Process for the preparation of plant extracts for treating skin disorders and enhancing healing of wounds

A process for preparing a Plectranthus amboinicus extract comprising the steps of:

• a) contacting dried Plectranthus amboinicus leaves with 95% ethanol to obtain a Plectranthus amboinicus crude extract;
• b) concentrating the Plectranthus amboinicus crude extract;
• c) treating the concentrated Plectranthus amboinicus crude extract with a stirring separation method to obtain Plectranthus amboinicus extract, wherein the Plectranthus amboinicus extract is obtained without using column chromatography, and wherein the stirring separation method comprises the steps of:
• (i) diluting the concentrated Plectranthus amboinicus crude extract with a high-polarity solvent to obtain a diluted extract, and stirring and dipping the diluted extract with a non-polar copolymer styrene-divynilbenzene adsorbent resin;
• (ii) extracting the resin of (i) with distilled water and collecting a first extract;
• (iii) further extracting the resin of (ii) with a sub-high-polarity solvent and collecting a second extract;
• (iv) further extracting the resin of (iii) with a medium-polarity solvent and collecting a third extract;
• and
• (v) further extracting the resin of (iv) with a low-polarity solvent and collecting a fourth extract;
• and
• d) obtaining the Plectranthus amboinicus extract, wherein the Plectranthus amboinicus extract contains one or more extracts selected from the first, second, third and fourth extracts.