Abstract: Method for the preparation of a sorbent material and for use of such a material for separating gaseous carbon dioxide from a gas mixture, preferably for direct air capture, using a temperature, vacuum, or temperature/vacuum swing process, comprising primary amine moieties immobilized on a solid support, wherein the primary amine moieties, in the ?-carbon position, are substituted by one hydrogen and one non-hydrogen substituent, wherein the sorbent material is in the form of a monolith, a layer, fibres, or particles, wherein the non-hydrogen substituent is selected from the group consisting of alkyl, alkenyl, arylalkyl, and wherein the solid support of the sorbent material is a porous material. Starting from a precursor of said sorbent material comprising one or multiple keto-groups, said one or multiple keto groups are converted into said primary amine moieties through a reductive amination.

Abstract: A method for separating gaseous carbon dioxide from a gas mixture, preferably from at least one of ambient atmospheric air (1), flue gas and biogas, by cyclic adsorption/desorption using a sorbent material (3), wherein the method comprises at least the following sequential and in this sequence repeating steps (a)-(e): (a) contacting said gas mixture (1) with the sorbent material (3) to allow gaseous carbon dioxide to adsorb; (b) isolating said sorbent material (3) from said flow-through; (c) inducing an increase of the temperature of the sorbent material (3); (d) extracting at least the desorbed gaseous carbon dioxide from the unit (8) and separating gaseous carbon dioxide from steam in or downstream of the unit (8); (e) bringing the sorbent material (3) to ambient atmospheric conditions; wherein said sorbent material (3) comprises primary and/or secondary amine moieties immobilized on a solid support, wherein the amine moieties, in the ?-carbon position, are substituted by one hydrogen and one non-hydrog

Abstract: Method for separating gaseous carbon dioxide from air, in particular from ambient atmospheric air (1), by cyclic adsorption/desorption using a sorbent material (3), wherein said sorbent material (3) is a solid inorganic or organic, non-polymeric or polymeric support material functionalized on the surface with amino functionalities capable of reversibly binding carbon dioxide, with a specific BET surface area, preferably measured by nitrogen adsorption, in the range of 1-20 m2/g.

Abstract: Provided are intermediates useful for the preparation of verapamil and methods for their preparation.