PURIFICATION OF RECYCLED AND RENEWABLE ORGANIC MATERIAL

Abstract

Herein is provided a method for purifying a recycled or renewable organic material, wherein the recycled or renewable organic material comprises one or more impurities selected from a group consisting of silicon, phosphorus, Cl and sterol compounds, comprising the steps of (a) providing the recycled or renewable organic material; (b) optionally pretreating the recycled or renewable organic material at a temperature from 180 to 325°C, and optionally adding acid before or after the thermal pretreatment process, and optionally filtering the thermally pretreated recycled or renewable organic material after the thermal pretreatment;(c) heat-treating the recycled or renewable organic material at temperatures from 100 to 450°C, optionally in the presence of an adsorbent, optionally adding water before or during the heat treatment process and optionally adding acid before or after the heat treatment process, and optionally filtering the heat-treated recycled or renewable organic material after the heat treatment; (d) optionally evaporating volatile silicon compounds from the heat-treated recycled or renewable organic material compounds, thereby reducing the silicon content of the heat-treated recycled or renewable organic material;(e) optionally thermally cracking the recycled or renewable organic material, thereby reducing the oxygen and phosphorus content of the thermally treated recycled or renewable organic material, and optionally removing volatile compounds from the thermally cracked recycled or renewable organic material, and optionally removing solids / precipitates from the recycled or renewable organic material; and (f) hydrotreating the thermally treated recycled or renewable organic material in the presence of a hydrotreating catalyst; to obtain purified hydrotreated recycled or renewable organic material.