Separation of benzene–cyclohexane mixtures by filled blend membranes of carboxymethyl cellulose and sodium alginate

Kuila, S.B.; Ray, S. K.

doi:10.1016/j.seppur.2013.12.017

Cited by 41 publications

(22 citation statements)

References 37 publications

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“…It should be pointed out that the separation of benzene/cyclohexane is quite important in chemical industry, but much more challenged due to their close boiling points (benzene: 80.1°C; cyclohexane: 80.7°C). Interestingly, this MOP‐SO 3 Na n H m /Boltorn W3000 hybrid membrane represented a good performance for the enrichment of benzene from 50 wt % benzene/cyclohexane mixture by the pervaporation, being comparable to other reported membranes (see Table ) . In addition, the stability tests of the MOP‐SO 3 Na n H m hybrid membrane in the separation of 50 wt % toluene/ n ‐heptane and 50 wt % benzene/cyclohexane mixtures were carried out, respectively.…”

Section: Resultssupporting

confidence: 59%

Functionalized metal‐organic polyhedra hybrid membranes for aromatic hydrocarbons recovery

Zhao

Wang

et al. 2016

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com)Pervaporation membranes are potentially useful in the separation of aromatic/aliphatic mixtures. Wherein, the membrane material plays a key role. Herein, a series of functionalized metal-organic polyhedra (MOPs)/hyperbranched polymer hybrid membranes are molecularly designed and fabricated for the recovery of aromatic hydrocarbons. The isostructural MOP molecules with different functional groups are uniform in shape/size and soluble in solvents, which enable them to disperse well and be compatible in/with the polymer. Pervaporation results demonstrated significant improvements of these membranes in separation performances. Particularly, the membrane with MOP-SO 3 Na n H m showed the separation factor of 8.03 and the permeation flux of 528 g/m 2 h for the recovery of toluene from its 50 wt % n-heptane mixture, and those values are 8.4 and 540 g/m 2 h for benzene/cyclohexane mixture. We propose that the selectivity of these membranes is affected primarily by the polarity of functional groups in MOPs, which were further explained by the adsorption experiments and molecular simulations.

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Section: Resultssupporting

confidence: 59%

Functionalized metal‐organic polyhedra hybrid membranes for aromatic hydrocarbons recovery

Zhao

Wang

et al. 2016

AIChE Journal

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“…[1] They are widely used not only in the production of nylon, paints, varnishes,a nd pharmaceutical intermediates but also as excellent solvents of resins,b utyl rubber,a nd so on. [3] Theu nreacted Ben or Tol, which is present in the reactorse ffluent stream, must be removed to obtain CH or MCH of high purity.H owever,t he separation of cyclic aliphatics from the corresponding aromatics has been classified into one of the most difficult chemical separations owing to their similar physical properties. [3] Theu nreacted Ben or Tol, which is present in the reactorse ffluent stream, must be removed to obtain CH or MCH of high purity.H owever,t he separation of cyclic aliphatics from the corresponding aromatics has been classified into one of the most difficult chemical separations owing to their similar physical properties.…”

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confidence: 99%

“…[2] In the chemical industry,C Ha nd MCH are mainly produced by hydrogenation of benzene (Ben) and toluene (Tol), respectively. [3] Theu nreacted Ben or Tol, which is present in the reactorse ffluent stream, must be removed to obtain CH or MCH of high purity.H owever,t he separation of cyclic aliphatics from the corresponding aromatics has been classified into one of the most difficult chemical separations owing to their similar physical properties. [4] Thel ittle difference in boiling points (Ben:8 0 8 8C, CH:8 1 8 8C; Tol: 110 8 8C, MCH: 101 8 8C) makes them practically impossible to be separated by conventional distillation.…”

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confidence: 99%

Separation of Aromatics/Cyclic Aliphatics by Nonporous Adaptive Pillararene Crystals

et al. 2018

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The separation of cyclic aliphatics of high purity, which are produced from hydrogenation of the corresponding aromatics, is highly desired in the chemical industry. An energy-efficient and environmentally friendly adsorptive separation method using nonporous adaptive crystals of perethylated pillar[5]arene (EtP5) and pillar[6]arene (EtP6) is described. Adaptive EtP5 crystals separate toluene from methylcyclohexane with 98.8 % purity, while adaptive EtP6 crystals separate methylcyclohexane from toluene with 99.2 % purity. The selectivities come from the stability of new EtP5 and EtP6 crystal structures upon capture of toluene and methylcyclohexane, respectively. The reversible transformations between nonporous guest-free EtP5 or EtP6 structures and guest-loaded structures make them highly recyclable.

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“…Furfural is commonly used as an entrainer to overcome this azeotrope and to increase the driving force for separation of benzene from cyclohexane. In the hybrid scheme, a membrane made of carboxymethyl cellulose and sodium alginate [42] is used to purify the distillate product from the distillation column from 88.8% (mole) to 99.5% (mole) cyclohexane. The operating conditions and design details of the membrane unit are given in Table 3.…”

Section: Hybrid Separation: New Application Examplementioning

confidence: 99%

Energy and CO2 management for chemical and related industries: issues, opportunities and challenges

Vooradi

Anne²,

Tula

et al. 2019

BMC Chem Eng

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This paper gives a brief review of energy and CO 2 emissions related topics resulting from the chemical and related industries. The main issues, challenges and opportunities are highlighted together with perspectives of process alternatives for more efficient energy consumption and CO 2 emission management. Analysis of the data indicate that not all available energy resources are being utilized efficiently, while the energy resources causing the largest emissions of CO 2 are being used in the largest amounts. Also, the chemical and related industries are among the largest consumers of energy, indicating that solutions for reduction of energy consumption and CO 2 emissions in these industries need to be investigated. Information on promising alternatives for reduction of energy consumption and CO 2 emissions are collected and a selection of them are evaluated. Also, two specific case studies involving energy intensive separation operations replaced by recently developed technologies that may achieve significant reductions in energy consumption, CO 2 emissions and total annualized costs are presented. Through these examples issues of energy need versus CO 2 neutral design, sustainable conversion, retrofit design, and process intensification for chemical and related industries are highlighted.

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Separation of benzene–cyclohexane mixtures by filled blend membranes of carboxymethyl cellulose and sodium alginate

Cited by 41 publications

References 37 publications

Functionalized metal‐organic polyhedra hybrid membranes for aromatic hydrocarbons recovery

Functionalized metal‐organic polyhedra hybrid membranes for aromatic hydrocarbons recovery

Separation of Aromatics/Cyclic Aliphatics by Nonporous Adaptive Pillararene Crystals

Energy and CO2 management for chemical and related industries: issues, opportunities and challenges

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