Method for recovering styrene monomer from polystyrene resin by using a catalyst
US6380448B1 · kind B1 · utility
2Cited by
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4Claims
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Key dates
| Filing date | Jun 8, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jun 8, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2527/055
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method for recovering styrene monomers from polystyrene resins by using sulfate as a catalyst. The present invention makes possible to thermally decompose polystyrene resins at comparatively low temperatures, and to reduce facility costs, etc., and also makes possible to recover oil containing less ratio of low molecular weight components and a high content of styrene monomers from vapors obtained through thermal decomposition of polystyrene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.