From Silverson Machines, Inc.
Surfactants such as Sodium Laureth Sulphate (SLES) are widely used in shampoo, bubble bath, liquid detergent and other cleansing products, and are traditionally supplied and used at a concentration of 25-28%. "High active" surfactants with a concentration of 65-70% are also available offering economies in transport and storage costs. They are also more resistant to microbiological attack and contain fewer impurities.
Dilution is best carried out using a high shear In-Line mixer.A Silverson In-Line mixer can be used as illustrated in figure 1 below. Water is charged into the vessel and recirculated by the self-pumping Silverson In-Line mixer. The High Active Surfactant is pumped into the water stream immediately prior to the In-Line mixer. The mixer's rotor/stator workhead ensures a uniform mix which is then recirculated back into the vessel.
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