B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/15
B01J 29/06 (2006.01) B01J 20/18 (2006.01) C01B 33/26 (2006.01) C11D 3/12 (2006.01)
Patent
CA 1148919
K-5974 ABSTRACT OF THE DISCLOSURE An improvement in the process for the production of aqueous, alkaline suspensions of finely divided low grit, crystalline, zeolitic sodium aluminosilicate by continuously mixing an aqueous sodium aluminate solution with an aqueous sodium silicate solution in the presence of excess sodium hydroxide solution at elevated tempera- tures and subsequently crystallizing the aqueous alkaline suspension of X-ray amorphous sodium aluminosilicate, so produced, at an elevated temperature, the improvement consisting of conducting said first mixing step at a temperature not to exceed 50° C, introducing finely- dispersed steam into said aqueous, alkaline suspension of X-ray amorphous sodium aluminosilicate for a period of at least 15 minutes while stirring, to heat said suspen- sion to a temperature of from 85° to 95°C, and crystal- lizing at this temperature for a period of 20 to 60 minutes while stirring with multistage agitators at a circumferential agitator speed of from 5 to 10 meters per second. When following the above procedures, a finely- divided crystalline zeolytic sodium aluminosilicate is obtained with an extremely low grit content of 0.05% or less by weight. -A-
373952
Carduck Franz-Josef
Christophliemk Peter
Koch Otto
Peters Bernd W.
Vogler Rainer
Aktiengesellschaft Degussa
Henkel Kommanditgesellschaft Auf Aktien (henkel Kgaa)
Macrae & Co.
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