Pyrolysis process for the production of a pyrolysis oil suitable for closed loop recycling, related apparatus, product and use thereof

Abstract

The present invention relates to the treatment of plastic materials to be used for chemical recycling processes for the enhancement of substantially plastic materials otherwise destined for disposal. Specifically, the invention relates to a process for the pyrolysis of substantially plastic material to obtain at least hydrocarbons that are liquid at 25° C., comprising the following steps: a) feeding a substantially plastic material to a pyrolysis reactor; b) bringing said material in said pyrolysis reactor to a temperature of between 330° C. and 580° C. in the substantial absence of oxygen and at a pressure of between atmospheric pressure and 13 bara; c) maintaining said material in said pyrolysis reactor for a sufficient amount of time to produce an effluent in the gaseous state; d) partially or fully condensing said effluent in the gaseous state, so as to form at least one fluid comprising hydrocarbons that are liquid at 25° C. and which quantitatively is at least 10% by mass with respect to the mass of substantially plastic material fed; e) carrying out an assessment of at least one property “Px” of the liquid condensed from said effluent in the gaseous state by means of at least one measurement “Ax” of the spectrum in transmission, reflection or transflexion on said condensed liquid; f) adjusting at least one process parameter “Ox” according to said assessment of at least one property “Px”; g) repeating steps e) and f) iteratively so as to keep the said at least one property “Px” substantially constant over time.

Dependencies are inferred from the claim text.