Dsm Fine Chemicals Austria Nfg Gmbh & Co. Kg

Dsm Chemie Linz Gmbh

Hafslund Nycomed Pharma Aktiengesellschaft

Dsm Fine Chemcials Nfg Gmbh & Co Kg

Walter Raml

Michael Stanek

Karlheinz Giselbrecht

Rudolf Hermanseder

Marion Wagner

Erich Steinwender

Gerhard Schoppel

Georg Haeubl

Ernst Wressnegger

Georg Häubl

Gunter Eichberger

Gunther Eichberger

Georg Haubl

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 for the drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups, comprising cationic N-containing groups, and suitable counterions, in which the gelled and washed polymers obtained by polymerization, crosslinkage and optionally alkylation are dried continuously using a gaseous medium under normal pressure or overpressure in a fluidized bed.

Process for the continuous drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups

Improved process for the purification and formulation of o-phthalaldehyde in which crude o-phthalaldehyde, obtained by cleavage of an acetal of o-phthalaldehyde by means of acidic hydrolysis, is, optionally by adding an aqueous basic solution, adjusted to a pH of from 1 to 8, and then, after phase separation has taken place, water is distilled off from the phase which contains the aldehyde with very short thermal stress of less than minute at a pressure of between 100 mbar and atmospheric pressure and a temperature of from room temperature to 180&deg; C. on a thin-layer overhead evaporator and o-phthalaldehyde is then stripped off from the distillation bottom which remains with very short thermal stress of less than 1 minute at a pressure of from 0.5 to 50 mbar and a jacket temperature of from 80 to 80&deg; C. via a thin-layer evaporator and the resulting o-phthalaldehyde melt is pelleted at atmospheric pressure and a temperature of from to &deg; C., giving pale yellow o-phthalaldehyde in high purity and storage-stable form.

Process for the purification and formulation of o-phthalaldehyde

Process for the purification of 5H-dibenz�b,f!a-zepine, which comprises evaporating 5H-dibenz�b, f!azepine under reduced pressure from a reaction mixture obtained by catalytic dehydrogenation of 10,11-dihydro-5H-dibenz-�b,f!azepine in the 1st step and depositing it as a solid, suspending the deposited product in an aromatic hydrocarbon in the 2nd step and then isolating pure 5H-dibenz�b,f!azepine.

Process for the purification of 5H-dibenz (B,F) azepine

Preparation of succinylcholine halides of formula I: ##STR1## by reacting dialkyl succinates with an excess dimethylaminoethanol in the presence of an alkali metal alcoholate or alkali metal amide catalyst and then reacting the resulting bis(2-dimethylaminoethyl) succinates with methyl halides.

Process for the preparation of succinylcholine halides

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Hellmonsödt, Austria

Walter Raml