Processing petroleum-derived materials

A method, comprising:

• (a) contacting a plurality of petroleum-derived materials that comprise plastic in the form of a seal, wire or cable jacket, floor covering, filter, vehicle part, or any combination thereof with a lipid composition comprising fatty acid moieties, wherein from about 9 wt % to about 40 wt % of the fatty acid moieties are saturated, and wherein at least about 0.5 wt % of the fatty acid moieties are monounsaturated;
• and
• (b) combining the mixture resulting from step (a) with a composition comprising plastic packaging to produce an agglomerate.

An apparatus for producing an extrudate from petroleum-derived materials, comprising:

• (a) a pre-extrusion mixer for contacting a plurality of petroleum-derived materials with a lipid composition comprising fatty acid moieties and a filler to produce a composite, having one or more inlets for receiving the petroleum-derived materials, the lipid composition, and the filler, and an outlet for discharging the composite;
• and
• (b) an extruder in fluid communication with the outlet of the pre-extrusion mixer.