for homogeneous catalysts. However, commercial availability has not circumvented the need for classification and the scoping of possible applications for specific solvent mixtures. Therefore, Evonik’s DuraMem® 300 was assessed for the recycling of magnesium triflate at two transmembrane pressures from a mixture of ethanol, ethyl acetate and water. Catalyst retention up to 98% and permeability of up to 4.44·10−1∙L∙bar−1∙m−2∙h−1 were possible when less than 25% ethyl acetate was in the mixture. The retention of some of the components in the ternary mixture was observed while others were enriched, making the membrane also suitable for fractioning thereof.

Integrated Life Cycle and Techno-Economic Assessment of Micellar Solvent Systems in Bulk Fine Chemical Production

“…In the base case, the emissions of greenhouse gases are assumed to be free of cost, whereas the resulting environmental impacts are included in the assessment. The precious catalyst metal contained in solvent waste streams is assumed to be recyclable at a downstream stage with a rate of 98%, 40 which is included as a credit in both LCA and TEA. Further specific methodological aspects regarding LCA and TEA will be presented in the following sections.…”

Comparative Analysis of Donnan Steric Partitioning Pore Model and Dielectric Exclusion Applied to the Fractionation of Aqueous Saline Solutions through Nanofiltration

“…The separation, concentration, and production of hormones and antibiotics [30][31][32] The capture of fibrinogen and coagulation compounds [33][34][35] The production of organic acids [36][37][38] Catalyst recovery [39][40][41] Protein separation [42][43][44] Water treatment Arsenic removal from groundwater [17,45,46] Figure 1. Scheme of pressure-driven membrane processes and their respective rejection ranges.…”

“…The separation, concentration, and production of hormones and antibiotics [30][31][32] The capture of fibrinogen and coagulation compounds [33][34][35] The production of organic acids [36][37][38] Catalyst recovery [39][40][41] Protein separation [42][43][44] Water treatment Arsenic removal from groundwater [17,45,46] The removal of pesticides from groundwater [47][48][49] Wastewater treatment [19,20,50 A nanofiltration membrane is defined as a microporous medium with characteristics that fall between those of UF and RO. Structurally, NF membranes are asymmetric, featuring an ultra-thin selective layer [57][58][59].…”

Recycling of homogenous catalyst using organic solvent filtration and electrochemical separation

“…Two years later, Schnoor et al omitted Cy as the third solvent and used H2O instead. In this case, water makes the miscibility between EtOH and EtOAc complete [14]. The permeate flux and retention measurement is repeated using a mixture with a different composition.…”