Aspects of the present invention provide methods of drying lecithin in a batch reaction, comprising the steps of obtaining lecithin-containing material (derived from a crude refining stream) comprising 15-50% water, 10-30% acetone insoluble matter, and 10-20% free fatty acid; adding a fatty acid source (also derived from a crude refining stream) to the lecithin-containing material composition to obtain a lecithin/fatty acid reaction mixture; and blowing dry gas through the gum/fatty acid reaction miture to obtain a resultant dried lecithin fatty acid blend having a water content of less than 2%. The resultant dried lecithin fatty acid blend may be used in asphalt or oil field applications.

A redispersible polymer powder composition includes at least one solvent selected from a process oil and an organic solvent, and a vinylacetate-ethylene (VAE)-based redispersible polymer powder pre-swelled by the solvent. The swelling ratio of the vinylacetate-ethylene (VAE)-based redispersible polymer powder exceeds 55%, measured by the equation swelling ratio (%)=[(B−A)/A]×100, where A is the initial mass of the vinylacetate-ethylene (VAE)-based redispersible polymer powder before adding the solvent, and B is the swelled mass of the vinylacetate-ethylene (VAE)-based redispersible polymer powder after adding the solvent and stirring at 300 rpm at room temperature (20° C.) for 30 minutes provided that the mixing ratio of the vinylacetate-ethylene (VAE)-based redispersible polymer powder and the solvent is 1:1 by weight.

Disclosed are asphalt and asphalt binders and methods for making such compositions with sterols. The sterols improve various rheological properties. Also disclosed are methods of determining the changes or improvements of various rheoloical properties.

Aspects of the present invention provide methods of drying lecithin in a batch reaction, comprising the steps of obtaining lecithin-containing material (derived from a crude refining stream) comprising 15-50% water, 10-30% acetone insoluble matter, and 10-20% free fatty acid; adding a fatty acid source (also derived from a crude refining stream) to the lecithin-containing material composition to obtain a lecithin/fatty acid reaction mixture; and blowing dry gas through the gum/fatty acid reaction mixture to obtain a resultant dried lecithin fatty acid blend having a water content of less than 2%. The resultant dried lecithin fatty acid blend may be used in asphalt or oil field applications.

A bituminous composition includes at least one bitumen base, at least one first chemical additive chosen from compounds of general formula Ar1-R.sub.1-Ar.sub.2 (I), and at least one second chemical additive chosen from a second chemical additive chosen from the reaction products of at least one C.sub.3-C.sub.12 polyol and of at least one C.sub.2-C.sub.12 aldehyde. This composition can be used for different industrial applications and as road binder, notably for the preparation of bituminous mixes.

The present invention provides a functionally dry warm mix asphalt binder composition modified with lubricating agents or additives that can be mixed with aggregate and compacted at temperatures substantially below asphalt binder compositions that do not contain the disclosed lubricating additives.

The present invention relates to a method for reducing the emission of hydrogen sulfide during the production of an asphalt composition.

Pavement aging can be reduced by applying to an asphalt-containing pavement a topcoat layer or a surface treatment containing asphalt binder emulsion with sterols.

Sulfur copolymerization includes combining elemental sulfur with modified bitumen to yield a mixture, blending the mixture, and curing the mixture to yield a copolymerized modified bitumen. The modified bitumen includes waste vegetable oil. Inverse vulcanization includes combining an unsaturated fatty acid and an alkaline earth metal (hydr)oxide to yield a mixture, combining elemental sulfur with the mixture, and processing the mixture to yield a sulfur copolymer.

Disclosed are asphalt and asphalt binders and methods for making such compositions with sterols. The sterols improve various rheological properties. Also disclosed are methods of determining the changes or improvements of various rheoloical properties.