u00b0 c for 1 2 minutes the gk taa appeared to be totally dissolved cellulose was oxidized as above using 41 g 10 g o d of the never dried pulp 0 5 g nahco 3 75 ml water and 14 ml of the 6 7 g l clo 2 solution to this was added either 0 11 g 0 26 g 0 50 g or 0 75 g of the catalyst solution these catalyst additions correspond to 0 011 0 026 0 050 and 0 075 by weight based on dry cellulose after 30 minutes reaction time at 70 u00b0 c the samples with the two highest catalyst usages were white in appearance the next lower usage sample had a faint off white color and the lowest catalyst usage sample was a light yellow after 2 hours the samples were removed from the water bath and drained the unwashed oxidized material was stabilized by treatment with 30 ml of the 6 7 g l clo 2 solution and 3 g 3 h 2 o 2 the ph was adjusted to u02dc 1 by 1 m h 2 so 4 treatment was continued for about 30 minutes at 60 u00b0 c the samples were then filtered off and washed with deionized water carboxyl analyses indicated the following levels of substitution sample no catalyst wt carboxyl meq 100 g 1 0 011 5 5.