Use of waste cooking oil in the manufacture of soaps
This research was conducted with the aim of recover waste cooking oil and its subsequent transformation into soaps using two endothermic and exothermic processes. The oils in admixture had acceptable saponification values to be processed into soap. Soaps obtained had acceptable TFM, moisture and pH values and were comparable to the control soaps (Palmolive, Dove and Protex). The treatment A2B2C1 (Endothermic method + 15% NaOH + 12 h molding time) was considered the best of the treatments with 84.34% in performance and 5.47 cm2 in fat removal area analysis. The use of waste cooking oils could be an alternative in the manufacture of soap, reducing in part the environmental contamination.
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