Process for preparing a synthetic fuel from solid, combustible materials

Abstract

The invention is directed to a process for preparing a synthetic fuel from solid, combustible materials by treating these materials with a water-redispersible polymer powder composition.

1 . A process for preparing a synthetic fuel from solid, combustible materials, comprising treating the combustible materials with a water-redispersible polymer powder composition.  
     
     
         2 . The process of  claim 1 , wherein the solid, combustible material is selected from the group consisting of coal, wood, and waste plastic materials.  
     
     
         3 . The process of  claim 1 , wherein the water-redispersible polymer powder is based on one or more monomers selected from the group consisting of vinyl esters, (meth)acrylates, vinyl aromatics, olefins, 1,3-dienes and vinyl halides and, if required, further monomers copolymerizable therewith.  
     
     
         4 . The process of  claim 1 , wherein the water-redispersible polymer powder comprises one or more polymers selected from the group consisting of homopolymers and copolymers of vinyl ester monomers; copolymers of vinyl acetate and ethylene; copolymers comprising vinyl acetate, ethylene and a vinylester of at least one a-branched monocarboxylic acids having 9 to 11 C atoms, said homopolymers and copolymers optionally containing one or more auxiliary monomers.  
     
     
         5 . The process of  claim 1 , wherein the redispersible polymer powder composition is metered onto the combustible material in dry form, the mixture of combustible material and redispersible polymer powder is transported along a conveyor, and is treated with water or steam before entering a mill, where the combustible material and polymer are thoroughly mixed.  
     
     
         6 . The process of  claim 1 , wherein the solid, combustible material is transported along a conveyor, is treated with water or steam, and subsequently a redispersible polymer powder is metered onto the coal carrying conveyor just before entering a mill, where the combustible material and polymer are thoroughly mixed.  
     
     
         7 . The process of  claim 1 , wherein the redispersible polymer powder composition is metered onto the combustible material, and the mixture of combustible material and redispersible polymer powder is transported along a conveyor and a the mill where the combustible material and polymer powder are thoroughly mixed, and water or steam is introduced.  
     
     
         8 . The process of  claim 1 , wherein the redispersible polymer powder composition is metered onto the combustible material, and the mixture of combustible material and redispersible polymer powder is transported along a conveyor and into a mill where the combustible material and polymer powder are thoroughly mixed, and after the material exits the mill, the mixture is treated with water or steam.  
     
     
         9 . The process of  claim 1 , wherein the solid, combustible material proceeds along a conveyor and is sprayed with an aqueous redispersion of the redispersible polymer before entering a mill, where the combustible material and redispersible polymer are thoroughly mixed.  
     
     
         10 . The process of  claim 1 , wherein the solid, combustible material proceeds along a conveyor and is enters a mill, where an aqueous redispersion of the redispersible polymer is added, and the mixture is thoroughly mixed in the mill.  
     
     
         11 . The process of  claim 1 , further comprising forming the mixture of redispersible polymer powder and combustible material into briquettes.