Sodium aluminate → Sodium aluminosilicate

HRID 227206

Reaction equation

HRID 227206 reaction equation
[Si:1]([O-])([O-])([O-])[O-:2].[Na+:6].[Na+].[Na+].[Na+].[O:10]=[Al-:11]=O.[Na+]>>[OH2:2].[O-2:10].[O-2:2].[O-2:2].[O-2:2].[O-2:2].[O-2:2].[Na+:6].[Na+:6].[Al+3:11].[Al+3:11].[Si+4:1]

Participants

3

Reactant 2

HCID 14766Sodium aluminateHCID 26051Sodium orthosilicate2×

Product 1

HCID 72941443Sodium aluminosilicate

Procedure

According to batch size, gel composition and contents of sodium silicate, sodium aluminate solution is prepared. This is added at a controlled rate and at ambient temperature to sodium silicate solution taken previously in a stainless steel reactor. Slurry of reaction mixture is allowed to crystallize at temperature 70-100° C. for 1 to 5 hours until Zeolite-A formation takes place. Zeolite-A slurry is filtered and washed till filtrate pH was ˜11 to 10.5. Wet cake thus obtained is dried in a dryer and dry powder was pulverized and subjected to analysis. The comparison of the properties of detergent builder Zeolite-A produced according to present invention (Example 10) and SASIL (Degussa-Henkel) is given in Table 1.

Workup

  1. customis prepared
  2. customtaken previously in a stainless steel reactor
  3. customSlurry of reaction mixture
  4. customto crystallize at temperature 70-100° C. for 1 to 5 hours until Zeolite-A formation
  5. filtrationZeolite-A slurry is filtered
  6. washwashed till filtrate pH was ˜11 to 10.5
  7. customWet cake thus obtained
  8. customis dried in a dryer
  9. customdry powder

Sources & evidence

ORD record
ord-a7b91d1aa1754fbbaf6a75c47af75f06
Source dataset
uspto-grants-2009_07
Patent number
US07560093B2

Linked notes

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