Activity

• 
  Tyss → Bill_Toge

  Dear professor,

  I need your help for a problem  i encountered with my liquid soap formula

  I used as viscosity agent for my liquid soap (55% olive oil and 45% copra) at 20% dry matter modified hydroxyethyl cellulose of the order of 1% I found a viscosity of the order of  759 CP at 20 ° C which is not normal
  I passed the sample to centrifugation test for 15 minutes at 30 rpm per minute, a deposit at the bottom of the tube appears.
  the same phenomenon appears in the sample placed  at 50 ° C for 1 day
   I did not understand what happened
  

  the operating mode is as follows:
  1- first step: saponification of the fatty substance with caustic potash
  2- pH adjustment with citric acid (ph: 10.3 ,sol 10%)
  3-Addition of the chelating agent (edta 4Na)
  4- Adjustment of the viscosity with the addition of 1% of modified hydroxyethyl cellulose (hydrophobical hydroxyethyl cellulose): addition in solution with water (the amount of water added is 10 times the amount of HEC required.

   I need your help
  

  Looking forward to your feedback

  Best regards

  Tyss

  September 1