초록 ▼

Substantially pure boehmite is produced by heating an aqueous sodium aluminate solution to a temperature of about 115°-145°C., preferably about 120°-130°C., treating the heated solution with alumina seed material and separating a boehmite precipitate from the solution. A particularly preferred seed

Substantially pure boehmite is produced by heating an aqueous sodium aluminate solution to a temperature of about 115°-145°C., preferably about 120°-130°C., treating the heated solution with alumina seed material and separating a boehmite precipitate from the solution. A particularly preferred seed material is boehmite gel.

대표청구항 ▼

A process for producing substantially pure boehmite comprising the steps of (a) heating to a temperature of about 115°-145°C. an aqueous aluminate solution containing about 100-400 g/l caustic soda (expressed as Na2CO3) and about 0.50-0.80 grams Al2O3 per gram of caustic soda (expressed as Na2CO3),

A process for producing substantially pure boehmite comprising the steps of (a) heating to a temperature of about 115°-145°C. an aqueous aluminate solution containing about 100-400 g/l caustic soda (expressed as Na2CO3) and about 0.50-0.80 grams Al2O3 per gram of caustic soda (expressed as Na2CO3), (b) treating the heated solution with a seed material consisting essentially of alumina, thereby to form a precipitate comprising greater than about 95 wt % boehmite, and (c) separating precipitated boehmite from the heated solution, thereby to form a used solution.