Dsm Fine Chemicals Austria Nfg Gmbh & Co. Kg

Chemie Linz Gesellschaft M.b.h.

Marion Wagner

Gerhard Schoppel

Georg Haeubl

Erich Schulz

Gerald Summer

Helmuth Kirsch

Michael Stanek

Peter Pochlauer

Walter Raml

Ernst Wressnegger

Georg Häubl

An apparatus and process for defined comminution of polymer gels, wherein the apparatus includes a static cutting element in the form of a cutting screen. The cutting element is optionally supported, and has pretensioned wires, rods, fibers, wovens, stencils or profiles. Optionally, a dynamic cutting element is provided for shortening the gel strands or particles obtained by means of the static cutting unit. Also, a feed unit is provided for feeding the polymer gel to the static cutting element in a clamped-in, shape-stable state. The feeding of the gel is effected batchwise or continuously.

Process and apparatus for defined comminution of polymer gels

Process and apparatus for defined communication of polymer gels

Process for the preparation of alkylated N- or amino, ammonium or spirobicyclic ammonium group-containing, crosslinked polymer gels, which is characterized in that

Preparation of alkylated N- or amino, ammonium or spirobicyclic ammonium group-containing, crosslinked polymers

Process to separate racemic mixtures of beta-hydroxy or beta-acyloxy-delta-valerolactones, which in position 2 and/or 5 of the lactone ring are substituted by hydrogen, alkyl groups having 4 to 20 C atoms, which are optionally penetrated by an oxygen atom, or by aralkyl groups, whereby not both positions are substituted by hydrogen, through reaction of the racemic mixture in the presence of a hydrolase with or without esterifying agent in a diluent and separation of the reaction mixture, which contains an enantiomerically pure beta-hydroxy-delta-valerolactone and an enantiomerically pure beta-acyloxy-delta-valerolactone, through conventional methods into the enantiomically pure compounds, a process for the manufacture of enantiomerically pure oxetanones using said separation process and enantiomerically pure beta-acyloxy-delta-valerolactones.

Enzymatic process to separate racemic mixtures of delta valerolactones

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Katsdorf, Austria

Marion Wagner