A process for the increase of the sio deep 2 / al deep 2 o deep 3 - hea keeping the context of large pore crystalline molecular sieve zeolite

摘要

Framework aluminum is extracted from crystalline zeolitic molecular sieves, using acetylacetone as the extracting agent. Prior to contact with the acetylacetone, the zeolite must be rendered substantially cation-deficient and be at least partially dehydroxylated. Other metal values can be substituted for the framework aluminum by contacting the zeolite either before or after acetylacetone extraction with a metal acetylacetonate. The products are useful hydrocarbon conversion catalysts.