Development of stable organic solvent nanofiltration membranes for membrane enhanced dynamic kinetic resolution

Roengpithya, Chayaporn; Patterson, Darrell Alec; Taylor, Paul C.; Livingston, Andrew G.

doi:10.1016/j.desal.2006.03.045

Cited by 19 publications

(6 citation statements)

References 2 publications

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“…This may range from swelling to complete deterioration of the membrane structure. STARMEM membranes are well-known for their good performance in a solvent-separation process and are widely used by researchers. ,,− The manufacturer’s datasheet claims that these membranes are well designed for applications related to different solvent classes, specifically for treatment of toluene . In a first step, to check the validity of our experimental data, the permeabilities of untreated membranes were measured in toluene.…”

Section: Resultsmentioning

confidence: 99%

Performance of Solvent-Pretreated Polyimide Nanofiltration Membranes for Separation of Dissolved Dyes from Toluene

Darvishmanesh

Degrève

Bruggen

2010

Ind. Eng. Chem. Res.

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The major problem reported for commercially available membranes is their limited chemical stability in organic solvents. This article reports the influence of organic solvents with different polarity (methanol, acetone, acetic acid, toluene, and n-hexane) on the filtration performance of STARMEM membranes. These membranes are specified to be compatible with the solvents used. The pure toluene flux of these membranes and the rejection of azo dyes (Sudan Black and Rhodanile Blue) were measured before and after a week of exposure to one of the above-mentioned solvents. The results show that the structure of the membrane changed after pretreatment with polar solvents (methanol, acetone, acetic acid) and that the membrane performance shifts toward lower rejections with higher solvent flux. Nonpolar solvents do not change the polyimide membrane performances significantly. Contact angle measurements on new and solvent-treated membranes show that organic solvents change the hydrophobicity of polymeric membrane surfaces, leading to different toluene permeabilities before and after solvent treatment. Swelling measurements confirm the theory that a reorganization of the membrane material takes place, which leads to differences in porosity and changes in rejection. The study also shows that pretreatment of polyimide membranes with polar solvents increases the recovery of the membrane system when the solute size is large enough.

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Section: Resultsmentioning

confidence: 99%

Performance of Solvent-Pretreated Polyimide Nanofiltration Membranes for Separation of Dissolved Dyes from Toluene

Darvishmanesh

Degrève

Bruggen

2010

Ind. Eng. Chem. Res.

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“…Another example is the use of Starmem 122 PI membrane in OSN-assisted chiral resolution where only one of the enantiomers pass through the membrane and the other enantiomer−catalyst complex is retained by the membrane. 412 Furthermore, racemic phenethyl alcohol was resolved using OSN via inclusion complexation where the resolving agent formed complexes with the (S)enantiomer, which precipitated, while the (R)-enantiomer permeates through the membrane during nanofiltration (cf., Figure 40). 413 The final step of the process is decomplexation via solvent exchange allowing the liberation of the free (S)enantiomer, which can now also permeate through the membrane.…”

Section: Purificationmentioning

confidence: 99%

“…The investigation revealed that chiral interactions happen during the crystallization and not in solution. Another example is the use of Starmem 122 PI membrane in OSN-assisted chiral resolution where only one of the enantiomers pass through the membrane and the other enantiomer–catalyst complex is retained by the membrane . Furthermore, racemic phenethyl alcohol was resolved using OSN via inclusion complexation where the resolving agent formed complexes with the ( S )-enantiomer, which precipitated, while the ( R )-enantiomer permeates through the membrane during nanofiltration (cf., Figure ) .…”

Section: Membrane Applications In Organic Solventsmentioning

confidence: 99%

Molecular Separation with Organic Solvent Nanofiltration: A Critical Review

et al. 2014

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“…Dimethyl methylsuccinate was separated from methanol, 17 while homogeneous catalysts 15,[181][182][183][184][185] and PTCs 15,165,186 were recycled. The membranes were also combined with chiral separations [187][188][189][190] and ionic liquid-mediated reactions. 191 Starmem membranes also proved useful in petrochemistry for solvent recovery in lube oil dewaxing 5,192 and aromatics enrichment, 5 in pharmaceutical manufacturing for solvent exchange 15,193 and microfluidic purification, 194 and could be used in membrane bioreactors (MBRs) for biotransformations.…”

Section: Commercial Srnf-membranesmentioning

confidence: 99%

“…The concept worked, but the Starmem TM 122 membrane degraded under the reported conditions due to limited base stability. 187 5.4 Petrochemical applications 5.4.1 Introduction. The refining industry is both energy-and separations-intensive, and is often accompanied by a large exhaust of organic solvents, suggesting that large-scale membrane systems can provide significant benefits.…”

Section: Transition Metal Complexesmentioning

confidence: 99%

Solvent resistant nanofiltration: separating on a molecular level

2008

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Over the past decade, solvent resistant nanofiltration (SRNF) has gained a lot of attention, as it is a promising energy- and waste-efficient unit process to separate mixtures down to a molecular level. This critical review focuses on all aspects related to this new burgeoning technology, occasionally also including literature obtained on aqueous applications or related membrane processes, if of relevance to understand SRNF better. An overview of the different membrane materials and the methods to turn them into suitable SRNF-membranes will be given first. The membrane transport mechanism and its modelling will receive attention in order to understand the process and the reported membrane performances better. Finally, all SRNF-applications reported so far - in food chemistry, petrochemistry, catalysis, pharmaceutical manufacturing - will be reviewed exhaustively (324 references).

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Development of stable organic solvent nanofiltration membranes for membrane enhanced dynamic kinetic resolution

Cited by 19 publications

References 2 publications

Performance of Solvent-Pretreated Polyimide Nanofiltration Membranes for Separation of Dissolved Dyes from Toluene

Performance of Solvent-Pretreated Polyimide Nanofiltration Membranes for Separation of Dissolved Dyes from Toluene

Molecular Separation with Organic Solvent Nanofiltration: A Critical Review

Solvent resistant nanofiltration: separating on a molecular level

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