Abstract: A process for separating the diastereomers of RSS— and SSS—N-?[1-carboxy-3-phenylpropyl]lysylproline is described. Previous chromatographic processes for separating the diastereomers of this peptide active substance, such as for example adsorption chromatography, exhibited disadvantages with regard to the solvents used and throughput. These disadvantages do not occur if basic ion exchangers are used in the chromatographic separation of the diastereomers. In particular, purely aqueous solutions may be used as the eluent.

Abstract: A process for separating the diastereomers of RSS— and SSS—N-?[1-carboxy-3-phenylpropyl]lysylproline is described. Previous chromatographic processes for separating the diastereomers of this peptide active substance, such as for example adsorption chromatography, exhibited disadvantages with regard to the solvents used and throughput. These disadvantages do not occur if basic ion exchangers are used in the chromatographic separation of the diastereomers. In particular, purely aqueous solutions may be used as the eluent.

Abstract: The invention relates to a special amino acid mixture for hemodialysis as well as to the dialysis solution that can be prepared from the amino acid mixture. When the amino acid mixtures according to the invention are used for such purposes, the “shrinking men” phenomenon cam be prevented. The present invention also relates to a hemodialysis process and apparatus. This aspect of the invention provides a closed dialysis system with a dialyzer solution containing the amino acid mixtures according to the invention.

Abstract: The invention relates to a special amino acid mixture for hemodialysis as well as to the dialysis solution that can be prepared from the amino acid mixture. When the amino acid mixtures according to the invention are used for such purposes, the “shrinking men” phenomenon can be prevented. The present invention also relates to a hemodialysis process and apparatus. This aspect of the invention provides a closed dialysis system with a dialyzer solution containing the amino acid mixtures according to the invention.

Abstract: An amino acid composition suitable for hemodialysis and a dialysis solution that can be prepared from the amino acid mixture. When the inventive amino acid composition is used for this purpose, the “shrinking men” phenomenon can be prevented. Also provides are a hemodialysis process and apparatus.

Abstract: Process for separating and/or isolating organic compounds which are soluble in water, some of which are adsorbed on finely divided inorganic solids, by adsorption of this fraction and isolation of the loaded solid, which is characterised in thata) the solutions containing the organic compounds are placed in contact with a suitable solid, then cross-flow filtration is performed byb) allowing the suspensions produced to flow alongside a porous surface/membrane, whereinc) a pressure difference is set up between the side being flowed over and the opposite side of the surface/membrane,d) so that a fraction of the solution from which adsorbable compounds (a) have been partly or completely removed and is flowing over the surface/membrane passes through the surface/membrane in atransverse direction with respect to the direction of flow (filtrate flow),e) the non-adsorbed organic compounds (b) are isolated from this fraction,f) the fraction of solution or suspension which does not pass through the surface/membrane, op

Abstract: A process for the isolation of L-leucine and L-isoleucine from an aqueous solution containing these amino acids and their separation from each other by contacting the solution with a zeolite under acid conditions.