| abstract |
The present invention provides a macroporous foam comprising microporous zeolite or the related microporous molecular sieves and preparation thereof, which comprises dipping an amino group-releasable polymeric template having a sponge or macroporous structure, which can be selected from a group consisting of polyurethane, polyamides, aromatic or aliphatic polyimides, polyamideimides, epoxy resins having an amine sketeton, and polymeric materials capable of releasing a organoamino group by hydrolysis, in an alkaline or acidic precursor gel of said zeolite or related molecular sieves, and reacting them at a suitable temperature for a period during which said polymeric template is completely or nearly completely replaced with zeolite or the related molecular sieves. Said foam comprising zeolite or the related molecular sieves has a sponge or macroporous structure similar to that of said polymeric template as well as the shape and size nearly identical with those of said template. |