Patent US5099086A successfully refreshed from Google Patents.
US5099086A
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Extraction of commercially valuable chemicals from tire-derived pyrolytic oils
Assignee: Université Laval
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Filing: 1989-06-28
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Granted: 1992-03-24
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Expires: 2009-06-28
Abstract
Abstract Commerically 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 DEG 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 benzene, toluene, xylene, styrene and limonene-dl.
Inventors
- 👤 Christian Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:47
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
46 words
A distillation fraction boiling in the range of about 43° C. to about 204° C. under atmospheric pressure and obtained by fractional distillation of tire-derived pyrolytic oils, said fraction comprising limonene-dl in an amount greater than the individual amounts of other compounds present in said fraction.
Claim 2
Dependent Claim
46 words
A distillation fraction boiling in the range of about 43° C. to about 204° C. under atmospheric pressure and obtained by fractional distillation of tire-derived pyrolytic oils, said fraction comprising limonene-dl in an amount greater than the individual amounts of other compounds present in said fraction.
Claim 3
Dependent Claim
30 words
A distillation fraction as claimed in claim 1, containing about 25 weight % paraffins, about 7 weight % naphthenes, about 43 weight % olefins and about 25 weight % aromatics.
Claim 4
Dependent Claim
23 words
A distillation fraction as claimed in claim 1, boiling in the range of about 70° C. to about 204° C. under atmospheric pressure.
Claim 5
Dependent Claim
35 words
A distillation fraction as claimed in claim 3, containing about 3 weight % benzene, about 8 weight % toluene, about 7 weight % xylene, about 6 weight % styrene and about 17 weight % limonene-dl.
Claim 6
Dependent Claim
18 words
A distillation fraction as claimed in claim 1, having a calorific value of about 43,700 Jg -1 .
Claim 7
Dependent Claim
20 words
A distillation fraction as claimed in claim 1, wherein said pyrolytic oils are derived by vacuum pyrolysis of rubber tires.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |