BAYERITE
- CAS No.
- 20257-20-9
- Chemical Name:
- BAYERITE
- Synonyms
- BAYERITE;Bayerite (Al(OH)3) (9CI)
- CBNumber:
- CB91414898
- Molecular Formula:
- AlH3O3
- Molecular Weight:
- 0
- MDL Number:
- MOL File:
- Mol file
BAYERITE Chemical Properties,Uses,Production
Chemical Properties
monoclinic, a=0.506 nm, b=0.867 nm, c=0.471 nm; used to make η-alumina catalyst [KIR78]
Physical properties
Habit: fine fibers.
Color: colorless.
Luster: silky.
Diaphaneity: translucent to transparent.
Streak: white.
Occurrence: precipitates of aluminum hydroxide gels onto carbonates at
pH > 5.8.
Preparation
Aluminum hydroxide (C.P. or better) is dissolved with moderate heating in sodium hydroxide solution (saturated in the cold) until saturation is attained. The solution is diluted with water to a density of 1.15 and suction-filtered through hard filter paper. Carbon dioxide is then bubbled through the filtrate for three days. The mother liquor is decanted from the resulting precipitate; the subsequent treatment is identical to that described for hydrargillite (I). The thoroughly washed and dried residue is pure bayerite.