Page 108 - Principles of Catalyst Development
P. 108

96                                                       CHAPTER  6
                               TABLE  6.1.  Types of Catalysts

                       Category              Class               Examples

             A.   Single  active  component   1.  Single oxides   AI,OJ,  SiO"  Cr,O,
                 and  supports         2,  Dual  oxides   SiOrAI,O"  NiO-AIPJ'
                                                            CuO-AI,O, zeolites
             B,   Deposition-produced   3,  Dispersed  oxides   MoO,/ AI,O,
                 activity  component   4,  Dispersed  metals   0,3%  Pt/ Al,Ol
                                         low  loading
                                       5,  Dispersed metals   40%  Nil AI,O,
                                         moderate loading
            C.   Extraction-produced   6,  Dispersed  metals   70%  Nil AI,O,
                 active  component       high  loading
                                       7,  Porous  metals   Raney  Ni
                                       g,  Fused  oxides   Fe,04-AI,O,-K,O
             D,   Special  types       <),  Mixed oxides   ZnO, ZnCr,04
                                      10,  Cemented oxides   NiO-CaAI,04
                                      I 1.  Metal  gauLe   Pt,Ag
                                 _._- ----_ ..








                           I METAL  SAL T  SOLUTION I
                                    !          pH  adjustment


                                 nucleation
                                    I          precipitation
                                  growth

                                   aging       agglomeration
                                I HYDR:OGEL I
                               washing/tiltra tion
                                    I         purification
                                  drying      concentration
                                I XERtGEL I
                                              pelletization,  extrusion,
                                 formulation   sph eroidiz a t i on
                                , PAR~ICLE I

                                 calcination
                                    I
                                'CATALYST I
                     Figure 6.1.  Preparation steps  for  hydrous oxides and  supports,
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