Substitution of cr and/or sn in place of a1 in the framework...

B - Operations – Transporting – 01 – J

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252/1, 182/10, 4

B01J 29/04 (2006.01) B01J 29/89 (2006.01)

Patent

CA 1317270

D-15,753 SUBSTITUTION OF Cr AND/OR Sn IN PLACE OF Al IN THE FRAMEWORK OF MOLECULAR SIEVE VIA TREATMENT WITH FLUORIDE SALTS ABSTRACT OF THE DISCLOSURE Molecular sieve compositions are prepared by extracting aluminum and substituting chromium and/or tin for extracted aluminum to give molecular sieve products containing framework chromium and/or tin atoms. The process of preparing the chromium and/or tin-containing molecular sieves invloves contacting a starting molecular sieve with a solution or slurry of at least one of a fluoro salt of chromium or a fluoro salt of tin under effective process conditions to provide for aluminum extraction and substitution of chromium and/or tin. 0527u

586063

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