Ferrous Sulfate → 14038-43-8

HRID 1701810Notes

Reaction equation

HRID 1701810 reaction equation
S([O-])([O-])(=O)=O.[Fe+2].[Fe-4:7](C#N)(C#N)(C#N)(C#N)(C#N)[C:8]#[N:9].[K+].[K+].[K+].[K+]>[Fe-4](C#N)(C#N)(C#N)(C#N)(C#N)C#N.[Na+].[Na+].[Na+].[Na+]>[C-:8]#[N:9].[C-:8]#[N:9].[C-:8]#[N:9].[C-:8]#[N:9].[C-:8]#[N:9].[C-:8]#[N:9].[Fe+6:7]

Participants

4

Reactant 2

HCID 24393Ferrous Sulfate2×HCID 178511492HCID 178511492, compound

Product 1

HCID 1195737214038-43-8

Reagents, catalysts & solvents 1

HCID 178511494HCID 178511494, compoundSolvent

Conditions

Temperature
40 °C

Procedure

5 Liters iron (II) sulfate solution is introduced into a reaction vessel (concentration: 90 g/l FeSO4.7H2O) and heated to a temperature of 40° C. Within 15 minutes 1700 ml potassium ferrocyanide solution (concentration: 85 g/l [Fe(CN)6 ]; temperature 40° C.) are introduced initially into this solution, followed within 45 minutes by 2700 ml sodium ferrocyanide solution (concentration: 85 g/l [Fe(CN)6 ]; temperature 40° C.). The pH values of the iron (II) sulfate solution and the [Fe(CN)6 ] solution are adjusted so that the precipitate has a pH of 3.0-3.5. The subsequent treatment of the white paste is as described in Example 1. Tests on the iron blue pigment thus obtained yielded the values shown in Tables I and II.

Sources & evidence

ORD record
ord-87ee8232822749f3b2cd6f48a6a51ad3
Source dataset
uspto-grants-1983_04
Patent number
US04378995

Reaction notes

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