Purification of recycled and renewable organic material

A method of purifying a recycled or renewable organic material, having more than 1 ppm silicon as silicon compounds and/or more than 10 ppm phosphorous as phosphorous compounds, the method comprising:

• (a) providing a feed of the recycled or renewable organic material, wherein the recycled or renewable organic material is selected from a group consisting of plant based fats and oils, animal based fats and oils, fossil waste-based oils, waste oils, algal oils and microbial oils;
• (b) optionally pre heat treating the recycled or renewable organic material at 180 to 325° C. and optionally adding acid before or after the heat treatment process and optionally filtering the pre heat treated recycled or renewable organic material;
• (c) heat treating the recycled or renewable organic material in a presence of an adsorbent selected from silica-based adsorbents at 180 to 325° C. and filtering the heat treated recycled or renewable organic material, and optionally adding acid before or after the heat treatment process;
• (d) optionally blending the heat treated recycled or renewable organic material with a hydrocarbon or lipid-based stream;
• (e) optionally evaporating the volatile silicon compounds from the heat treated recycled or renewable organic material;
• and
• (f) hydrotreating the heat treated recycled or renewable organic material in a presence of a hydrotreating catalyst;
• to obtain purified hydrotreated recycled or renewable organic material selected to contain at least one or more of less than 20%, or less than 10%, or less than 5%, of the original silicon content of the recycled or renewable organic material provided in step (a) and/or less than 30% of the original phosphorous content of the recycled or renewable organic material provided in step (a).