Oxygen → Orthosilicic acid

HRID 596525Notes

Reaction equation

HRID 596525 reaction equation
O.O.O.O.O.[O-:6][Si:7]([O-:9])=[O:8].[Na+:10].[Na+].[S:12](=[O:16])(=[O:15])([OH:14])[OH:13].O=O>>[Si:7]([OH:13])([OH:9])([OH:6])[OH:8].[S:12]([O-:16])([O-:15])(=[O:14])=[O:13].[Na+:10].[Na+:10]

Participants

5

Reactant 3

HCID 977OxygenHCID 1118Sulfuric AcidHCID 61495Silicic acid (H2SiO3), disodium salt, pentahydrate

Product 2

HCID 14942Orthosilicic acidHCID 24436Sodium Sulfate

Procedure

About 150 parts by weight of sodium metasilicate pentahydrate are slowly added to about 75 parts by weight of concentrated sulfuric acid while agitating and keeping the temperature below 100° C. The reaction takes place under ambient pressure; oxygen is evolved and the reaction is complete in 1 to 2 hours, thereby producing a white granular silicic acid compound and sodium sulfate. The mixture is washed with water, filtered to remove the salt and water, thereby recovering the silicic acid compound. The silicic acid compound is air dried at 25° to 75° C.

Workup

  1. customthe temperature below 100° C

Sources & evidence

ORD record
ord-1d25e97c74604bc9bca836414a2b2058
Source dataset
uspto-grants-1977_03
Patent number
US04011253

Reaction notes

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