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公开(公告)号：US11407877B2
公开(公告)日：2022-08-09
申请号：US17288896
申请日：2019-10-25
申请人： POLYSTYVERT INC.
发明人： Roland Côté
摘要： 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. The supernatant can optionally be treated with a filtration aid, then the supernatant can be contacted with a hydrocarbon polystyrene non-solvent under conditions to obtain precipitated polystyrene thermoplastic polymer and/or precipitated polystyrene thermoplastic copolymer which can be washed with additional hydrocarbon polystyrene non-solvent, and optionally dried and formed into polystyrene thermoplastic polymer pellets and/or polystyrene thermoplastic copolymer pellets.
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公开(公告)号：US12018132B2
公开(公告)日：2024-06-25
申请号：US17857031
申请日：2022-07-03
申请人： POLYSTYVERT INC.
发明人： Roland Côté
CPC分类号： C08J11/08 , B29B17/02 , B29B2017/0224 , B29B2017/0231 , B29B2017/0293 , C08J2323/06 , C08J2325/06 , C08J2355/02
摘要： 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.
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公开(公告)号：US11407878B2
公开(公告)日：2022-08-09
申请号：US17353395
申请日：2021-06-21
申请人： POLYSTYVERT INC.
发明人： Roland Côté
摘要： 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.
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公开(公告)号：US11680149B2
公开(公告)日：2023-06-20
申请号：US17184593
申请日：2021-02-25
申请人： POLYSTYVERT INC.
发明人： Roland Côté
CPC分类号： C08J11/08 , B29B17/02 , B29B2017/0293 , C08J2325/06
摘要： 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.
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公开(公告)号：US10961367B2
公开(公告)日：2021-03-30
申请号：US16765506
申请日：2018-11-20
申请人： POLYSTYVERT INC.
发明人： Roland Côté
摘要： 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.
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