반응 #324365
ord-8ddcf2cd89834c66bb4be89b8a8530c1
반응 방정식
용매
반응 조건
후처리
- 1여과was filtered while it
- 2기타to separate the catalyst
- 3농축The filtrate was concentrated
- 4기타by evaporating water under reduced pressure
- 5기타a rotary evaporator
- 6기타to precipitate crystals
- 7기타The precipitated crystals were separated by solid-liquid separation at room temperature
- 8기타dried
실험 절차
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%).