| 摘要 |
PURPOSE:To obtain an adsorbent which selectively adsorbs specific substances in accordance with the kind of chemical substance by chemically vapor- depositing silica on the surface of A-type zeolite as an adsorbent. CONSTITUTION:The pore inlet diameter of A-type zeolite is controlled with accuracy by the thin film of silica grown by piling up silicate compound such as alkoxide silicate on the external surface of the A-type zeolite as an adsorbent using chemical vapordeposition technique. In this way, the pore size of zeolite is controlled in accordance with the size of molecules of a chemical substance to be adsorbed to generate a molecular sieve effect. Subsequently, an adsorbent is obtained which adsorbs and isolates the chemical substance with high selectivity, if the size of the molecule differs slightly. |
