Recovery of commercially valuable products from scrap tires

Details Recovery of commercially valuable products from scrap tires Recovery of commercially valuable products from scrap tires

1991-11-04

1993-07-20

Pal, Asok

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423446, 585241, C09C 148

Patent

active

052290999

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 benzene, 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.

REFERENCES:
patent: 4284616 (1981-08-01), Solbakken et al.
patent: 4686008 (1987-08-01), Gibson
patent: 4740270 (1988-04-01), Roy
patent: 5087436 (1992-02-01), Roy
patent: 5099086 (1992-03-01), Roy
L. J. Ricci, "Spent Tire Pyrolysis may add Bonnie to Recycling" Chemical Engineering, Aug. 2, 1976, p. 52.

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