Compatibility of PTET‐60/CA blends and separation performance of their membranes for benzene/cyclohexane mixture by pervaporation

Bai, Yunxiang; Qian, Jinwen; Zhao, Qiang; Xu, Yong; Ye, Shengrong

doi:10.1002/app.24557

Cited by 26 publications

(11 citation statements)

References 59 publications

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“…Among the most pertinent issues faced by chemical industries, separation of benzene (Bz) and cyclohexane (Cy) is considered to be one of the most thought-provoking processes. , Since cyclohexane remains as the major side product during the hydrogenation of benzene, there is a need to separate it from the mixtures for further use. Also, similarity in their kinetic diameters and boiling points restricts the use of conventional methods like fractional distillation in their separation processes.…”

Section: Chemical Separation By Mofs To Counter Industrial and Enviro...mentioning

confidence: 99%

Guest-Responsive Metal–Organic Frameworks as Scaffolds for Separation and Sensing Applications

et al. 2017

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Metal-organic frameworks (MOFs) have evolved to be next-generation utility materials because of their serviceability in a wide variety of applications. Built from organic ligands with multiple binding sites in conjunction with metal ions/clusters, these materials have found profound advantages over their other congeners in the domain of porous materials. The plethora of applications that these materials encompass has motivated material chemists to develop such novel materials, and the catalogue of MOFs is thus ever-escalating. One key feature that MOFs possess is their responsiveness toward incoming guest molecules, resulting in changes in their physical and chemical properties. Such uniqueness generally arises owing to the influenceable ligands and/or metal units that govern the formation of these ordered architectures. The suitable host-guest interactions play an important role in determining the specific responses of these materials and thus find important applications in sensing, catalysis, separation, conduction, etc. In this Account, we focus on the two most relevant applications based on the host-guest interactions that are carried out in our lab, viz., separation and sensing of small molecules. Separation of liquid-phase aromatic hydrocarbons by less energy-intensive adsorption processes has gained attention recently. Because of their tailored structures and functionalized pore surfaces, MOFs have become vital candidates in molecular separation. Prefunctionalization of MOFs by astute choice of ligands and/or metal centers results in targeted separation processes in which the molecular sieving effect plays a crucial role. In this view, separation of C and C liquid aromatic hydrocarbons, which are essential feedstock in various chemical industries, is one area of research that requires significant attention because of the gruesome separation techniques adopted in such industries. Also, from the environmental perspective, separation of oil/water mixtures demands significant attention because of the hazards of marine oil spillage. We have achieved successful separation of such by careful impregnation of hydrophobic moieties inside the nanochannels of MOFs, resulting in unprecedented efficiency in oil/water separation. Also, recognition of small molecules using optical methods (fluorescence, UV, etc.) has been extended to achieve sensing of various neutral species and anions that are important from environmental point of view. Incorporation of secondary functional groups has been utilized to sense nitroaromatic compounds (NACs) and other small molecules such as HS, NO, and aromatic phenols. We have also utilized the postfunctionalization strategy via ion exchange to fabricate MOFs for sensing of environmentally toxic and perilous anionic species such as CN and oxoanions. Our current endeavors to explore the applicability of MOFs in these two significant areas have widened the scope of research, and attempts to fabricate MOFs for real-time applications are underway.

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Section: Chemical Separation By Mofs To Counter Industrial and Enviro...mentioning

confidence: 99%

Guest-Responsive Metal–Organic Frameworks as Scaffolds for Separation and Sensing Applications

et al. 2017

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“…It is obtained exclusively by a hydrogenation of benzene. The effective cyclohexane/benzene separation is one of the most important industrial processes to be optimized since a conventional vapor fractional separation is hampered by a similarity of the boiling points of these compounds [43]. A great potential of porous MOFs for the cyclohexane/benzene separation has been already demonstrated a number of times [44][45][46].…”

Section: Benzene/cyclohexane Separationmentioning

confidence: 99%

Rational synthesis and dimensionality tuning of MOFs from preorganized heterometallic molecular complexes

et al. 2019

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“…Cyclohexane is an important intermediate product of the chemical industry. It is obtained by catalytic hydrogenation of benzene and accounts for approximately 11.4% of global benzene production, making the separation of benzene and cyclohexane mixture among the most important yet very challenging processes including complex and high energy demand techniques. − Whereas xylene aromatic mixtures have utility as antiknocking additives in gasoline and as solvents for synthetic chemistry, each of the pure isomers is individually relevant: p -xylene is used to manufacture poly(ethylene terephthalate) and poly(butylene terephthalate); m -xylene is the precursor for isophthalic acid; o -xylene is converted to phthalic anhydride, an intermediate to coatings and plasticizers . Crystallization as well as azeotropic or extractive distillation can be used to separate all three isomers, still complex and energy demand process .…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks for Highly Selective Separation of Xylene Isomers and Single-Crystal X-ray Study of Aromatic Guest–Host Inclusion Compounds

Sapianik

Dudko

Kovalenko

et al. 2021

ACS Appl. Mater. Interfaces

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Separation of hydrocarbon molecules, such as benzene/cyclohexane and o-xylene/m-xylene/p-xylene, is relevant due to their widespread application as chemical feedstock but challenging because of their similar boiling points and close molecular sizes. Physisorption separation could offer an energy-efficient solution to this problem, but the design and synthesis of sorbents that exhibit high selectivity for one of the hydrocarbons remain a largely unmet challenge. Herein, we report a new heterometallic MOF with a unique tortuous shape of channels decorated with aromatic sorption sites [Li2Zn2(bpy)(ndc)3] (NIIC-30(Ph), bpy = 4,4′-bipyridine, ndc2– = naphthalene-1,4-dicarboxylate) and study of its benzene/cyclohexane and xylene vapor and liquid separation. For an equimolar benzene/cyclohexane mixture, it is possible to achieve a 10-fold excess of benzene in the adsorbed phase. In the case of xylenes, microporous framework NIIC-30(Ph) demonstrates outstanding selective sorption properties and becomes a new benchmark for m-/o-xylene separation. In addition, NIIC-30(Ph) is stable enough to carry out at least three separation cycles of benzene/cyclohexane mixtures or ternary o-xylene/m-xylene/p-xylene mixtures both in the liquid and in the vapor phase. Insights into the performance of NIIC-30(Ph) are gained from X-ray structural studies of each aromatic guest inclusion compound.

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Compatibility of PTET‐60/CA blends and separation performance of their membranes for benzene/cyclohexane mixture by pervaporation

Cited by 26 publications

References 59 publications

Guest-Responsive Metal–Organic Frameworks as Scaffolds for Separation and Sensing Applications

Guest-Responsive Metal–Organic Frameworks as Scaffolds for Separation and Sensing Applications

Rational synthesis and dimensionality tuning of MOFs from preorganized heterometallic molecular complexes

Metal–Organic Frameworks for Highly Selective Separation of Xylene Isomers and Single-Crystal X-ray Study of Aromatic Guest–Host Inclusion Compounds

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