Patent ID: 9138706
Filing Date: 2015-09-22
Classification: B01J,F17D,Y10T

Abstract:
1. A method of enhancing the activity of a dehydrogenation catalyst promoted with an alkali metal during a catalytic dehydrogenation reaction, comprising: forming a first solution by utilizing an apparatus for adding an alkali metal salt to steam; the apparatus having a first conduit capable of transporting a first stream of the alkali metal salt, the first conduit having at least one opening through which the first stream can exit the first conduit; a second conduit in fluid communication with the first conduit, wherein the second conduit is capable of transporting a second stream comprising steam, wherein as the first stream exits the first conduit it is vaporized into the second stream forming the first solution containing alkali metal salt of the first stream in solution with the steam of the second stream; and bringing the first solution into contact with the dehydrogenation catalyst; wherein the first solution is obtained by contacting the first stream with the second stream in a con-current flow arrangement; wherein the second conduit contains the at least one opening of the first conduit forming a mixing chamber, wherein a diffuser is located downstream of the at least one opening of the first conduit in the mixing chamber to dissipate the first stream into the second stream, wherein the first stream is vaporized into the second stream to form the first solution; wherein the mixing chamber comprises exterior walls having an outer surface; and wherein the apparatus further comprises a weir adapted to restrict a flow of any of the alkali metal that is not dissipated into the second stream, wherein the weir is located downstream from the at least one opening of the first conduit and upstream of a dehydrogenation reaction zone.