Systems and methods for recycling waste plastics are provided, including a system for recovering styrene monomer from waste polystyrene. The system includes a mixing, heating and compacting apparatus to receive a supply of waste polystyrene and to output a densified polystyrene containing melt; a pyrolysis reactor configured to receive the densified polystyrene containing melt and a supply of recycled oligomers, pyrolyze the densified polystyrene containing melt and the recycled oligomers, and output a hydrocarbon gas stream and a solids residue stream; a quenching apparatus configured to receive the hydrocarbon gas stream output from the pyrolysis reactor and condense out oligomers for routing upstream to the pyrolysis reactor to be combined as the supply of recycled oligomers with the densified polystyrene containing melt, and to discharge an altered hydrocarbon gas stream for further processing; and a condenser configured to receive the altered hydrocarbon gas stream from the quenching apparatus and condense out styrene to form a styrene monomer oil product.

There are provided recycled polystyrene polymers having a melt flow index of less than about 25 g/10 min. There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in p-cymene under conditions to obtain a polystyrene/p-cymene mixture, adding the polystyrene/p-cymene mixture to a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene and washing the precipitated polystyrene with additional portions of hydrocarbon polystyrene non-solvent under conditions to obtain twice-washed polystyrene. The twice-washed polystyrene can optionally be dried and formed into polystyrene pellets. There is also provided recycled polystyrene obtained from such processes for recycling polystyrene waste.

A synthetic mineral paper as substitute to cellulosic paper and a process for producing the same are provided.

The present invention relates to a process for the production of ethylene-based polymers from waste plastics feedstocks comprising the steps in this order of: (a) providing a hydrocarbon stream A obtained by hydrotreatment of a pyrolysis oil produced from a waste plastics feedstock; (b) optionally providing a hydrocarbon stream B; (c) supplying a feed C comprising a fraction of the hydrocarbon stream A and optionally a fraction of the hydrocarbon stream B to a thermal cracker furnace comprising cracking coil(s); (d) performing a thermal cracking operation in the presence of steam to obtain a cracked hydrocarbon stream D; (e) supplying the cracked hydrocarbon stream D to a separation unit; (f) performing a separation operation in the separation unit to obtain a product stream E comprising ethylene; (g) supplying the product stream E to a polymerisation reactor; and (h) performing a polymerisation reaction in the polymerisation reactor to obtain an ethylene-based polymer; wherein in step (d): .Math. the coil outlet temperature is 2: 800 and:::; 870 C., preferably 2: 820 and:::; 870 C.; and .Math. the weight ratio of steam to feed C is >0.3 and <0.8.

The present invention relates to a process for the production of ethylene-based polymers from waste plastics feedstocks comprising the steps in this order of: (a) providing a hydrocarbon stream A obtained by hydrotreatment of a pyrolysis oil produced from a waste plastics feedstock; (b) optionally providing a hydrocarbon stream B; (c) supplying a feed C comprising a fraction of the hydrocarbon stream A and optionally a fraction of the hydrocarbon stream B to a thermal cracker furnace comprising cracking coil(s); (d) performing a thermal cracking operation in the presence of steam to obtain a cracked hydrocarbon stream D; (e) supplying the cracked hydrocarbon stream D to a separation unit; (f) performing a separation operation in the separation unit to obtain a product stream E comprising ethylene; (g) supplying the product stream E to a polymerisation reactor; and (h) performing a polymerisation reaction in the polymerisation reactor to obtain an ethylene-based polymer; wherein in step (d): .Math. the coil outlet temperature is 2: 800 and:::; 870 C., preferably 2: 820 and:::; 870 C.; and .Math. the weight ratio of steam to feed C is >0.3 and <0.8.

Disclosed are methods and apparatus for recovering fibers from fiber reinforced polymers wherein the fiber reinforced polymer is contacted with a Lewis base for a time sufficient to allow at least partial depolymerization of the polymer.

Crumb rubber obtained from recycled tires is subjected to an interlinked substitution process. The process utilizes a reactive component that interferes with sulfur bonds. The resulting treated rubber exhibits properties similar to those of the virgin composite rubber structure prior to being granulated, and is suitable for use in fabricating new tires, engineered rubber articles, and asphalt rubber for use in waterproofing and paving applications.

Crumb rubber obtained from recycled tires is subjected to an interlinked substitution process. The process utilizes a reactive component that interferes with sulfur bonds. The resulting treated rubber exhibits properties similar to those of the virgin composite rubber structure prior to being granulated, and is suitable for use in fabricating new tires, engineered rubber articles, and asphalt rubber for use in waterproofing and paving applications.

A composite material may include at least one thermoplastic resin; and from 5 to 180 parts by weight of granular shive from hemp and/or flax, with respect to 100 parts by weight of the at least one thermoplastic resin, with particles having an average particle size lower than 0.2 millimeters (mm). A method for the manufacture of a composite material may include: melting the at least one thermoplastic resin; mixing the at least one molten resin with from 5 to 180 parts by weight, with respect to 100 parts by weight of the at least one thermoplastic resin, of granular shive from hemp and/or flax with an average particle size lower than 0.2 mm; and cooling the mixture obtained in order to form the composite material.

A composite material may include at least one thermoplastic resin; and from 5 to 180 parts by weight of granular shive from hemp and/or flax, with respect to 100 parts by weight of the at least one thermoplastic resin, with particles having an average particle size lower than 0.2 millimeters (mm). A method for the manufacture of a composite material may include: melting the at least one thermoplastic resin; mixing the at least one molten resin with from 5 to 180 parts by weight, with respect to 100 parts by weight of the at least one thermoplastic resin, of granular shive from hemp and/or flax with an average particle size lower than 0.2 mm; and cooling the mixture obtained in order to form the composite material.