Patent ID: 9731286
Date: 2017-08-15
CPC Classifications: B01D,B01J,Y02T

Claim:
1. A method for making a high surface area, high pore volume porous alumina, the method comprising: forming a slurry of aluminum hydrate particles in an aqueous medium by simultaneously feeding streams of aqueous aluminum sulfate and aqueous sodium aluminate into a reaction vessel at a temperature of from 60° C. to 100° C. while maintaining the pH between about 4 and less than 6 for at least 30 minutes, adjusting the pH of the slurry of aluminum hydrate particles in the aqueous medium to a pH of from about 8 to less than 11, isolating aluminum hydrate particles from the aqueous medium at the pH of from about 8 to less than 11, drying the isolated aluminum hydrate particles, calcining the dried aluminum hydrate particles to form the high surface area, high pore volume porous alumina, wherein the high surface area, high pore volume porous alumina has a specific surface area of from about 100 to about 500 square meters per gram and a total pore volume after calcination at 900° C. for 2 hours of greater than or equal to 1.2 cubic centimeters per gram, wherein less than or equal to 15% of the total pore volume is contributed by pores having a diameter of less than 10 nanometers.