Oxygen → Orthosilicic acid

HRID 372174Notes

Reaction equation

HRID 372174 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 and 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-1b1d8b26114341758b5513eeb1c5e367
Source dataset
uspto-grants-1978_05
Patent number
US04089883

Reaction notes

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