Abstract: The present disclosure relates to methods of removing brominated contaminants from polystyrene waste and recovering the brominated contaminants. The present disclosure further relates to methods of recycling polystyrene waste, wherein the recycling comprises retention of brominated contaminants or removal of contaminants. The present disclosure also relates to use of monocyclic aromatic benzenic solvents in the removal and/or recovery of brominated contaminants from polystyrene waste and in the recycling of polystyrene waste. Moreover, the present disclosure relates to use of the recovered brominated contaminants in the manufacture of polystyrene products such as insulation.

Abstract: 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.

Abstract: The present disclosure relates to methods of removing brominated contaminants from polystyrene waste and recovering the brominated contaminants. The present disclosure further relates to methods of recycling polystyrene waste, wherein the recycling comprises retention of brominated contaminants or removal of contaminants. The present disclosure also relates to use of monocyclic aromatic benzenic solvents in the removal and/or recovery of brominated contaminants from polystyrene waste and in the recycling of polystyrene waste. Moreover, the present disclosure relates to use of the recovered brominated contaminants in the manufacture of polystyrene products such as insulation.

Abstract: There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in ethylbenzene under conditions to obtain a polystyrene/ethylbenzene mixture, adding the polystyrene/ethyl benzene 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.

Abstract: There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise the use of a reducing agent.

Abstract: There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise the use of a reducing agent.

Abstract: There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in ethylbenzene under conditions to obtain a polystyrene/ethylbenzene mixture, adding the polystyrene/ethyl benzene 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.

Abstract: There is provided a composition for the production of a recycled polystyrene. The composition comprises polystyrene, ethylbenzene and a non-solvent having a boiling point at 1 atm of pressure of from 98° C. to 110° C. There is also provided a method of using ethylbenzene and a non-solvent having a boiling point at 1 atm of pressure of from 98° C. to 110° C. The method comprises mixing together the ethylbenzene, the non-solvent and polystyrene for recycling the polystyrene.

Abstract: 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.

Abstract: There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise the use of a reducing agent.

Abstract: 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.

Abstract: 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.

Abstract: There are provided processes for recycling waste such as polystyrene thermoplastic polymer waste and/or polystyrene thermoplastic copolymer waste as well as recycled polystyrene thermoplastic polymer and/or recycled thermoplastic copolymer that may, for example, be obtained from such processes. The processes can comprise dissolving the waste in cymene, xylene or ethylbenzene or a suitable solvent, to obtain a mixture followed by heating the mixture under acidic conditions and then optionally neutral conditions in the presence of a reducing agent then cooling to obtain a supernatant comprising polystyrene thermoplastic polymer and/or polystyrene thermoplastic copolymer and a solid waste residue.

Abstract: There is provided a composition for the production of a recycled polystyrene. The composition comprises polystyrene, ethylbenzene and a non-solvent having a boiling point at 1 atm of pressure of from 98° C. to 110° C. There is also provided a method of using ethylbenzene and a non-solvent having a boiling point at 1 atm of pressure of from 98° C. to 110° C. The method comprises mixing together the ethylbenzene, the non-solvent and polystyrene for recycling the polystyrene.

Abstract: Processes for recycling polystyrene waste. The processes can comprise dissolving the polystyrene waste in ethylbenzene under conditions to obtain a polystyrene/ethylbenzene mixture, adding the polystyrene/ethylbenzene 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.

Abstract: There are provided processes for recycling polystyrene waste. The processes can comprise dissolving said polystyrene waste in ethylbenzene under conditions to obtain a polystyrene/ethylbenzene mixture, adding the polystyrene/ethylbenzene 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.

Abstract: 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.