Recovery of commercially valuable products from scrap tires
US5087436A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Jul 17, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Commercially valuable chemicals are extracted from tire-derived pyrolytic oils by subjecting the pyrolytic oils to a fractional distillation at a temperature of up to about 204.degree. C. under atmospheric pressure to isolate at least one commercially valuable chemical selected from the group consisting of paraffins, naphthenes, olefins and aromatics. Particularly valuable chemicals which can be extracted from tire-derived pyrolytic oils are benene, toluene, xylene, styrene and limonene-dl. The distillation fraction boiling above 204.degree. C. can be used as an extension oil in the manufacture of various rubber and plastic parts. Also disclosed is an improved process for producing carbon black by vacuum pyrolysis of used rubber tires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.