Membrane reactor

Membrane reactor

CALENDAR Events Calendar 5-9 November2001 AIChE 2001 Annual Meeting, 7th Conference of Food'Engineering (including Membrane Separations in Food & Pha...

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Events Calendar 5-9 November2001 AIChE 2001 Annual Meeting, 7th Conference of Food'Engineering (including Membrane Separations in Food & Pharmaceuticals) Reno, Nevada, USA Contact: Meetings Department, American Institute of Chemical Engineers,3 Park Avenue, New York NY 10016-5991, USA. Tel: +1 212 591 7338 Fax: +1 212 591 8894 Email: [email protected]

Email: [email protected]

4-6 December 2001 Filtration 2001 International Conference & Exposition Chicago, Illinois, USA Contact: INDA, PO Box 1288, Cary, NC 27521-1288, USA Teh+l 919 233 1210 Fax: +1 919 233 1282

4-7 December2001 3-7 December 2001 7th Pacific Polymer Conference Oaxaca, Mexico Contact: T. Ogawa, Instituto de Investigacionesen Materiales, UNAM, Ap. 70-360, CU, Coyoacan, Mexico DF 04510, Mexico. Tel: +52 5 622 4583 Fax: +52 5 616 1201

Pollutec Industrie 2 0 0 1 , 1 7 t h I n t e r n a t i o n a l Exhibition of Environment Equipment, Technologies & Services for Industry Paris-Nord Villepinte, France Contact: Antoinette Riley, Pollutec 2001, Reed ExpositionsFrance,70 rue Rivay, F-92532 Levallois-Perret,France. Tel: +33 1 4756 5060

Research Trends Membrane reactor The application of homogeneously soluble catalysts is limited by the recovery in cases where the price of the catalyst is high. Biological catalysts, enzymes, can be efficiently recycled by means of an ultrafiltration membrane, for example in a continuouslyoperated membrane reactor, because of their high molecular weight. In order to transfer this principle to chemical catalysis, a transfer hydrogenation catalyst (fb:st invented by Gao and Noyori) has been attached to a polymer. The resulting homogeneously soluble, polymer-bound catalyst (chemzyme) can now be retained by ultrafiltration membranes like enzymes. On applying this catalyst in continuously-operated mcmbrane reactors, a contiuuous isopropoxide dosage is necessary in order to compensate deactivation caused by water residues in the feed stream. Thus, high space-time yields up to 578 g L 1 d I, and enantioselectivities up to 94% can be achieved. These results were compared to an enzymecatalyzed system consisting of a carbonyl reductase that also utilizes 2-propanoi as a hydrogen source for the co-factor regeneration of NADH. S. Laue, L. Greiner, J. W61tinger, A. Liese: Advanced Synthesis & C}~talysis 343(6-7) 711-720 (August 200I).

Membrane TechnologyNo.139

Fax: +33 1 4756 2425 Email: [email protected] 3 - 6 February 2002 M i d d l e East Electricity and M i d d l e East W a t e r & Environment Technology Conference Dubai World Trade Centre, United Arab Emirates Contact: IIR Exhibitions, PO Box 28943, Dubai, United Arab Emirates. Tel: +971 4 336 5161 Fax: +971 4 336 0137 Email: [email protected]

4-8 February2002 Third Course in Membrane Technology in Drinking & Industrial Water Treatment Processes- Principles, Design and Applications

Supported liquid-membrane extraction Use of the supported liquid-membrane (SLM) technique for (aminomethyl)phosphonic acid (AMPA) extraction is presented. For the extraction of this analyte, a suitable S[.M systenr involves a liquid membrane containing Aliquat 336 - a cationic carrier that Facilitates AMPA transport. The extraction of this compound, as in the case of glyphosate, is dependent on the donor phase pH and the concentration and type of counter-ion in the acceptor phase, although some differences are also observed. In both cases the transport mechanism is counter-coupled, in which the driving force of mass-transport over the membrane is created by the gradient of chloride anions from the acceptor to donor phase. P. Dzygiel, P.. Wieczorek: J. of Separation Science 24(7) 561-566 (August 2001)

Glow-discharge-modified polyurethane membranes Polyurethanes are a class of polymers that have a wide range of applications in the medical field. However, their blood compatibility still needs improvement. In order to obtain medical purity, this study prepared membrane-form polyurethanes from toluene 2,4-diisocyanate (TDI) and poly(propylene ethylene glycol) without the addition of any ingredients such as solvents, catalysts, or chain exrenders. The aim was to increase surface hydrophilicity and improve blood compatibility. Therefore, the prepared membranes were modified by treatment with oxygen or argon plasmas. Characterization of

Delft, The Nethedands Contact: Dr Maria Kennedy, International Institute for Infrastructural, Hydraulic and Environmental Engineering Delft, The Netherlands Tel: +31 15 21 51 774 Fax +31 15 21 22 921 Emaih [email protected]

4-6 May 2002 EUROMED 2002 Conference: Desalination Strategies in South M e d i t e r r a n e a n Countries Sharm-EI-Sheikh, Egypt Contact: Professor Dr. R.R. Zahran Department of Chemical Engineering Faculty of Engineering Alexandria University, Alexandria 21544 Egypt Tel: +203 591 1152 Fax: +203 591 4340 Email: [email protected], or Email: [email protected]

the samples was achieved by contact-angle and water-uptake studies as well as from atomic force microscope (AFM) pictures. It was found that oxygen-modified samples were more hydrophilic than argm>modified samples. The AFM images showed that surface roughness increased with plasma treatment. The protein adsorption experiments carried out with single protein solutions demonstrated that the adsorption of bovine serum albumin and fibrinogen decreased drastically by increasing the applied power and exposure time of the glow discharge. A similar decrease in the adsorption of protein was also observed for human blood proteins. The alterations of the confotmational structures of" the adsorbed proteins were examined by fluorescence spectrophorometry. Similar spectra with the same maximum wavelength were observed for native and desorbed proteins. These results showed that no denaturation of the proteins occurred upon adsorption on the surfaces of the prepared membranes. N. Kayirhan, A. Dcnizli, N. Hasirci: J. ofApplied Polymer Scielwe 81(6) 1322-1332 (8 August 2001).

Silane-modified PVC pervaporation membranes for bromoform/water separation Tile transport properties of a unique family of silane-modified poly(vinyl chloride) (PVC) pervaporarion membranes for the separation of halogenated hydrocarbons from water were investigated. The PVC was modified by using a vinyl silane to improve its resistance to attack by halogenared hydrocarbons, and to