Sodium Sulfate → Molecular sieve

HRID 1052332

Reaction equation

HRID 1052332 reaction equation
S([O-])([O-])(=O)=O.[Na+:6].[Na+].[Si:8]([O-])([O-:11])([O-:10])[O-:9].[Na+].[Na+].[Na+].[Na+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[Al+3:27].[K+]>O>[O-:10][Si:8]([O-:11])=[O:9].[O-:10][Si:8]([O-:11])=[O:9].[Na+:6].[Al+3:27]

Participants

5

Reactant 3

HCID 24436Sodium SulfateHCID 24856Potassium Alum3×HCID 26051Sodium orthosilicate2×

Product 1

HCID 19758701Molecular sieve

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
55 °C

Procedure

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.

Workup

  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

Sources & evidence

ORD record
ord-134a2860ff6349ba868987c8fe7ddd28
Source dataset
uspto-grants-2016_07
Patent number
US09388299B2

Linked notes

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