• Formulating

  difference in viscosity between lab scale and pilot scale

  Posted by lopamudra on March 31, 2017 at 4:27 am

   a facewash formula based on ultrez 20,SLES 2EO,Capb,SCG,SCT having Belsil5512 and ecosmooth satin and polyquat 39 as conditioning agents shows high viscosity of around 25000 at lab scales but when scaled upto 50 kg batches the viscosity drops to around 14000.What could be the reason?

  David replied 7 years, 1 month ago 4 Members · 4 Replies
• 4 Replies

• 

  belassi

  Member

  March 31, 2017 at 4:58 am

  Is the large scale process in the same container material as the lab scale?

• 

  lopamudra

  Member

  March 31, 2017 at 8:00 am

  Yes the container material is same and should not have any impact as other batches taken give desired results.

• 

  Bill_Toge

  Member

  March 31, 2017 at 8:40 am

  which type of viscometer are you using, and what spindle and speed?

  also, is the SLES you’re using a dilution (28%), and is it the same batch as the one you used in the lab?

  depending on the nature of the product, the viscosity can be wildly variable with different batches of SLES

• 

  David

  Member

  March 31, 2017 at 11:52 am

  As @Bill_Toge  says - SLES 28% batches can really vary - from my experience usually corrected at the end of the process with salt.
  High shear + polymers like carbopol could also  lower the viscosity.

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