Catalytic pyrolysis of polystyrene into aromatic rich liquid product using spherical catalyst
US11613623B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2021 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | Sep 21, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a process of catalytic depolymerization of polystyrene involving a spherical catalyst, an apparatus for carrying out the depolymerization, recovering the aromatic rich liquid product and recycling the catalyst without any decrease in the catalytic performance. Further, the present invention provides that the aromatic rich liquid product includes styrene, xylene, benzene, ethyl benzene, with styrene content greater than 65%. Additionally, the catalyst involved in the depolymerization process is a spherical catalyst that is easily recovered from coke/char formed during the process and is recycled and reused without any decrease in the catalytic performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.