1994 Fiscal Year Final Research Report Summary
Selective Hydrogenation Processes by Means of a Catalyst Preparation Method Using Volatile Metal Complexes
| Project/Area Number |
05650777
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
触媒・化学プロセス
|
|---|
| Research Institution | Saitama University |
|---|
Principal Investigator |
MIURA Hiroshi Saitama University, Department of Applied Chemistry, Associate Professor, 工学部, 助教授 (60092574)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MATSUDA Tsuneo Saitama University, Department of Applied Chemistry, Professor, 工学部, 教授 (40008826)
|
|---|
| Project Period (FY) |
1993 – 1994
|
| Keywords | Volatile Complex / Bimetallic Catalyst / Selective Hydrogenation / Crotonaldehyde / Crotylalcohol / Zirconium dipivaloilmethanato |
|---|
| Research Abstract |
Preparation of Co-based bimetallic catalysts has been tried using volatile metal complexes as precursors, and a highly selective catalyst in partial hydrogenation of crotonaldehyde has been found. Addition of Zr (dpm) 2 complex in Co/A1203 improved both activity and selectivity of the catalyst in hydrogenation of crotonaldehyde to form crotylalcohol. Other Zr-complexes, less volatile than Zr (dpm) 2, suggested inferior effect, and the volatility of the precursor is the critical factor. The state of Zr after decomposition of Zr (dpm) 2 was studied. The precursor decomposed in hydrogen flow in the presence of Co and deposited a thin film consisting of ZrO2 as the main component. However low valent Zr (Zr^0) was also found by XPS,and such low valent Zr seemed to result in the high selectivity. Formation of such low valent Zr was unique for our preparation method. The optimization of the reaction condition was tired and finally highest yield of crotylalcohol was found to be more than 80%. This catalyst is more active than any other catalyst reported in the literature. Addition of Zr in Co accelerated the C=O hydrogenation, and suppressed the C=C hydrogenation.
Our new method of catalyst preparation was effective in introducing catalyst promoter in special valence state, and useful in the development of new catalyst systems.
|
