Preparation and Identification of Sodium Deoxycellulosesulfonate.

A new cellulose derivative, sodium deoxycellulosesulfonate was prepared by a nucleophilic substitution of cellulose p-toluenesulfonate (cellulose tosylate) with sodium hydrogensulfite under refluxing in water.Degree of substitution of water-insoluble fraction of the sulfonate increased with reaction time and it was about 0.10 for cel lulose tosylate with DS of 0.92 and 0.065 for that with DS of 0.79 at 24 h, respectively.Yield of the insoluble sulfonates decreased with reaction time and showed a value as low as 48 mol% for cellulose tosylate with DS of 0.92 at 48 h.Conversions of the p-toluenesulfonate group to the sulfonate group were 11 and 8.2 mol% for cellu lose tosylates with DS of 0.92 and 0.79 at 24 h, respectively, and p-toluenesulfonate group still remained even af ter the reaction of 48 h.The sodium deoxycellulosesulfonate was identified by dyeing test with Methylene Blue for acid group, micro combustion test for sulfur, incineration test for sulfonate and sulfate groups, and hydrolysis-incineration test for sulfonate group, as well as with IR absorption spectra.