Reducing H.sub.2 S-emission from hot cast sulfur-asphalt mixture

Details Reducing H.sub.2 S-emission from hot cast sulfur-asphalt mixture Reducing H.sub.2 S-emission from hot cast sulfur-asphalt mixture

1974-12-04

1976-06-01

Welcome, Joan E.

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

106275, 106287SC, 208 22, 208 44, 264212, 264330, 404 17, 404 32, 404 79, C08L 9500, E01C 700

Patent

active

039605850

ABSTRACT:
When cast sulfur-asphalt compositions, e.g., sulfur-asphalt-aggregate pavements and construction articles, are being prepared by mixing and/or heating mixtures comprising sulfur and asphalt at elevated temperatures not exceeding 175.degree.C, the evolution of hydrogen sulfide is substantially reduced by carrying out the mixing and/or heating step in the presence of a hydrogen sulfide suppressant selected from the class consisting of free radical inhibitors and redox (oxidation-reduction) catalysts.

REFERENCES:
patent: 491395 (1893-02-01), Wray
patent: 3738853 (1973-06-01), Kopvillem et al.
patent: 3803066 (1974-04-01), Petrossi
patent: 3810857 (1974-05-01), Garrigues et al.

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