Plastic recycling process
OwnerAlberto MARTINEZ JOARISTI, Ana Lilia MOTA SALINAS +1inventors
InventorsAlberto MARTINEZ JOARISTI, Ana Lilia MOTA SALINAS, Elisa VASKIKARI
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Abstract
A process for the treatment of a mixed plastic waste comprising: (I) pyrolyzing a mixed plastic waste in a pyrolysis reactor at a temperature of 250 to 700° C. and a pressure of 1.0 to 100 bar to form a pyoil; (II) directly transferring the pyoil to a hydrotreatment unit, optionally via a filter, and subjecting said pyoil to hydrotreatment with a catalyst in the presence of hydrogen at a temperature of 250 to 700° C. and a pressure of 1.0 to 100 bar to form a hydrotreated pyoil; (III) recycling a portion of the hydrotreated pyoil directly from the hydrotreatment unit to the pyrolysis reactor.
Claims18
A process for the treatment of a mixed plastic waste comprising:
- (I) pyrolyzing a mixed plastic waste in a pyrolysis reactor at a temperature of 250 to 700° C. and a pressure of 1.0 to 100 bar to form a pyoil;
- (II) directly transferring the pyoil to a hydrotreatment unit, optionally via a filter, and subjecting said pyoil to hydrotreatment with a catalyst in the presence of hydrogen at a temperature of 250 to 700° C. and a pressure of 1.0 to 100 bar to form a hydrotreated pyoil;
- (III) recycling a portion of the hydrotreated pyoil directly from the hydrotreatment unit to the pyrolysis reactor.
A process for the treatment of a mixed plastic waste comprising:
- (I) suppling a pyrolysis reactor with a feed comprising a mixed plastic waste;
- (II) pyrolyzing said feed comprising the mixed plastic waste in the pyrolysis reactor at a temperature of 250 to 700° C. and a pressure of 1.0 to 100 bar to form a pyoil;
- (III) directly transferring the pyoil to a hydrotreatment unit, optionally via a filter, and subjecting said pyoil to hydrotreatment with a catalyst in the presence of hydrogen at a temperature of 250 to 700° C. and a pressure of 1.0 to 100 bar to form a hydrotreated pyoil;
- (IV) recycling a portion of the hydrotreated pyoil directly from the hydrotreatment unit to the pyrolysis reactor wherein the weight ratio of the hydrotreated pyoil recycled to the pyrolysis reactor to the mixed plastic waste fed to the pyrolysis reactor is from 10:1 to 1:1, preferably 3:1 to 5:1.
An apparatus for the treatment of a mixed plastic waste comprising:
- (I) a pyrolysis reactor;
- (II) a hydrotreatment unit;
- (III) a recycle conduit directly connecting the hydrotreatment unit to the pyrolysis reactor;
- wherein the pyrolysis reactor is directly connected to the hydrotreatment unit via a conduit, said conduit may optionally comprise a filter.
Dependencies are inferred from the claim text.