Process and apparatus for recovering polymer oil from drag stream
AssigneeUop LLC
InventorsNickolas Kapaun, Dennis Robert Ladendorf
Life of this patent
Estimating the term…
Abstract
Process and apparatus for recovering a product stream from a waste plastic feedstock and reducing the endpoint of the product stream is provided. A polymer oil is produced as a product stream by pyrolyzing the waste plastic feedstock in a pyrolysis reactor to produce a pyrolysis vapor and passing the pyrolysis vapor to a condenser. A drag stream from the pyrolysis reactor is further pyrolyzed to convert the polymer oil to pyrolysis oil which is vaporized under pyrolysis conditions to vaporous pyrolysis oil and dry char. Vaporous pyrolysis oil is recovered to enhance conversion and fed to a condenser using a liquid jet ejector.
Claims19
A process for recovering a product pyrolysis oil stream from a waste plastic feedstock comprising:
- pyrolyzing the waste plastic feedstock in a pyrolysis reactor to produce a pyrolysis vapor stream and a drag stream comprising char in a polymer oil;
- and
- pyrolyzing the drag stream to convert the polymer oil to provide a drag pyrolysis vapor stream and dried char.
An apparatus comprising:
- a pyrolysis reactor to produce a pyrolysis vapor stream and a drag stream;
- a drag pyrolysis reactor in downstream communication with a drag line extending from a bottom of said pyrolysis reactor;
- and a condenser in downstream communication with said drag pyrolysis reactor wherein the drag pyrolysis reactor is a rotary calciner having a rotating shell.
A process for recovering a pyrolysis oil stream from a waste plastic feedstock comprising:
- pyrolyzing the waste plastic feedstock in a pyrolysis reactor to produce a pyrolysis vapor stream and a drag stream comprising char in polymer oil;
- pyrolyzing the drag stream to convert the polymer oil to provide a drag pyrolysis vapor stream and dried char;
- and
- condensing the pyrolysis vapor stream and the drag pyrolysis vapor stream to provide a liquid pyrolysis oil stream.
Dependencies are inferred from the claim text.