Recovery of carboxylic acid from their magnesium salts by precipitation using hydrochloric acid, useful for fermentation broth work-up

Recovery of carboxylic acid from their magnesium salts by precipitation using hydrochloric acid, useful for fermentation broth work-up

  • CN 103,813,977 A
  • Filed: 08/16/2012
  • Published: 05/21/2014
  • Est. Priority Date: 08/16/2011
  • Status: Active Application
First Claim
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1. prepare the method for succsinic acid, described method comprises the steps:

  • -Magnesium succinate is provided;

    -use hydrogenchloride (HCl) acidifying Magnesium succinate, thus obtain comprising succsinic acid and magnesium chloride (MgCl 2) solution;

    -optional enrichment step, wherein makes to comprise succsinic acid and MgCl 2solution concentrated;

    -from comprising succsinic acid and MgCl 2solution in precipitate succsinic acid, thereby obtain succsinic acid precipitation and MgCl 2solution;

    -make MgCl 2solution stands thermal decomposition steps at the temperature of at least 300 ℃

    , thereby by MgCl 2be decomposed into magnesium oxide (MgO) and HCl.

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