In a single step, carry out an equilibrium reaction while simultaneously concentrating the reaction product and discharging a solid or a slurry.

Equilibrium reactions, such as saponification and esterification are typically carried out in batch reactors, taking 24 to 30 hours to reach the desired conversion. furthermore, it has been demonstrated that rapid removal of reaction by-products, such as water in esterification reactions, significantly reduces reaction time. However, both heat and mass transfer rates are limited in batch reactors. Consequently, as the reaction proceeds toward completion, the water removal rate drops dramatically, inhibiting the reaction rate and wasting valuable reactor time.

Use an Artisan two-zone Rototherm^® to carry out continuous equilibrium reactions. A co-current design, along with a two-zone process section, permits reaction, concentration, and a heavy slurry or solid discharge in a single step.

This mechanically-agitated thin film processor provides a unique combination of efficient heat and mass transfer capability, short residence time, and mechanical integrity to perform continuous reactions of highly viscous, foaming, fouling and solids-containing products. The rapid evaporation of reaction by-product(s) enables near complete conversion of most saponification and esterification reactions in minutes, yielding superior products, while minimizing energy consumption.

• Single stage saponification of isostearic acid with sodium hydroxide, forming a stoichiometric soap.
• Steam stripping the "unsaps" from the soap.
• Discharging a paste-purified soap with an acid value of 195, and an unsap value <1.

Learn more about the Artisan Rototherm^® or fill out an information request form to receive a Rototherm^® brochure or a free Process Solutions Handbook on novel chemical manufacturing approaches.