Pervaporation

The separation of alcohol–water mixtures by pervaporation has been preferentially carried out through hydrophobic membranes because it is more practical to permeate alcohol through the membrane. Nevertheless, most polymeric membranes are water permselective as the molecular size of water is smaller

In this work a laboratory pervaporation equipment using three different flat organophilic membranes: PERVAP1060 (Sulzer), POMS and PEBA (GKSS), for pure compounds (TCE, Ethylbenzene and MTBE) has been assembled to prove micropollutant separation. Previous membrane adsorption tests have been performe

In order to stabilize the production of highly concentrated ethanol, a coupled fermentation/pervaporation process using ethanol permselective silicalite membranes coated with silicone rubber was studied. In case of the silicalite membrane without coating, the membrane flux and the ethanol concentrat

The pervaporation performances of a series of functionalized syndiotactic poly(styrene-co-4-methylstyrene) (SPSM) membranes for various alcohol mixtures were investigated. The effect of functionalization on the thermal properties and polymer structure of the SPSM membranes were also investigated. Th

Pervaporation (PV) of benzene (Bz) and cyclohexane (Cx) was performed using Nafion-117 membranes containing silver and sodium ions. The effects of membrane conditioning methods and operating conditions on the permeability and selectivity of PV processing were studied. Membranes treated with NaOH, io

The technical and economical feasibility of inorganic membranes was evaluated for the dewatering of organic solvents by pervaporation. A mapping of the process industry was carried out in order to examine the most attractive applications. The performance of an amorphous silica membrane was screened

The performance of commercially available polymeric and microporous silica membranes (both supplied by Sulzer Chemtech GmbH) was investigated with respect to the dehydration of binary mixtures of isopropyl alcohol (IPA)/water. The range of concentrations investigated (CH2O # 20 wt.%) was selected ac

The use of poly (dimethyl siloxane) PDMS hollow fibres was investigated in orange juice aroma recovery. Modules for pervaporation were designed and built for this purpose, scrutinized with binary ester-water feeds and compared to other module geometries using experimental enrichment factors and mass

In the present work, membrane processing was investigated in order to clarify and to recover aroma from tropical fruit juices. Pineapple and passion fruit juices were selected. Pervaporation experiments were also carried out with binary synthetic aqueous solutions of typical aroma components. Experi

In this article, three types of aromatic polyamides were prepared by the direct polycondensation of bis[4-(4aminophenoxy) phenyl] diphenyl methane (BAPDM) with various of aromatic diacids such as terephthalic acid (TPAc), 5-tert-butylisophthalic acid (TBPAc), and 4,4N-hexafluoroisopropylidenedibenzo