Separation of phenol–water mixture by membrane pervaporation using polyimide membranes

Pradhan, Narayan; Sarkar, Chandra Sekhar; Niyogi, Sobhan; Adhikari, Basudam

doi:10.1002/app.10055

Cited by 17 publications

(22 citation statements)

References 19 publications

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“…Polyimides are being widely investigated as gas permeation [1][2][3] and pervaporation membrane materials 4 and as key materials in the electronics industry. 5 However, most of the polyimides have strong interchain attractive forces, dense molecular packing, and chain rigidity resulting in difficulty for processing and have poor solubility in organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and gas permeability of aromatic polyimides containing pendant phenoxy group

Kothawade

Kulkarni

Kharul

et al. 2008

J of Applied Polymer Sci

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A diamine containing a pendant phenoxy group, 1-phenoxy-2,4-diaminobenzene, was synthesized and condensed with different aromatic dianhydrides [4,4 0 -oxydiphthalic dianhydride, 4,4 0 -(hexafluoroisopropylidene)diphthalic anhydride, 3,3 0 ,4,4 0 -benzophenone tetracarboxylic dianhydride, 3,3 0 ,4,4 0 -biphenyltetracorboxylic dianhydride, and pyromellitic dianhydride] by one-step synthesis at a high temperature in m-cresol to obtain polyimides in high yields. Most of the polyimides exhibited good solvent solubility and could be readily dissolved in chloroform, sym-tetrachloroethane, N,N-dimethylformamide, N,N-dimethylacetamide, and nitrobenzene. Their inherent viscosities were in the range of 0.33-1.16 dL/g. Wide-angle X-ray spectra revealed that these polymers were amorphous in nature. All these polyimides were thermally stable, having initial decomposition temperatures above 5008C and glass-transition temperatures in the range of 248-2818C. The gas permeability of 4,4 0 -oxydiphthalic dianhydride and 4,4 0 -(hexafluoroisopropylidene)diphthalic anhydride based polyimides was investigated with pure gases: He, H 2 , O 2 , Ar, N 2 , CH 4 , and CO 2 . A polyimide containing a À ÀC(CF 3 ) 2 À À linkage showed a good combination of permeability and selectivity.

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and gas permeability of aromatic polyimides containing pendant phenoxy group

Kothawade

Kulkarni

Kharul

et al. 2008

J of Applied Polymer Sci

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show abstract

“…On the other hand, the recovery methods include liquid-liquid extraction [10][11][12], adsorption and electro-adsorption with activated charcoal [13,14], ionic exchange with resins [15], and membrane processes, such as pervaporation [16] and extraction with membrane [17], supported liquid membrane [18], and liquid membrane in emulsion [19].…”

Section: Introductionmentioning

confidence: 99%

Batch Liquid‐Liquid Extraction of Phenol from Aqueous Solutions

et al. 2009

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The aim of this work is the study of batch liquid-liquid extraction of phenol from aqueous solutions in a bench-scale well-mixed reactor. The influence of the ratio of phase volumes, temperature, and rotational speed on phenol removal (0.72-1.1 % w/w) was investigated using methyl isobutyl ketone as an extracting solvent. For this purpose, the ratio of phase volumes were set at 0.1 and 0.2, the temperature at 10, 20, and 30°C, and the rotational speed at 300, 400, and 500 rpm. A physical model based on the material balance of the phases as well as the equation of mass flux between the phases allowed the estimation of the overall coefficient of mass transfer coupled with the superficial area. Moreover, it proved to fit, satisfactorily well, the experimental data of residual phenol concentration in the organic phase versus time under all the conditions investigated.

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“…[1][2][3][4][5] Despite the successful commercialization of poly(vinyl alcohol) (PVA)-based membranes, 6,7 researchers have attempted to develop other polymer membranes having good permeation flux and separation selectivity. These include blends, 8,9 composites, 10,11 charged membranes, 12,13 polyion complex membranes, 14 copolymer, 15 and grafted copolymer 16 membranes, etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polyacrylamidegrafted sodium alginate membranes for pervaporation separation of water + isopropanol mixtures

Toti¹,

Aminabhavi²

2004

J of Applied Polymer Sci

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Polyacrylamide-grafted-sodium alginate copolymers were prepared by persulfate-induced radical polymerization by using polymer-to-monomer ratios of 2 : 1 and 1 : 1. Polymers were characterized by Fourier transform infrared spectroscopy, differential thermal analysis, and viscosity. Membranes were prepared from the polymers, crosslinked with glutaraldehyde, and used in the pervaporation separation of water ϩ isopropanol mixtures at 30°C. Equilibrium swelling experiments were performed for mixtures containing 10 to 80 mass % of water in the feed. Both the grafted copolymer membranes were ruptured while separating 10 mass % of water in the feed mixture. However, beyond 20 mass % of water in the feed mixture, flux increased with increasing grafting ratio, while selectivity decreased. Pervaporation separation experiments were carried out at 30, 40, and 50°C for 20 mass % of water in the feed mixture. By increasing the temperature, flux increased, whereas selectivity decreased. Arrhenius activation parameters for pervaporation and diffusion decreased with increasing grafting ratio of the membranes.

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Separation of phenol–water mixture by membrane pervaporation using polyimide membranes

Cited by 17 publications

References 19 publications

Synthesis, characterization, and gas permeability of aromatic polyimides containing pendant phenoxy group

Synthesis, characterization, and gas permeability of aromatic polyimides containing pendant phenoxy group

Batch Liquid‐Liquid Extraction of Phenol from Aqueous Solutions

Synthesis and characterization of polyacrylamidegrafted sodium alginate membranes for pervaporation separation of water + isopropanol mixtures

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