Sulfuric Acid → Sodium Sulfate

HRID 1586612Notes

Reaction equation

HRID 1586612 reaction equation
[Si]([O-])([O-])([O-])[O-].[Na+:6].[Na+].[Na+].[Na+].[S:10](=[O:14])(=[O:13])([OH:12])[OH:11]>>[S:10]([O-:14])([O-:13])(=[O:12])=[O:11].[Na+:6].[Na+:6].[S:10](=[O:12])(=[O:11])([OH:14])[OH:13]

Participants

4

Reactant 2

HCID 1118Sulfuric AcidHCID 26051Sodium orthosilicate

Product 2

HCID 1118Sulfuric AcidYield 3%HCID 24436Sodium SulfateYield 12.3%

Procedure

Neutral sodium silicate liquor (3.3:1 SiO2 /Na2O ratio, 25% SiO2) 8.5 liters/minute was mixed with dilute sulphuric acid (40% w/w) 3.4 liters/minute to produce a hydrosol with the composition 18.2% SiO2, 12.3% sodium sulphate and 3% excess sulphuric acid. The sol had a setting time of about 3 to 4 minutes at a temperature of 52° C. and was allowed to set on a continuously moving belt. The dimensions and speed of the belt were such that the mean residence time of the hyrogel on the belt was 10 minutes and its production rate 14.0 Kg/min.

Sources & evidence

ORD record
ord-8b44290e6809451fa488536120bf5c2d
Source dataset
uspto-grants-1993_06
Patent number
US05215733

Reaction notes

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