Sodium Hydroxide → Tetraaluminum;trisilicate
Reaction equation
[Si:1]([O-:5])([O-:4])([O-:3])[O-:2].[Na+].[Na+].[Na+].[Na+].[Cl-].[Al+3:11].[Cl-].[Cl-].[OH-].[Na+]>>[Si:1]([O-:5])([O-:4])([O-:3])[O-:2].[Al+3:11].[Si:1]([O-:5])([O-:4])([O-:3])[O-:2].[Si:1]([O-:5])([O-:4])([O-:3])[O-:2].[Al+3:11].[Al+3:11].[Al+3:11]Participants
Conditions
- Temperature
- 100 °C
Procedure
A sodium orthosilicate aqueous solution (concentration 0.1 mol/L) and aluminum chloride (concentration 0.15 mol/L) were added in equivalent amounts with fully stirring. Further, 1N sodium hydroxide was gradually added to attain a pH of 6, the mixture was fully washed with water, and IN hydrochloric acid was added to attain a pH of 4. The mixture was heated at 100° C. for 2 days to give amorphous aluminum silicate. Washing with water was again carried out to remove a superfluous ion component, and then centrifugal separation was carried out to give a slurry of 20% concentrated amorphous silicate having a tubular structure (to be referred to as “moisture adsorbent (a-II)” hereinafter). Part of the slurry was dried to obtain moisture adsorbent (a-II) in the form of a powder, and the powder was measured for a specific surface area according to a BET method to show that it had a specific surface area of 450 m2/g.
Workup
- washthe mixture was fully washed with water
- additionIN hydrochloric acid was added
Sources & evidence
- ORD record
- ord-c1570fe091c44117b2726f3967cc0755
- Source dataset
- uspto-grants-2011_03
- Patent number
- US07897012B2
Reaction notes
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