Process for producing light-weight oil from waste plastics containing phthalic polyester and/or polyvinyl chloride
US5841011A · kind A · utility
13Cited by
6References
20Claims
0Family size
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Key dates
| Filing date | Feb 6, 1997 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Feb 6, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/002
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Light-weight oil having a high octane number is produced from waste plastics containing phthalic polyester and/or polyvinyl chloride at a high yield without producing a phthalic sublimate or a carbonaceous residue by pyrolyzing the waste plastics in an atmosphere of steam or a steam/inert gas mixture. The resulting pyrolyzed oil and pyrolyzed gas may be catalytically cracked in an atmosphere of steam or a steam/inert gas mixture. Dechlorination may be performed before pyrolysis is carried out. Pyrolysis is preferably carried out in the presence of at least one of iron hydroxide, hydrous iron oxide and iron oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.