反应详情

温度

55 °C

The sodium aluminosilicate of Example 44 was prepared as follows. Approximately 300 L of hot process water and 12.4 kg of anhydrous sodium sulfate were added to a 1200-L reactor. While mixing, the reactor contents were heated to 55° C., and 5.9 L of sodium silicate were added to the reactor and mixed. A 25-min simultaneous addition step with alum and silicate solution followed, using a sodium silicate addition rate of 19.9 L/min and an alum addition rate of 7.26 L/min. After the simultaneous addition step, a reduced alum flow rate (1-2 L/min) was used to bring the batch pH to about 5.3. After digesting the batch for 10 min, the product slurry was washed and filtered using a press filter. The filtered cake was collected. A portion of filtered cake was spray dried and hammer milled to an average 5-6 micron particle size.

1. additionWhile mixing
2. additionmixed
3. additionAfter the simultaneous addition step
4. customfor 10 min
5. washthe product slurry was washed
6. filtrationfiltered
7. filtrationfilter
8. customThe filtered cake was collected
9. customdried
10. customhammer milled to an average 5-6 micron particle size