Reacción #47701

Ecuación de reacción

AIP

aluminum isopropoxide

water

2-propanol

AIP

→

γ-Alumina

aluminum hydroxide

Disolventes

MPD

2-methyl-2,4-pentanediol

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONOnce the mixture was mixed homogenously
2. 2
   Otrothe beaker was placed in a constant temperature bath at a temperature of about 120° C.
3. 3
   workup.STIRRINGstirred continuously for about an hour
4. 4
   Otroa clear yellowish green solution was obtained
5. 5
   Otroat the 120° C. reaction condition
6. 6
   Otroto terminate the gelation

Procedimiento

γ-Alumina support was prepared by utilizing a complexing agent-assisted sol gel method. 500 grams of aluminum isopropoxide (AIP) (98%+, Aldrich Chemical Company, Inc.) was dissolved in 600 ml of 2-methyl-2,4-pentanediol (MPD) (99% Aldrich Chemical Company, Inc) in a beaker. The resulting mixture was stirred vigorously with a mechanical polyethylene stirrer. Once the mixture was mixed homogenously, the beaker was placed in a constant temperature bath at a temperature of about 120° C. and stirred continuously for about an hour. Once all the AIP was dissolved, a clear yellowish green solution was obtained. The AIP reacts with MPD to yield 2-propanol in the form of a vapor at the 120° C. reaction condition and the solution begins to gel. Once the gelation is completed after 4 hours, 400 ml of water was added to terminate the gelation and yield a white precipitate (aluminum hydroxide). The white solid product was redispersed in water and aged at 90° C. overnight under constant stirring.

Fuente