abstract |
New ferrierites are disclosed as well as their process of manufacture. According to the invention, these new ferrierites are characterized by: (a) The following approximate formula: Mx/n(TIIIO2)x(SiIVO2)36-x wherein TIII is at least one element selected from the group formed of boron (BIII),aluminum (AlIII),gallium (GaIII) and iron (FeIII) x ranges from 0.05 and 6.6 M is a compensation cation n is the valence of M. (b) A particular X-ray diagram, (c) A fluorine content after synthesis ranging from about 0.01 to 1.6% by weight, and (d) A SiIV/TIIImolar ratio of at least 4.75. |