Sodium Silicate → Sodium orthosilicate
Reaction equation
[OH2:1].O.P([O-])([O-])(O)=O.[Na+:8].[Na+].[O-:10][Si:11]([O-:13])=[O:12].[Na+].[Na+]>>[Si:11]([O-:1])([O-:13])([O-:10])[O-:12].[Na+:8].[Na+:8].[Na+:8].[Na+:8]Participants
Procedure
A phyllosilicate was prepared as in EP-A-0 731 058 by dissolving 1319 g of disodium hydrogenphosphate dihydrate in 60 kg of water glass having a percentage composition Na2O/SiO2/H2O=15.3/29.7/55 (% by weight), and the solution was spray-dried in a laboratory spray drier (spray tower) from Anhydro to give an amorphous sodium silicate with an active substance content of 83%. 15 kg of the amorphous sodium silicate were heat-treated at 720° C. for 90 min in a muffle furnace (Narbertherm, model W1000/H). This was repeated once more. The cooled silicate powder (about 24 kg) was pulverized using a jaw crusher and a disk mill. 2.55 kg of the silicate powder were mixed with 450 g of Arbocell FIC 200 in a tumble mixer. The mixture was compacted in accordance with the general procedures “Roll compaction” at a pressure of 60 kN, and processed in accordance with the general procedure “Production of particle size fractions” to give a particle size fraction of from 500 to 1000 μm.
Workup
- customA phyllosilicate was prepared as in EP-A-0 731 058
- customthe solution was spray-dried in a laboratory spray drier (spray tower) from Anhydro
Sources & evidence
- ORD record
- ord-a45e91e4ede4435e803e0254065a8714
- Source dataset
- uspto-grants-2003_01
- Patent number
- US06506722B1
Reaction notes
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