The influence of cooking conditions on the degradation of hexenuronic acid, xylan, glucomannan and cellulose during kraft pulpin of softwood

摘要

The influence of hydroxyl ion concentration, hydrogen sulfide ion concentration, ionic strength and temperatu- re on the dissolution/degradation of hexenuronic acid, xylan, glu- comannan and cellulose in kraft pulping of Norwegian spruce was studied. A mathematical model of the dissolution/degrada- tion for hexenuronic acid was developed. Approximate rate con- stants for glucomannan and xylan were also developed.