Methods for reducing odors in asphalt

Abstract

Compositions and methods for reducing the foul odors of a hydrocarbonaceous material such as asphalt comprise the addition of an odor reducing amount of a reducing carbohydrate and/or a soluble zinc compound. The reducing carbohydrate may be a monosaccharide, oligosaccharide or polysaccharide, including a starch; and it may be used as a sole odor reducing agent or in combination with soluble zinc compounds and/or other odor reducing compounds.

What is claimed is: 
     
         1 . A method for reducing the undesirable odors of a hydrocarbonaceous material, comprising adding to the hydrocarbonaceous material a composition containing an odor mitigating amount of at least one reducing carbohydrate. 
     
     
         2 . The method of  claim 1  wherein the reducing carbohydrate is a monosaccharide. 
     
     
         3 . The method of  claim 2  wherein the monosaccharide is glucose. 
     
     
         4 . The method of  claim 1  wherein the reducing carbohydrate is a polysaccharide. 
     
     
         5 . The method of  claim 4  wherein the polysaccharide has a DE from about 2 to about 70. 
     
     
         6 . The method of  claim 1  wherein the reducing carbohydrate is an oligosaccharide. 
     
     
         7 . The method of  claim 1  wherein the hydrocarbonaceous material is an asphalt. 
     
     
         8 . The method of  claim 1  wherein the odor mitigating amount is from about 0.001% w/v to about 5.0% w/v. 
     
     
         9 . The method of  claim 1 , further comprising adding to the hydrocarbonaceous material at least one additional odor mitigating compound. 
     
     
         10 . The method of  claim 9  wherein the at least one additional odor mitigating compound is selected from a soluble zinc compound or a carbonyl compound having a molecular weight greater than about 100 Daltons and a boiling point greater than about 375° F. 
     
     
         11 . A method for reducing the undesirable odors of a hydrocarbonaceous material, comprising adding to the hydrocarbonaceous material a concentrate containing an odor mitigating amount of at least one soluble zinc compound. 
     
     
         12 . The method of  claim 11  wherein the soluble zinc compound is a salt of a C8-C20 fatty acid. 
     
     
         13 . The method of  claim 12  wherein the soluble zinc compound is selected from salts of lauric acid, myristic acid, myristoleic, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linioleic acid, and linolenic acid. 
     
     
         14 . The method of  claim 11  wherein the soluble zinc compound is a salt of a C12-C18 fatty acid. 
     
     
         15 . The method of  claim 11  further comprising adding to the hydrocarbonaceous material at least one additional odor mitigating compound. 
     
     
         16 . The method of  claim 12  wherein the at least one additional odor reducing compound is selected from a reducing carbohydrate or a carbonyl compound having a molecular weight greater than about 100 Daltons and a boiling point greater than about 375° F. 
     
     
         17 . The method of  claim 11  wherein the hydrocarbonaceous material is an asphalt. 
     
     
         18 . The method of  claim 11  wherein the odor mitigating amount is from about 0.001% w/v to about 5.0% w/v.