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1. 发明公开

US20230303798A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE 审中-公开
公开(公告)号：US20230303798A1
公开(公告)日：2023-09-28
申请号：US18144924
申请日：2023-05-09
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , B29B17/02
CPC分类号： C08J11/08 , B29B17/02 , B29B2017/0293 , C08J2325/06
摘要： 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.

2. 发明申请

US20220073696A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE 有权
公开(公告)号：US20220073696A1
公开(公告)日：2022-03-10
申请号：US17353395
申请日：2021-06-21
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , B29B17/02 , C08F112/08 , C08L25/06
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.

3. 发明申请

US20230002583A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE 有权
公开(公告)号：US20230002583A1
公开(公告)日：2023-01-05
申请号：US17857028
申请日：2022-07-03
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , B29B17/02 , C08F112/08 , C08L25/06
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.

4. 发明申请

US20200317884A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE 审中-公开
公开(公告)号：US20200317884A1
公开(公告)日：2020-10-08
申请号：US16765506
申请日：2018-11-20
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , B29B17/02
摘要： 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.

5. 发明申请

US20210179802A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE 有权
公开(公告)号：US20210179802A1
公开(公告)日：2021-06-17
申请号：US17184593
申请日：2021-02-25
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , B29B17/02
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.

6. 发明申请

US20200165407A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE 审中-公开
公开(公告)号：US20200165407A1
公开(公告)日：2020-05-28
申请号：US16699386
申请日：2019-11-29
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , C08L25/06 , C08F112/08 , B29B17/02
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.

7. 发明申请

US20170298207A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE 审中-公开
公开(公告)号：US20170298207A1
公开(公告)日：2017-10-19
申请号：US15515817
申请日：2015-10-05
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , B29B17/02 , C08F112/08 , C08L25/06 , C08L25/00 , C08J11/00
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.

8. 发明公开

US20240294723A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE AND/OR POLYSTYRENE COPOLYMER WASTE 审中-公开
公开(公告)号：US20240294723A1
公开(公告)日：2024-09-05
申请号：US18664293
申请日：2024-05-15
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , B29B17/02
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.

9. 发明申请

US20220348734A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE AND/OR POLYSTYRENE COPOLYMER WASTE 有权
公开(公告)号：US20220348734A1
公开(公告)日：2022-11-03
申请号：US17857031
申请日：2022-07-03
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , B29B17/02
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.

10. 发明申请

US20210380777A1 PROCESSES FOR RECYCLING POLYSTYRENE WASTE AND/OR POLYSTYRENE COPOLYMER WASTE 有权
公开(公告)号：US20210380777A1
公开(公告)日：2021-12-09
申请号：US17288896
申请日：2019-10-25
申请人： POLYSTYVERT INC.
发明人： Roland CÔTÉ
IPC分类号： C08J11/08 , B29B17/02
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 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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