• Advanced Questions

  Acid value drift

  Posted by OldPerry on November 14, 2017 at 4:07 pm

  Have you ever had a problem with the acid value of a raw material increasing over time?  Specifically materials like EGMS, EGDS, or PEG-100 Stearate?
  
  What would be the cause and how might it be prevented? 

  Bill_Toge replied 7 years, 1 month ago 3 Members · 6 Replies
• 6 Replies

• 

  DAS

  Member

  November 15, 2017 at 1:29 am

  Reverse acid esterification perhaps?. Are they all from the same brand?. 

• 

  OldPerry

  Member

  November 15, 2017 at 3:08 am

  I believe they all come from the same supplier.

• 

  Bill_Toge

  Member

  November 15, 2017 at 9:37 pm

  sounds like ester hydrolysis - how much is the acid value increasing by?

• 

  OldPerry

  Member

  November 15, 2017 at 9:55 pm

  Reportedly, it’s going over acid value = 9

• 

  DAS

  Member

  November 15, 2017 at 10:17 pm

  You should contact the factory, maybe a bad esterification ruined all the derivatives.  It’s all Hallstar?. You could contact R&D, with the batch number they must have a counter sample to at least, tell you why is happening and how to fix it. 

• 

  Bill_Toge

  Member

  November 15, 2017 at 11:49 pm

  it could also be the result of contamination

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