Air-treated propane-precipitated asphalt

Details Air-treated propane-precipitated asphalt Air-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

042832306

ABSTRACT:
Propane-precipitated asphalt is contacted with a stream of air at 200.degree. C. and above to increase the softening point of the asphalt. The resulting asphalt base, having a softening point of about 65.degree.-300.degree. C., is then blended with 5-60 weight percent liquid sulfur-treated petroleum fraction, having an equivalent atmospheric boiling point range of 370.degree.-500.degree. C., to yield paving grade quality asphalt cement composition.

REFERENCES:
patent: 3317447 (1967-05-01), Black et al.
patent: 3793189 (1974-02-01), Corbett
patent: 3960585 (1976-06-01), Gaw
patent: 3977891 (1976-08-01), Bertrand
patent: 4024076 (1977-05-01), Miyake et al.
patent: 4139397 (1979-02-01), Yan
Hydrocarbon Processing, vol. 58, pp. 173-177, Apr. 1979.
Distribution and Reactions of Sulfur in "Asphalt During Air Blowing and Sulfurizing Process" I & EC Product Research and Development, vol. 4, No. 1, pp. 51-57, Mar. 1965.

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