Production of sodium sesquicarbonate and sodium carbonate monohydrate

Production of sodium sesquicarbonate and sodium carbonate monohydrate

  • CN 101,336,207 A
  • Filed: 12/18/2006
  • Published: 12/31/2008
  • Est. Priority Date: 12/21/2005
  • Status: Active Application
First Claim
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1. method of producing crystal concentrated crystal soda and yellow soda ash by solution pit current, it comprises:

  • (a) extract the water-based pit current that contain yellow soda ash and sodium bicarbonate out in the exploitation of the solution from the underground alkali mineral deposit hole;

    (b) in first crystallizer operation, crystallization concentrated crystal soda from these water-based pit current, and do not have a significantly cocrystallization of other alkaline matter, the water-based pit current of wherein introducing first crystallizer do not contain the sodium carbonate roasting thing of adding substantially, and described sodium carbonate roasting thing is selected from the concentrated crystal soda of roasting and the urao mineral of roasting;

    (c) isolation of crystalline concentrated crystal soda from the mother liquor of the first crystallizer slurry reclaims this crystal concentrated crystal soda as first product;

    (d) make at least a portion in the dissolved sodium bicarbonate residual in the isolating first crystallizer mother liquor of process be converted into carbonate in processing, this processing is enough to make crystal carbonate as the crystallization from the treated first crystallizer mother liquor of unique crystalline substance;

    (e) in second crystallizer operation, make crystal carbonate crystallization from the first crystallizer mother liquor of process separation and processing, and not having tangible concentrated crystal soda cocrystallization, the isolating first crystallizer mother liquor of process of wherein introducing second crystallizer does not contain the sodium carbonate roasting thing of the urao mineral of the concentrated crystal soda that is selected from roasting of adding and roasting substantially;

    (f) isolation of crystalline crystal carbonate from the mother liquor of the second crystallizer slurry reclaims this crystal crystal carbonate;

    With(g) the crystal crystal carbonate that reclaims is carried out drying, make heavy soda ash, as second product.

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