Sodium Bicarbonate → Sodium Carbonate Decahydrate

HRID 618599Notes

Reaction equation

HRID 618599 reaction equation
[C:1](=[O:4])([OH:3])[O-:2].[Na+:5]>[Cl-].[Na+].O>[OH2:2].[OH2:2].[OH2:2].[OH2:2].[OH2:2].[OH2:2].[OH2:2].[OH2:2].[OH2:2].[OH2:2].[C:1](=[O:2])([O-:4])[O-:3].[Na+:5].[Na+:5]

Participants

3

Reactant 1

HCID 516892Sodium Bicarbonate

Product 1

HCID 151402Sodium Carbonate Decahydrate

Reagents, catalysts & solvents 1

HCID 57417360Sodium chloride; waterSolvent

Procedure

A process for forming useful sodium salts by uniquely processing dilute mine brines obtained by solution mining of a sodium bicarbonate containing ore deposit with an aqueous solvent is disclosed. The dilute mine brine is reduced in sodium bicarbonate content to prevent precipitation of the sodium bicarbonate in subsequent crystallization of sodium carbonate decahydrate. The reduced mine brine is directed to a crystallizer operated to form pure sodium carbonate decahydrate crystals and a carbonate/bicarbonate containing mother liquor in which the bicarbonate content is less than 4.5% by weight. The mother liquor is then steam stripped to convert a portion of the dissolved sodium bicarbonate in the mother liquor to sodium carbonate to form a carbonate enriched brine. The carbonate enriched brine is then recycled as a portion of said aqueous solvent to be used in the solution mining of the ore deposit.

Workup

  1. customprecipitation of the sodium bicarbonate
  2. customin subsequent crystallization of sodium carbonate decahydrate

Sources & evidence

ORD record
ord-83bf8a192d294d7b9989757a864867d3
Source dataset
uspto-grants-1999_09
Patent number
US05955043

Reaction notes

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