Abstract: A process for obtaining light olefins from a hydrocarbonaceous feedstock comprising a polymer recyclate, a polyol, a biomass composition, or a combination thereof. A process comprising contacting the hydrocarbonaceous feedstock with a small pore size zeolite catalyst in a reaction zone under pyrolysis conditions to produce a product stream comprising ethylene and/or propylene and aromatics. The hydrocarbonaceous feedstock is subjected to first pyrolysis conditions in a first reaction zone to produce a first reaction product. The first reaction product is then contacted with a small pore size zeolite catalyst in a second reaction zone under second pyrolysis conditions sufficient produce a second reaction product comprising ethylene and/or propylene and less than or equal to 8 wt % aromatics, based on the weight of the product stream. A hydrocarbonaceous waste stream is pretreated to produce the hydrocarbonaceous feedstock having a reduced content of contaminants harmful to zeolite catalysts.

Abstract: Methods of depolymerizing polyolefin-based material into useful petrochemical products using metal oxides and heat are described. The metal oxides improve the depolymerization reaction by decreasing the onset temperature for the depolymerization, which results in a higher depolymerization rate and a shorter residence time in the depolymerization unit, allowing for a predictable depolymerization reaction, and decreasing the branching or aromatic formations in the product.

Abstract: A method of depolymerizing plastics using a halloysite catalyst is described herein. The method reduces the energy required for the depolymerization process while achieving improved depolymerization results.

Abstract: Methods of depolymerizing polyolefin-based material into useful petrochemical products using metal oxides and heat are described. The metal oxides improve the depolymerization reaction by decreasing the onset temperature for the depolymerization, which results in a higher depolymerization rate and a shorter residence time in the depolymerization unit, allowing for a predictable depolymerization reaction, and decreasing the branching or aromatic formations in the product.

Abstract: A method of depolymerizing plastics using a halloysite catalyst is described herein. The method reduces the energy required for the depolymerization process while achieving improved depolymerization results.

Abstract: A method of depolymerizing plastics using a fluorinated alumina catalyst is described herein. The method reduces the energy required for the depolymerization process while achieving improved depolymerization results.