Synthesis methods of 4A-zeolite from coal gangue
 
                 
                
                    
                                        
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Graphical Abstract
 
                                        
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Abstract
    This paper summarizes the chemical composition of coal gangue and the crystal structure of 4A-zeolite,mainly introduces the traditional method and the new thechology of using coal gangue to synthesize 4A-zeolite.And compare with the traditional method and the new process,discusses the existing problems in current research and the direction of development.
 
                                        
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