Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Patent
1997-04-17
1999-03-30
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
C08J 1104
Patent
active
058890637
ABSTRACT:
Tires are converted to rubber particles and inorganic compounds are removed from the tires by treating the tires in a closed reactor with a nitric acid solution having a nitric acid concentration above 60%. In the preferred embodiment, any steel belts contained in the tires are first removed. The tires are then treated with a solution of concentrated nitric acid in which the acid concentration is maintained above 60% which extracts inorganic compounds such as zinc, sulfur and calcium from the tires and converts the tires into rubber particles.
REFERENCES:
patent: 4182677 (1980-01-01), Bocard
Bauman, Bernard D., "High-Value Engineering Materials from Scrap Rubber", Rubber World, May 1995, pp. 30-33.
Tsaikova, S., et al., "Oxidation of Scarp Tire Vulcanizates by Nitric Acid", Journal of Applied Chemistry of the USSR, May 1986, pp. 2409-2411.
Cummings, Ricky C., et al., X-ray Characterization of Tire Derived Particles Resulting From Different Solvents, American Chemical Society, Division of Fuel Chemistry, vol. 40, No. 4, Aug. 1995. pp. 879-883.
Michl Paul R.
University of Southern Mississippi
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