Process for co-recycling tires and oils
AssigneesUniv. of Wyoming, Amoco Corporation
InventorsChang Y. Cha, Henry Plancher, Lawrence S. Kraus
Life of this patent
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Abstract
A thermal process co-recycles tires with oils to produce gases, liquids and solids. The latter consisting of glass and steel fibers and a carbonous residue which are separately segregated and collected. By using selected additives gas formation and hydrogen sulfide contents are reduced, light product oil yields and quality are maximized and the level of chlorinated substances in the oils are reduced to trace amounts. The carbonous residue makes an excellent modifier for improving performance properties of bituminous binders and bituminous mixtures and for providing added benefits to properties of Portland concrete.
Claims15
A bituminous binder composition of matter comprising:
- blending asphalt;
- carbonous residue, produced by the steps comprising:
- (1) digesting at a maximum temperature below about 750.degree. F. waste tires using oil being selected from the group comprising residuum, new 600w cylinder oil, waste motor oil, trim gas oil, vacuum heavy bottoms, decanted oil, and combinations thereof;
- (2) mixing at least one additive, being selected from the group consisting of calcium carbonate, calcium hydroxide, calcium oxide, magnesium carbonate, magnesium oxide, magnesium hydroxide, dolomite, sodium carbonate, sodium hydroxide, potassium carbonate, potassium hydroxide, iron oxide, bauxite, red mud, and combinations thereof;
- (3) retorting at a maximum temperature below about 875.degree. F. to remove light components while retaining said carbonous residue;
- and wherein said carbonous residue is within the range of about five to ten weight percent of said binder;
- and
- at least one additional additive selected from the group comprising calcium oxide, calcium hydroxide, magnesium oxide, magnesium hydroxide, and combinations thereof, wherein all total additives are within the range of about up to about three weight percent of said binder.
Dependencies are inferred from the claim text.