数種の遷移元素を含む合成ゼオライトの調整法

A simple method of preparing the Linde Molecular Sieve Type A and X containing transition elements such as iron, cobalt , and nickel was developed to produce material which would be useful as a catalyst. Ethyl orthosilicate was directly hydrolysed by the sodium alummate solution with excess sodium hydroxide to produce LMS A and X after 24 hours keeping the mixture at 100℃. When the sulphate or chloride of iron or nickel or cobalt was added to the excess alkaline sodium aluminate solution, LMS containing the transition element was formed. For the starting solution, the ratio of silica to alumina, 7, sodium oxide to silrca, 5, was the best in case of the X type, and the former ratio, 2 or 3, the latter ratio 3 or 6 was preferable for the A type. All the experiments was proceeded in the starting mixture with the ratio of water to sodium oxide equal to 50. The produced synthetic zeolite containing iron or cobalt or nickel with the ratio of silica to the transition elemet equal to 30 or 20％ Was as crystalline as the commercial LMS using powder X-ray method.