| 摘要 |
1362879 Hydrolysis catalyst GULF RESEARCH & DEVELOPMENT CO 8 Dec 1971 [30 Dec 1970 25 Feb 1971] 57104/71 Heading B1E [Also in Division C2] In Examples 71, 74, 75, 78, 82-90, 95 and 97, there are mentioned hydrolysis-promoting catalysts which comprise the phosphates of Lonthanum, Cerium, Neodymium and Ythrium containing from 50 to 10,000 ppm of copper based on the total weight of the catalyst. In Example 79, lonthanum phosphate is impregnated with iron nitrate and in Example 81 this catalyst, after regeneration, was further impregnated with copper. Examples 21, 23 and 31 describe the preparation of mixed rare earth phosphate catalysts. |
