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Production of cellulose gum from sugar cane bagasse

Sugar cane bagasse is treated wih NaOH to remove lignin and free cellulose. The carboxymethylation reaction produces alkali cellulose:-Carboxymethylcellulose. It  is ether in which the hydroxyle group of anhydrous glucose is replaced by the carboxymethyl group of monochloroacetate. It is produced by two consecutive reaction: basification and etherification. 


 [C6H7O2(OH)]n + nNaOH==>[C6H7O2(OH)2ONa]n + nH2O


 [C6H7O2(OH)2ONa]n + nClCH2COONa==> [C6H7O2(OH)2OCH2COONa]n + nNaCl

Schematic flow sheet of  cellulose extraction from bagasse


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