Method for improving the color number of trimethylolpropane

Method for improving the color number of trimethylolpropane

  • CN 102,574,758 A
  • Filed: 08/06/2010
  • Published: 07/11/2012
  • Est. Priority Date: 08/07/2009
  • Status: Active Application
First Claim
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1. method that is used to prepare TMP;

  • The reaction of this method through butyraldehyde and formaldehyde in the presence of a kind of mineral alkali is with the reaction mixture that provides a kind of TMP of containing and subsequently this reaction mixture that contains TMP is carried out separation and purification, it is characterized in that this separation and purification process comprises that the temperature based on 50 ℃

    is arranged on from 5.25 to 5.45 value through formic acid with this pH that contains the reaction mixture of TMP.

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