Sodium Carbonate → Sodium Sesquicarbonate

HRID 1380795Notes

Reaction equation

HRID 1380795 reaction equation
[C:1](=[O:4])([O-:3])[O-:2].[Na+:5].[Na+].[OH-].[Na+]>O>[C:1](=[O:2])([O-:4])[O-:3].[Na+:5].[Na+:5].[C:1](=[O:2])([OH:4])[O-:3].[Na+:5]

Participants

4

Reactant 2

HCID 10340Sodium CarbonateHCID 14798Sodium Hydroxide

Product 1

HCID 10791Sodium Sesquicarbonate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

This Example describes an alternate embodiment of the present invention illustrated in FIG. 7 utilizing two-compartment water splitting to generate sodium carbonate and sodium hydroxide from trona ore. To a dissolver 710 equipped with a stirrer 711, is added trona ore via a line 712 and live steam via a line 714 to form a slurry of sodium carbonate/sodium bicarbonate and insolubles which is removed from the dissolver 710 via a line 716 and forwarded to a liquor purification tank 718. An aqueous sodium carbonate/sodium bicarbonate solution is removed from the tank 718 via a line 720 and forwarded to a crystallizer 722. Sodium bicarbonate solid, formed in the crystallizer 722, is removed via a line 726 and is fed to a centrifuge 727. The remaining aqueous solution of sodium carbonate and bicarbonate (mother liquor) is removed from the crystallizer 722 via a line 742a. In a secondary crystallizer 728, a more concentrated sodium carbonate solid and/or slurry is formed and removed via a line 730 to acid tank 732. An aqueous solution of sulfuric acid/sodium sulfate is added, via a line 740, to the tank 732. The source of sulfuric acid/sodium sulfate is the reaction product from the acid compartments A of the two-compartment electrodialytic water splitters 752 and 754 which is withdrawn via lines 740a and 740b, respectively. The composition of the source comprises about 1 to 15 weight % of sulfuric acid and about 10 to 30 weight % of sodium sulfate. In the acid tank 732 sodium bicarbonate reacts with sulfuric acid (from the source and also supplied via a line 736) to form sodium sulfate and carbon dioxide (which is removed via a line 734). The sodium sulfate produced in the acid tank 732 is removed via a line 738 for supply (via lines 738a and 738b) to the acid compartments of the two-compartment water splitters.

Workup

  1. dissolutionTo a dissolver 710
  2. customequipped with a stirrer 711

Sources & evidence

ORD record
ord-bf732e7462fb4dc28dd3f362220cbf28
Source dataset
uspto-grants-1986_04
Patent number
US04584077

Reaction notes

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