反応 #324365
ord-8ddcf2cd89834c66bb4be89b8a8530c1
反応方程式
溶媒
反応条件
後処理
- 1ろ過was filtered while it
- 2その他to separate the catalyst
- 3濃縮The filtrate was concentrated
- 4その他by evaporating water under reduced pressure
- 5その他a rotary evaporator
- 6その他to precipitate crystals
- 7その他The precipitated crystals were separated by solid-liquid separation at room temperature
- 8その他dried
実験手順
A 5-L Hastelloy (HC22) autoclave was charged with 552 g of pyromellitic acid, 200 g of a catalyst, that is, rhodium carried on activated carbon, available from N.E. Chemcat Corporation, and 1,656 g of water. The inner atmosphere of the reactor was replaced with nitrogen gas under stirring. After replacing the inner atmosphere of the reactor with hydrogen gas, the hydrogen pressure in the reactor was adjusted to 5.0 MPa and the temperature was raised to 60° C. While maintaining the hydrogen pressure at 5.0 MPa, the reaction was allowed to proceed for 2 hours. Then, after replacing the hydrogen gas in the reactor with nitrogen gas, the reaction product solution taken out of the autoclave was filtered while it was still hot to separate the catalyst. The filtrate was concentrated by evaporating water under reduced pressure using a rotary evaporator to precipitate crystals. The precipitated crystals were separated by solid-liquid separation at room temperature and dried, thereby obtaining 481 g of 1,2,4,5-cyclohexanetetracarboxylic acid (yield: 85.0%).