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US 12,404,457 B2Granted
Process for purifying pyrolyzed plastic waste
AssigneeBorealis AG
InventorsTuomas Ouni, Kilian Piettre, Ammar Abdull Makic
Life of this patent
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Abstract
The present invention relates to a process for purifying a pyrolyzed plastic waste, the process comprising the steps of providing the pyrolyzed plastic waste, wherein the pyrolyzed plastic waste is a liquid or a wax at 20° C. and 1 atm, contacting the pyrolyzed plastic waste with activated carbon yielding a pretreated 5 plastic waste and hydrogenating the pretreated plastic waste using hydrogen and a metal-based catalyst yielding a hydrogenated plastic waste suitable for steam cracking.
Claims15
A process for purifying a pyrolyzed plastic waste, the process comprising the steps of:
- a) providing the pyrolyzed plastic waste, wherein the pyrolyzed plastic waste is a liquid or a wax at 20° C. and 1 atm;
- b) contacting the pyrolyzed plastic waste with activated carbon yielding a pretreated plastic waste, wherein step b) is carried out in a first vessel and step b) is carried out at a temperature in the range of from 5° C. to 100° C.;
- c) hydrogenating the pretreated plastic waste using hydrogen and a metal-based catalyst yielding a hydrogenated plastic waste, wherein step c) is carried out in a second vessel.
Dependencies are inferred from the claim text.