Sulfur-treated propane-precipitated asphalt

Details Sulfur-treated propane-precipitated asphalt Sulfur-treated propane-precipitated asphalt

1980-01-10

1981-08-11

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

106278, 106281R, 208 44, 427138, C08L 9500

Patent

active

042832314

ABSTRACT:
Propane-precipitated asphalt is heated with 1-15 wt. % elemental sulfur at 140.degree. to 300.degree. C. until hydrogen sulfide evolution ceases. The sulfur-treated asphalt base material having an increased softening point of about 65.degree.-300.degree. C., is blended with 5-60 wt. % liquid petroleum fraction, such as vacuum gas oil or extract oil, having an equivalent atmospheric boiling point of 370.degree.-500.degree. C., to yield a quality paving grade asphalt cement composition meeting ASTM standards.

REFERENCES:
patent: 3317447 (1967-05-01), Black et al.
patent: 3793189 (1974-02-01), Corbett
patent: 3960585 (1976-05-01), Gaw
Hydrocarbon Processing, vol. 58, pp. 173-174, 4/1979.
"Distribution & Reactions of Sulfur in Asphalt During Air Blowing & Sulfurizing Process," I & EC Product Research & Development, vol. 4, No. 1, pp. 51-57, 3/1965.
"Viscosity Characterization of Asphalt Cement," L. W. Corbett & H. E. Schweger, ASTM, pp. 40-49, 1973.

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