Lignin was isolated by following the procedure suggested byNuruddin, et al. shown in Fig. 2 [10]. The spent liquor washeated at 105◦C after pulping and delignification process. Thelignin dissolved in formic acid was precipitated by adding dis-tilled water (5 times more than volume of concentrated liquor)and the precipitate was filtered in a Buchner funnel. Finally,the precipitated lignin was washed with distilled water andvacuum dried over P2O