PROCESS FOR THE PRODUCTION OF A HEMICELLULOSE HYDROLYSATE AND SPECIAL PULP

摘要

AbstractThe invention relates to a process for the pro-duction of a hemicellulose hydrolysate and specialpulp through two steps, the first step comprising theprehydrolysis of the material and the second step thedissolving of the lignin contained in the prehydro-lyzed material, According to the process the lignindissolving is carried out by means of a neutral sul-phite cooking with anthraquinone or a derivativethereof as a catalyst, the pH of the cooking liquorbeing initially at least 10.