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Ferrierites; their process of manufacture

  • US 4,853,203 A
  • Filed: 11/23/1987
  • Issued: 08/01/1989
  • Est. Priority Date: 11/21/1986
  • Status: Expired due to Term
First Claim
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1. A crystalline synthetic ferrierite characterized by:

  • a) the following approximate formula;

    
    
    space="preserve" listing-type="equation">M.sub.x/n (T.sup.III O.sub.2).sub.x (Si.sup.IV O.sub.2).sub.36-xwhere TIII represents at least one element selected from the group of boron (BIII), aluminum (AlIII), gallium (GaIII) and iron (FeIII)x ranges from 0.05 to 6.6M is a compensation cationn is the valence of M.b) an X-ray diffraction diagram shown in Table 1B of the specification,c) a fluorine content after synthesis ranging from 0.2 to 1.6% by weight, andd) a SiIV /TIII molar ratio of at least about 4.75.

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