| 摘要 |
<p>PURPOSE:To selectively adsorb ethylene in coexistence with much moisture by preparing an ethylene adsorbent with crystalline high silica zeolite contg. silver ions and having >=25 molar ratio of SiO2 to Al2O3 as an essential component. CONSTITUTION:An aq. soln. of a water soluble silver salt such as silver nitrate or silver sulfate and crystalline high silica zeolite are brought into an ion exchange reaction to obtain crystalline high silica zeolite contg. silver ions. The pref. amt. of the silver ions contained is <=10wt.%, especially 0.1-5wt.%. The pref. molar ratio of SiO2 to Al2O3 in the crystalline high silica zeolite is 25-500. An ethylene adsorbent is prepd. with one or more kinds of such crystalline high silica zeolite contg. silver ions but the zeolite may be mixed with bentonite, acid clay or kaolin as required.</p> |
