Research Abstracts

This work reports the pervaporative separation of ethanol from ethanol –ethyl ter butyl ether mixtures using a commercial membrane, PERVAP 2256, that previously showed an interesting behavior in the separation of methanolMTBE mixtures. Pervaporation flux has been obtained and analyzed as a function

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

Proteoheparan sulfate can be adsorbed to a methylated silica surface in a monomolecular layer via its transmembrane hydrophobic protein core domain. Due to electrostatic repulsion, its anionic glycosaminoglycan side chains are stretched out into the blood substitute solution representing one recepto

The synthesis of novel nanostructured mixed matrix membranes is presented in this contribution. The concept is to embed a liquid in which eventually a carrier can be located, as microscopically small droplets in a polymeric matrix. Preparation of capsules by applying and modifying of traditional enc