The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 1978
Filed:
Jun. 25, 1976
David E Vaughan, Columbia, MD (US);
Grant C Edwards, Silver Spring, MD (US);
W. R. Grace & Co., New York, NY (US);
Abstract
An improved process for preparing synthetic ferrierites having the absorption and catalytic properties characteristic of 5 to 8 angstrom zeolites which comprises promoting an alkaline reaction mixture comprising Group I and/or Group II cations, a source of silica, a source of alumina with lithium cations. The promoted reaction mixture is seeded with natural or synthetic ferrierite seeds, and heated to convert the mass to the synthetic ferrierite. The product has the empirical formula, 0.1 to 0.9 Li.sub.2 O:0.1:0.9 R.sub.2 0:Al.sub.2 O.sub.3 :6 to 25 SiO.sub.2 wherein R.sub.2 O is Na.sub.2 O, K.sub.2 O, or Rb.sub.2 O and/or Cs.sub.2 O; 0.1 to 0.9 Li.sub.2 O:0.1 to 0.9 WO:Al.sub.2 O.sub.3 :6 to 25 SiO.sub.2 wherein WO is BaO, CaO, MgO or SrO; or (Li.sub.2 O:R.sub.2 O:WO):Al.sub.2 O.sub.3 :6-25 SiO.sub.2 where R.sub.2 O is any R.sub.2 O above and WO is any WO above.