Process for the preparation of vinylene carbonate, polyvinylene carbonate and the use thereof and the preparation of a lithium ion battery comprising said vinylene carbonate

Abstract

The invention relates to a process for the preparation of vinylene carbonate of the formula (I) by reacting a monohaloethylene carbonate of the formula (II) in which X is a halogen atom, with a dehydrohalogenating agent at elevated temperature in the presence of an organic solvent, characterized in that the organic solvent employed is ethylene carbonate. The process according to the invention enables vinylene carbonate to be prepared in a simple manner and in high yield. The vinylene carbonate prepared in accordance with the invention can be used for various applications.

1 . A process for the preparation of vinylene carbonate of formula (I)  
       
         
           
           
               
               
           
         
         comprising reacting a monohaloethylene carbonate of formula (II)  
         
           
             
             
                 
                 
             
           
         
         in which X is a halogen atom, with a dehydrohalogenating agent at elevated temperature in the presence of an organic solvent comprising ethylene carbonate.  
       
     
     
         2 . The process according to  claim 1 , carried out at a temperature of 40-80° C.  
     
     
         3 . The process according to  claim 1 , carried out at a temperature of 60° C.  
     
     
         4 . The process according to  claim 1 , carried out for 1 to 4 hours.  
     
     
         5 . The process according to  claim 1 , carried out for 2 hours.  
     
     
         6 . The process according to  claim 1 , wherein the dehydrohalogenating agent comprises an alkali metal solution, an amine, an alkylamide or a heterocyclic nitrogen compound.  
     
     
         7 . The process according to  claim 1 , wherein the dehydrohalogenating agent comprises a trialkylamine.  
     
     
         8 . The process according to  claim 1 , wherein the dehydrohalogenating agent comprises triethylamine.  
     
     
         9 . The process according to  claim 1 , wherein the monohaloethylene carbonate comprises monoethylene carbonate.  
     
     
         10 . The process according to  claim 1 , wherein the reaction is carried out under an inert gas atmosphere.  
     
     
         11 . The process according to  claim 1 , further comprising separating vinylene carbonate by distillation.  
     
     
         12 . The process according to  claim 1 , further comprising separating vinylene carbonate by vacuum distillation in a thin-film evaporator.  
     
     
         13 . A process according to  claim 1 , further comprising introducing into a cell an electrolyte containing said vinylene carbonate, to form a lithium ion battery.  
     
     
         14 . A process according to  claim 1 , further comprising polymerizing said vinylene carbonate to produce polyvinylene carbonate.