Processes and systems for producing fuels and petrochemical feedstocks from a mixed plastics stream
AssigneeSaudi Arabian Oil Company
InventorOmer Refa Koseoglu
Life of this patent
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Abstract
Methods and systems for producing pyrolysis products from a mixed plastics stream are described herein. The method may include conducting pyrolysis of a plastic feedstock to produce a stream of plastic pyrolysis oil; feeding a catalytic cracking feed stream and a catalyst from a catalyst regenerator into a fluidized bed reactor, where the catalytic cracking feed stream comprises the plastic pyrolysis oil; cracking the catalytic cracking feed stream in the fluidized bed reactor to produce a product stream and a spent catalyst; and transporting the spent catalyst to the catalyst regenerator and regenerating the catalyst in the catalyst regenerator. The product stream comprises olefins having a carbon number of C2-C4 and distillate fuel.
Claims10
A system for processing mixed plastics into plastic pyrolysis products, the system comprising:
- an inlet stream comprising mixed plastics;
- a plastic pyrolysis unit, the plastic pyrolysis unit in fluid communication with the inlet stream, and operable to generate a stream of plastic pyrolysis oil from the inlet stream at a plastic pyrolysis oil outlet;
- a fluidized bed reactor comprising a catalyst inlet and a catalytic cracking feed stream inlet;
- a catalyst regenerator in fluidic communication with the catalyst inlet of the fluidized bed reactor;
- a catalyst that circulates from the catalyst regenerator to the fluidized bed reactor and back to the catalyst regenerator;
- and
- a catalytic cracking feed stream disposed in the fluidized bed reactor that reacts with the catalyst,
- where the catalytic cracking feed stream inlet is in fluid communication with the plastic pyrolysis oil outlet such that a catalytic cracking feed stream is disposed in the fluidized bed reactor that reacts with the catalyst to generate a product stream,
- where the catalytic cracking feed stream comprises the plastic pyrolysis oil, and
- where the plastic pyrolysis oil comprises a naphtha fraction representing hydrocarbons with boiling points from 36 to 180° C., a diesel fraction representing hydrocarbons with boiling points from 180 to 370° C., and a vacuum gas oil fraction representing hydrocarbons with boiling points greater than 370° C.
Dependencies are inferred from the claim text.