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

C - Chemistry, Metallurgy

10

C

C10C 3/02 (2006.01) C10C 3/10 (2006.01)

Patent

CA 2361337

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.

A un asphalte en fusion (24) contenu dans un récipient (10) et émettant normalement des fumées, on ajoute de 0,2 à 6 % en poids d'un polymère de manière à réduire l'opacité visuelle de ces fumées d'au moins 25 % par rapport à un asphalte sans adjonction de polymère. Selon un autre mode de réalisation, les émissions totales de particules solubles de benzène en suspension sont réduites d'au moins 15 % par rapport au même asphalte sans polymère. Le polymère ajouté doit de préférence présenter un indice de fluidité compris entre 15 grammes/10 minutes et 95 grammes/10 minutes. Ce polymère ajouté forme sur la surface de l'asphalte en fusion une écume qui atténue l'opacité visuelle des fumées.

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