BAYERITE Chemische Eigenschaften,Einsatz,Produktion Methoden
Chemische Eigenschaften
monoclinic, a=0.506 nm, b=0.867 nm, c=0.471 nm; used to make η-alumina catalyst [KIR78]
Physikalische Eigenschaften
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.
synthetische
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.
BAYERITE Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte