Abstract: A process is described for preparing a binder-free Zeolite Beta containing catalyst which has a highly dispersed noble metal incorporated into the framework. The process comprises steaming Zeolite Beta, followed by noble metal incorporation and calcination. The present invention is also directed to an improved calcination process.

Abstract: A process is described for regenerating a coke and poison deactivated noble metal-containing zeolite catalyst material. The activity of the catalyst after oxygen regeneration can be improved by treating the oxidized catalyst at temperatures from 100.degree. to 250.degree. C. (212.degree.-482.degree. F.) or lower, preferably 100.degree. to 200.degree. C. (212.degree.-392.degree. F.), or most preferably 150.degree. to 200.degree. C. (302.degree.-392.degree. F.), in a reducing atmosphere, as opposed to higher conventional reducing temperatures. The process permits catalyst reactivation by removing coke and other poisons, such as nitrogen, from the catalyst while avoiding excess agglomeration of the noble metals thereon.

Abstract: A process is described for rejuvenation of a deactivated highly siliceous noble metal-containing zeolite catalyst having a framework silica to alumina ratio of at least about 20 which contains agglomerated noble metal in its deactivated state. The process comprises redispersing the noble metals associated with the deactivated catalyst by contacting the catalyst with a stream of inert gas containing molecular chlorine, water and optionally, oxygen, a temperatures ranging from about 150.degree. to about 450.degree. C., a partial pressure of chlorine of from about 6 to about 15 Torr and a ratio of partial pressure of water to partial pressure of chlorine of from about 0.01 to about 2 for a period of time sufficient to achieve redispersion; purging said catalyst with an inert gas; and reducing said purged catalyst in a stream of hydrogen at a temperature ranging from about 140.degree. C. to 550.degree. C.

Abstract: A process is described for rejuvenation of a deactivated highly siliceous noble metal-containing zeolite catalyst which contains agglomerated noble metals. The process comprises initially reducing the deactivated catalyst in hydrogen, pretreating the thus reduced catalyst with an inert gas stream containing about 0.001 to 10 weight percent hydrogen chloride, redispersing the noble metal with an inert gas stream containing about 0.001 to 10 weight percent Cl in the form of Cl.sub.2 or Cl-containing organic material, and subsequently reducing the catalyst. The Cl-treatments may optionally occur in the presence of oxygen or sources of oxygen.

Abstract: A method for preparing hydroisomerization zeolite catalysts containing a highly dispersed noble metal is described. The method includes mix mulling the zeolite, noble metal and binder into an extrudate and chemically treating the formed particles in order to achieve a high dispersion of noble metal on the catalyst.