Copolymer resin. VII. 8‐hydroxyquinoline‐5‐sulfonic acid–thiourea–formaldehyde copolymer resins and their ion‐exchange properties

Abstract

8-Hydroxyquinoline-5-sulfonic acid-thiourea-formaldehyde copolymer resins were synthesized through the condensation of 8-hydroxyquinoline-5-sulfonic acid and thiourea with formaldehyde in the presence of hydrochloric acid as a catalyst and with various molar ratios of the reacting monomers. The resulting copolymers were characterized with UV-visible, IR and 1H-NMR spectral data, employed to determine the reactivity of monomers. The average molecular weights of these resins were determined with vapor pressure osmometry and conductometric titration in a nonaqueous medium. The chelation ion-exchange properties were also studied with the batch equilibrium method. The resins were proved to be selective chelating ion-exchange copolymers for certain metals. The chelation ion-exchange properties of these copolymers were studied for Cu 2þ , Ni 2þ , Co 2þ , Pb 2þ , and Fe 3þ ions. The study was carried out over a wide pH range and in media of various ionic strengths. The copolymers showed a higher selectivity for Fe 3þ ions than for Cu 2þ , Ni 2þ , Co 2þ , and Pb 2þ ions.

Synthetic functionalized terpolymeric resin for the removal of hazardous metal ions: synthesis, characterization and batch separation analysis

“…[32,34,35] Finally, the reported resin is found to be a very effective hazardous metal ion-exchanger than the earlier reported resins. [5,12,18,35] CONCLUSION A novel chelating resin was synthesized for the recovery of harmful metal ions. The synthesized resin was characterized by various spectral techniques, and its morphological features were analyzed.…”

“…The resins were suited to be better ion-exchangers for several dangerous metals. [12] Our research group has reported chelating ion-exchangers to remove hazardous creating metal ions from aqueous solution by batch equilibrium method using various synthesized terpolymer resins. The results confirmed that the synthetic resin had excellent capacity to remove such selected metal ions.…”

Analytical applications of newly synthesized copolymer resin derived from p‐aminophenol, dithiooxamide, and formaldehyde

“…Various hydroxyl benzoic acidformaldehyde and 4-hydroxyacetophenone-biureformaldehyde copolymers have been reported and found to be useful as ion-exchangers. [10][11][12] Copolymers of 8-hydroxyquinoline-formaldehyderesorcinol/catechol were reported by Shah et al 13,14 and chromatographic column separation for various metal ions such as Cu 2þ , Ni 2þ , Zn 2þ , Pb 2þ , and Cd 2þ have carried out using the quinoline base resins. Mubarak and coworkers 15 have studied the chelation behavior of the phenolic-formaldehyde polymers, poly(2,4-dihydroxybenzoic acid-3,5-dimethylene), poly(2-hydroxybenzoic acid-3,5-dimethylene) and poly(3-hydroxybenzoic acid-4,6-dimethylene) towards the trivalent lanthanide metal ions such as La 3þ , Nd 3þ , Sm 3þ , Gd 3þ , and Tb 3þ by a static batch equilibrium technique at 25 C as a function of contact time, pH, and concentration.…”

Adsorption of Cadmium(II) Ion from Aqueous Solutions onto Synthetic Terpolymer: Isotherm and Kinetic Study

“…Therefore, attempt has been made to synthesize terpolymer and to evaluate the ion-exchange properties. Various combinations of 8-hydroxyquinoline-5-sulfonic acid-thiourea-formaldehyde, ortho-nitro phenol-thiourea-para-formaldehyde and anthranilic acid-thiourea-para-formaldehyde have been synthesized by condensation polymerization and reported for their chelation ion-exchange properties toward selective metal ions [8][9][10] . Ion exchange technique can be used to remove traces of ionic impurities from water and give ultra pure quality in a simple efficient and techno-economically viable manner.…”