Method of reducing fumes from a vessel of molten asphalt

Details Method of reducing fumes from a vessel of molten asphalt Method of reducing fumes from a vessel of molten asphalt

1999-03-12

2000-10-10

Szekely, Peter A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 59, 524 70, 524 71, 2065247, 206525, 428 357, 428 368, 428489, C08L 9500, B32B 1100

Patent

active

061302767

ABSTRACT:
In a method of melting asphalt in a vessel, the molten asphalt normally emitting fumes, 0.2 weight percent to 6 weight percent of a polymer is added to the asphalt to reduce the visual opacity of the fumes by at least 25% over the same asphalt without the polymer. In another embodiment, the total emissions of benzene soluble suspended particulates is reduced by at least 15% over the same asphalt without the polymer. Preferably, the added polymer has a melt flow index of from 15 grams/10 minutes to 95 grams/10 minutes, and the added polymer reduces the visual opacity of the fumes by forming a skim on the upper surface of the molten asphalt.

REFERENCES:
patent: 5452800 (1995-09-01), Muir
patent: 5733616 (1998-03-01), Zenicki et al.

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