The present study aims to produce a cosmetic emulsion containing the co-product glycerine, generated in the production of biodiesel by the transesterification of canola oil. The first part of the work consisted in the production of biodiesel by the transesterification of crude canola oil, using potassium hydroxide as catalyst, with a molar ratio of oil:methanol (1:6) and a temperature of 25 °C. The final reaction mixture had to be washed and filtered to obtain biodiesel, which was characterized and considered within the specifications of the National Oil Agency (ANP). The second step was based on the pre-purification of the glycerine by acid hydrolysis, by the addition of concentrated phosphoric acid/crude glycerin in the 2:3 molar ratio. This step was important to remove impurities such as the catalyst and fatty acids to later use the glycerine in the manipulation of the cream. Finally, the formulations of the Lanette® cream were made, one with the pharmaceutical glycerine other for the pre-purified glycerine of the biodiesel, and comparative tests were made among them, which proved the viability of the pre-purification of the residual glycerine of the biodiesel.
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