Chlorine → Sodium chromate tetrahydrate

HRID 1580846Notes

Reaction equation

HRID 1580846 reaction equation
[O-:1][Cr:2]([O:5][Cr]([O-])(=O)=O)(=[O:4])=[O:3].[Na+:10].[Na+].ClCl>[V]>[OH2:1].[OH2:1].[OH2:1].[OH2:1].[Cr:2]([O-:5])([O-:4])(=[O:3])=[O:1].[Na+:10].[Na+:10]

Participants

4

Reactant 2

HCID 24526ChlorineHCID 25408Sodium Dichromate

Product 1

HCID 22146515Sodium chromate tetrahydrate

Reagents, catalysts & solvents 1

HCID 23990VanadiumCatalyst

Procedure

A process for preparing sodium bichromate substantially free of vanadium and chlorine which comprises concentrating a sodium chromate liquor obtained from chrome-bearing minerals to form crystals of sodium chromate tetrahydrate, separating the tetrahydrate crystals from the liquor and recovering the crystals, treating the separated crystals with sulfuric acid to form the bichromate and recovering the sodium bichromate after separation of insoluble sodium sulfate formed.

Workup

  1. concentrationcomprises concentrating a sodium chromate liquor
  2. customobtained from chrome-bearing minerals

Sources & evidence

ORD record
ord-3453f52a0d524fb3a3357491939187f8
Source dataset
uspto-grants-1976_01
Patent number
US03933972

Reaction notes

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