Composite Additive for Fuel

Abstract

Provided is a composite additive for fuel capable of significantly delaying a phase separation phenomenon even in poor environmental conditions such as high humidity, low temperature, storage for a long period of time, and the like, preventing freezing in winter due to a lower freezing point, and having an excellent cleaning effect on impurities fixedly adhered in an engine. Further, the composite additive for fuel may prevent fuel from being used for purposes other than as a fuel, for example, as a drink, and avoid causing fatal problems.

What is claimed is: 
     
         1 . A composite additive for fuel comprising:
 biobutanol;   a ketone based compound including one or two or more selected from methylethylketone, methylisopropylketone, methylisobutylketone, and 5-methyl-3-heptanone; and   an ether based compound including one or more selected from methyl tert-butylether and ethyl tert-butylether.   
     
     
         2 . The composite additive for fuel of  claim 1 , wherein it contains 10 to 100 parts by weight of the ketone based compound and 0.1 to 20 parts by weight of the ether based compound, based on 100 parts by weight of biobutanol. 
     
     
         3 . The composite additive for fuel of  claim 1 , further comprising tert-butanol. 
     
     
         4 . The composite additive for fuel of  claim 3 , wherein it contains 10 to 100 parts by weight of tert-butanol, based on 100 parts by weight of biobutanol. 
     
     
         5 . The composite additive for fuel of  claim 3 , further comprising denatonium benzoate. 
     
     
         6 . The composite additive for fuel of  claim 5 , wherein it contains 10 to 100 parts by weight of tert-butanol and 0.001 to 1 part by weight of denatonium benzoate, based on 100 parts by weight of biobutanol. 
     
     
         7 . The composite additive for fuel of  claim 1 , wherein the ketone based compound contains one or two or more (C4-C6) ketone based compounds selected from methylethylketone, methylisopropylketone, and methylisobutylketone, and 5-methyl-3-heptanone. 
     
     
         8 . The composite additive for fuel of  claim 7 , wherein the ketone based compound contains 5 to 100 parts by weight of 5-methyl-3-heptanone, based on 100 parts by weight of the (C4-C6) ketone based compound. 
     
     
         9 . A fuel comprising the composite additive for fuel of  claims 1 . 
     
     
         10 . The fuel of  claim 9 , wherein the fuel is gasoline fuel or alcohol based fuel.