Soaps and Surfactants


Our roots are in soap. Soap noodles can be manufactured either through direct saponification of oils or through the fatty acid route. To-day most soap is manufactured through the fatty acid route. The advantages are, use of poor quality fat charge such as PFAD, crude oils, and better soap quality. Armaco is familiar with all saponification processes from pan boiling, soap lye separation processes such as divided pan unit (dpu) / rotating disc Contactor (rdc), fatty acid saponification in reactors - homoginisers / crutchers, to dry saponification. The quality of final soap is dependant on the quality of input blend. For oil route saponification, quality of bleaching and deodourisation, determines the final soap quality.

For fatty acids, the distillation must include a de-odourisation process and stills must be so designed that there is minimum entrainment of undistilled material in the final blend.


Sulphonation and Spray Drying

Through precise balancing of hot air blowers, spray nozzles, bag filters and cyclones, Armaco can deliver the maximum throughput per size of spray tower. Powder bulk density around point 0.33 or lower.

We can design reactors for sulphonation of LAB, AOS, SLS and SLES.


  • List of esteemed Clientele include P&G, Colgate, Reckitt Colemann, Godrej Soaps, Repi soaps, Sabuni Detergents, YCGSI and many more.
  • Achievements include enhancing performance of the spray dryers to run them at twice their capacities.
Single Column Soap Blend Distillation
Single Column Soap Blend Distillation

Distillation of Soap Blends

The distilled blend must be of good colour and most importantly free of odour. The process can be carried out either in a 2 column or single column set-up.

In a 2 column set up, a fractionation column precedes distillation. This is necessary when manufacturing a blend from a single feed such as palm stearin. C16 is partially removed in the first column to provide the required titre / IV, and the blend distilled in the second column. De-odourisation occurs in the first column.

Blends can also be economically distilled in a single column. Feed is introduced at column bottom, vapours rise through 2 beds to a top steam generator (refer fig). The entire condensate from the steam generator is refluxed back to the column, where it contacts rising vapours, which strip it of odiferous components. The distilled blend is then removed from a column side draw. The volatile cut exits from the vent condenser.

The de-odourisation can be enhanced by introducing live steam in the column bottom.


Soaps and Surfactants Toilet and Laundry Soap Detergent Sulphonation Detergent Spray Drying
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