Abstract: A material for reverse phase chromatography comprises surface modifying apolar and charged groups bound to a solid support, said charged groups being present in amounts of about 0.25 to about 22% of the surface modifying groups, or in amounts of about 0.01 ?mol/m2 to 0.8 ?mol/m2 referred to the surface of the solid support for a material with a total amount of surface modifying groups of 3.6 ?mol/m2. Such material and suitable purification conditions for active pharmaceutical ingredients (APIs) like peptides can be evaluated by (a) determining the isoelectric point (pI) of the API of interest, (b) choosing a pH in a range where the solid phase material is stable, (c) determining the difference pI?pH and (d) if the difference pI?pH is positive, choosing an anion exchange (AIEX) material, or if the difference pI?pH is negative, choosing an cation exchange (CIEX) material.

Abstract: A material for reverse phase chromatography comprises surface modifying apolar and charged groups bound to a solid support, said charged groups being present in amounts of about 0.25 to about 22% of the surface modifying groups, or in amounts of about 0.01 ?mol/m2 to 0.8 ?mol/m2 referred to the surface of the solid support for a material with a total amount of surface modifying groups of 3.6 ?mol/m2. Such material and suitable purification conditions for active pharmaceutical ingredients (APIs) like peptides can be evaluated by (a) determining the isoelectric point (pI) of the API of interest, (b) choosing a pH in a range where the solid phase material is stable, (c) determining the difference pI-pH and (d) if the difference pI-pH is positive, choosing an anion exchange (AIEX) material, or if the difference pI-pH is negative, choosing an cation exchange (CIEX) material.

Abstract: A desorption process and a process for producing a catalytically deactivated formed zeolitic adsorbent, whereby both processes are suitable to improve the lifetime of a formed zeolitic adsorbent in the removal of sulfur compounds from sulfur contaminated gas and liquid feed streams. The adsorbent is in particular a synthetic 13X or LSX faujasite with a silica to alumina ratio from 1.9:1.0 to about 3.0:1.0. The cations of the faujasite include alkali and alkaline earth metals. The formed zeolite mixture is preferably catalytically deactivated due to a phosphate treatment. The desorption is carried out thermally, wherein the heat treatment is done at different temperature stages to avoid decomposition of the organic sulfur compounds.

Abstract: Abstract Described is a desorption process and a process for producing a catalytically deactivated formed zeolitic adsorbent, whereby both processes are suitable to improve the lifetime of a formed zeolithic adsorbant in the removal of sulfur compounds from sulfur contaminated gas and liquid feed streams. The adsorbent is in particular a synthetic 13X or LSX faujasite with a silica to alumina ratio from 1.9:1.0 to about 3.0:1.0. The cations of the faujasite include alkali and alkaline earth metals. The formed zeolite mixture is preferably catalytically deactivated due to a phosphate treatment. The desorption is carried out thermally, wherein the heat treatment is done at different temperature stages to avoid decomposition of the organic sulfur compounds.

Abstract: Disclosed is a synthetic zeolite by means of which gas streams containing steam and carbon dioxide as impurities can be purified. The zeolitic adsorbing agent is a 13X type or LSX type faujasite or a mixture of both types that are deformed with a binder, at least some parts of which are highly dispersed. Said novel adsorption system allows extraordinarily high adsorption capacities to be obtained while keeping the mass transfer zones short resulting in a longer service life of the adsorption systems before carbon dioxide is able to break through.