Method for recycling a plastic
OwnerSwaminathan Rameshinventor
Life of this patent
Estimating the term…
Abstract
A method of recycling a plastic includes decomposing the plastic in the presence of a catalyst to form hydrocarbons. The catalyst includes a porous support having an exterior surface and defining at least one pore therein. The catalyst also includes a depolymerization catalyst component disposed on the exterior surface of the porous support for depolymerizing the plastic. The depolymerization catalyst component includes a Ziegler-Natta catalyst, a Group IIA oxide catalyst, or a combination thereof. The catalyst further includes a reducing catalyst component disposed in the at least one pore.
Claims15
A method of recycling a plastic chosen from polyethylene, polypropylene, polystyrene, and combinations thereof, said method comprising:
- decomposing the plastic in the presence of a catalyst to form hydrocarbons and reducing the hydrocarbons in the presence of a reducing agent that is different from the catalyst,
- wherein the catalyst comprises a porous support having an exterior surface and at least one pore therein, a depolymerization catalyst component comprising a metallocene catalyst disposed on the exterior surface of the porous support, and a reducing catalyst component disposed in the at least one pore;
- wherein the exterior surface of the porous support comprises less than 10 parts by weight of the reducing catalyst component based on 100 parts by weight of the depolymerization catalyst component as determined using Energy Dispersive X-Ray Spectroscopy (EDS),
- wherein the reducing catalyst component comprises a transition metal selected from the group of iron, nickel, palladium, platinum, and combinations thereof, and
- wherein the at least one pore in the porous support has an average pore size of 10 Angstroms.
Dependencies are inferred from the claim text.