Nitric Acid → Aluminum nitrate

Next an alumina precursor, basic aluminum nitroformoacetate (ANFA), was prepared. A solution was prepared by dissolving aluminum formoacetate (for preparation see Kirk-Othmer, Encyclopedia of Chemical Technology, 3d edition, Vol. 2, 202-204 (1978); Al:carboxylate=1:2; formate:acetate=1:1) in water with heating to yield a 6.4 wt.% fired solids content solution. A basic aluminum nitrate solution was prepared by charging a thick walled flask with 300 g of deionized water and 62.9 ml of concentrated HNO3, stirring and heating to a boil and adding 26.98 g of aluminum powder to the boiling mixture over a period of 2 hours in 5 lots of roughly 5 g each. Deionized water was added occasionally to keep the solution volume above 300 ml. After 4 hours when the dissolution of the aluminum was essentially complete, the solution was filtered through a Whatman #5 filter and found to be 18.5 wt. % alumina. A mixture of 200 g of the basic aluminum nitrate solution and 576.1 g of the aluminum formoacetate solution was boiled for 1 hour and filtered through a Whatman #5 filter. This resulting basic aluminum nitroformoacetate solution was found to contain 13.6 wt. % alumina.

1. customA solution was prepared
2. temperaturewith heating
3. customto yield a 6.4 wt.%
4. temperatureheating to a boil
5. filtrationthe solution was filtered through a Whatman #5
6. filtrationfilter
7. additionA mixture of 200 g of the basic aluminum nitrate solution and 576.1 g of the aluminum formoacetate solution
8. filtrationfiltered through a Whatman #5
9. filtrationfilter

ORD record

ord-ffb812ab1d424794b5e3ca2458707c4b

Source dataset

uspto-grants-1993_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05185299