Adsorption of organic acids on weakly basic ion exchanger: Equilibria for binary systems

Exchange characteristics of monocarboxylic acids and monosulfonic acids onto anion-exchange resins

“…(4) with a selectivity coefficient was compared with the experimental isotherm by Eq. (10). The isotherms of benzoate ion and propionate ion ion-exchange onto the 16 kinds of resin listed in Tables 1 and 2 were investigated, and the parameters k and n and the selectivity coefficients S A Cl were obtained, as shown in Table 4, where the parameter k, which became less than 0.01 was denoted as <0.01, and Q AH was neglected in calculation because of very few.…”

“…However, there are few fundamental researches on adsorption of organic compounds by anionexchange resins [9][10][11][12][13]; the information on the adsorption characteristics of organic acids onto anion-exchange resins is not sufficient.…”

Conversion of scallop viscera wastes to valuable compounds using sub-critical water

“…The separating of amino and organic acids in single or binary systems has been already reported by one of the authors using adsorption/ion exchange technology. [30][31][32][33][34] However, separation of multicomponent organic compounds will be reported in the subsequent stages of this research.…”

Conversion of Calcium Citrate to Citric Acid with Compressed CO2

“…This technique can be employed at a large scale in the recovery and purification of biomolecules and has been used for citric acid recovery from fermentation broth by ion-exchange resins ( Scheme 1 , path c). Several resins are employed in this process such as macroporous resins Amberlite XAD-4 and XAD-16, 21 commercial weakly basic resin Diaion WA30, 22 Amberlite IRA-67, 23 and tailor-made tertiary PVP resin. 24 Although high selectivity and efficiency were achieved by the adsorption using ion-exchange resins, the resins need to be regenerated and replaced, producing a lot of solid and liquid waste.…”