Specialty polymeric membranes. XIV. Pervaporation of benzene/cyclohexane mixtures through modified polyamide membranes

Abstract

Methyl methacrylate, ethyl methacrylate, propyl methacrylate, and styrene were graft-polymerized onto the amorphous polyamide poly(hexamethylene terephthalamide/isophthalamide) (SELAR). Membranes were prepared from the modified SELAR and unmodified SELAR. The membranes were permeated benzene in preference to cyclohexane from benzene/cyclohexane mixtures by pervaporation.

Performance, morphology and tensile characterization of activated carbon composite membranes for the synthesis of enzyme membrane reactors

“…Particularly, to achieve high permeability and selectivity values for membrane separation processes. Examples include zeolite/polymer mixtures [2], clay dispersed in polymeric matrix [3] or carbon fillers in composite polymeric membranes [4]. In this case, fine particles of commercial activated carbon were used with the polysulfone as the polymeric matrix of the membrane.…”

Significant increase of permeation flux and selectivity of poly(vinyl alcohol) membranes by incorporation of crystalline flake graphite

“…Hence, increasing benzene solubility in the membrane is essential to obtain high permselectivity toward benzene. To this end, introduction of functional groups [4,5] or fillers [6][7][8], which show high affinity towards benzene, is an effective method to obtain benzene permselective membranes.…”

Modeling of Organic Mixtures Separation in Dense Membranes Using Finite Element Method (FEM).

“…Pervaporation is a membranebased separation process that has gained much interest by the chemical industry as an effective and energy-efficient technology to carry out separations that are difficult to achieve by conventional processes such as distillation, extraction or adsorption. Pervaporation is more favorable for azeotropic and close-boiling liquid mixture separation; organic solvent dehydration and recovery of high added-value dilute species from water [1][2][3][4][5][6][7][8][9][10] . The transport of species through the PV membranes involves three steps in series: (A) selective sorption into the membrane, (B) diffusion through the membrane, and (C) desorption into the vapor phase.…”

“…This is also categorized as a major branch of organic/organic mixtures separation. This field was first investigated 25 years ago, in the frame of a European project 5,6 . The application of this separation is in production of aromatic-lean motor fuels that are recommended in developed countries 8,[15][16][17][18][19][20] .…”