Ion Exchange Properties of Resins Derived from <i>p</i>‐Hydroxybenzaldehyde, Resorcinol and Formaldehyde

Hiwase, Vinay V.; Kalambe, A. B.; Khedkar, K. M.; Deosarkar, S. D.

doi:10.1155/2010/830484

Cited by 9 publications

(5 citation statements)

References 6 publications

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“…The large numbers of breaks were observed in the plot. The average degree of polymerisation and hence the number average molecular weight of terpolymer have been determined using the following relations [20][21][22][23][24][25] .…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Chacterization, and Thermal Study of Terpolymeric Resin Derived from m‐cresol, Hexamine and Formaldehyde

Khedkar

Hiwase

Kalambe

et al. 2012

Journal of Chemistry

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Terpolymeric resin was prepared from m-cresol (0.1M), hexamine (0.05M) and formaldehyde (0.2M) by acid catalyzed polycondensation method using 1M HCl in temperature range of 122-130°C.The resin was abbreviated as m-CHF-I. The molecular weight of terpolymer was determined by non-aqueous conductometric titration technique. The structure of resin was determined by its elemental analysis, UV-VIS, IR, and NMR data. The thermokinetic parameters were determined using Freeman-Carroll (FC) and Sharp Wentworth (SW) method in temperature range (410-485°C).The values of activation energies (Ea), entropy (∆S), and free energies (∆G) were in good agreement . The order of degradation reaction determined by FC method was confirmed by SW method.

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Section: Resultsmentioning

confidence: 99%

Synthesis, Chacterization, and Thermal Study of Terpolymeric Resin Derived from m‐cresol, Hexamine and Formaldehyde

Khedkar

Hiwase

Kalambe

et al. 2012

Journal of Chemistry

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“…The ion-exchange studies of p-NP-TETA-F terpolymer resins were determined by batch equilibrium method (31,32) and have been experimentally performed as follows.…”

Section: Ion Exchange Studiesmentioning

confidence: 99%

“…Ion exchange properties of terpolymers derived from 2,4-dihydroxybenzoic acid-urea-formaldehyde (16), o-nitrophenol and thiourea with paraformaldehyde (17) Further dried polymeric sample extracted with diethyl ether to remove the excess dimmers formed during the reaction. Finally the copolymer was passed through 300-mesh size sieve and kept in a vacuum over silica gel (31,32). Similar procedure has been applied for the synthesis of …”

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confidence: 99%

Sorption Studies of Terpolymers Based onp-Nitrophenol, Triethylenetetramine, and Formaldehyde

Kalbende

Zade

2015

Separation Science and Technology

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Terpolymer resins have been synthesized by condensation of p-nitrophenol, triethylenetetramine and formaldehyde in presence of 2M NaOH as a catalyst with different molar proportions of monomers. Newly synthesized terpolymers were proved to be selective chelation ion-exchangers for metal ions like Fe 3+ , Cu 2+ , Ni 2+ , Co 2+ , Zn 2+ , Cd 2+ , Hg 2+ and Pb 2+ . A batch equilibrium study was carried out over a wide pH range, shaking time and in media of various ionic strengths of different electrolytes and shows higher selectivity for Hg 2+ , Cd 2+ and Pb 2+ . Distribution ratios of metal ions were found to be increased by increasing pH of solutions; hence the resins can be used to recover certain metals from waste solutions and removal of iron from boiler water.

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“…The metal content was determined by a spectrophotometer. The amount of metal exchanged was determined from the difference between reading in blank and actual experiments [9][10][11] . The amounts of metal ion in mg per g of resin were calculated in the presence of NaCl, NaNO 3 , NaClO 4 and Na 2 SO 4 electrolyte for metal ions Sb 3+ , Bi 3+ , Zn 2+ and Mg 2+ .…”

Section: Procedures For Determination Of the Effect Of Electrolyte On mentioning

confidence: 99%

Synthesis, Characterization and Ion-Exchange Properties of Terpolymer Resin-II Derived from p-Hydroxybenzaldehyde, Thiourea and Ethylene Glycol

Gupta¹,

Hiwase²,

Kalambe³

2013

Chem Sci Trans

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Ion-exchange resin (HBTE-II) was synthesized by polycondensation in the presence of polyphosphoric acid as a catalyst using monomers p-hydroxybenzaldehyde (0.2 M), thiourea (0.1 M) and ethylene glycol (0.4 M) at 120 0 C. The terpolymer resin was characterized by elemental analysis, the number average molecular weight, UV-Visible, IR and 1 H NMR spectrum. Chelating ion-exchange properties of this copolymer were studied for Bi 3+ , Sb 3+ , Zn 2+ and Mg 2+ ions. A batch equilibrium method was employed in the study of the selectivity of metal ion uptake involving the measurements of the distribution of a given metal ion between the polymer sample and a solution containing the metal ion. The study was carried out over a wide pH range and in media of various ionic strengths. The metal ions were estimated spectrophotometrically. The HBTE-II terpolymer resin was found to be selective chelating ion-exchange resin for Sb 3+ , Bi 3+ and Zn 2+.

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Ion Exchange Properties of Resins Derived from p‐Hydroxybenzaldehyde, Resorcinol and Formaldehyde

Cited by 9 publications

References 6 publications

Synthesis, Chacterization, and Thermal Study of Terpolymeric Resin Derived from m‐cresol, Hexamine and Formaldehyde

Synthesis, Chacterization, and Thermal Study of Terpolymeric Resin Derived from m‐cresol, Hexamine and Formaldehyde

Sorption Studies of Terpolymers Based onp-Nitrophenol, Triethylenetetramine, and Formaldehyde

Synthesis, Characterization and Ion-Exchange Properties of Terpolymer Resin-II Derived from p-Hydroxybenzaldehyde, Thiourea and Ethylene Glycol

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