Title: Estimation of Kraft Pulp Yields in Continuous Mill Operation with Anthraquinone
Abstract: Laboratory cooks showed that a good correlation existed between pulp yields and ratios of xylose to glucose (X/G ratios), liberated from the pulps by an acid hydrolysis for the hardwoods, or those of mannose to glucose (M/G ratios) for the softwoods. Pulp yields at a mill trial could be estimated by knowing the ratios of the mill pulps. The optimal conditions in continuous kraft pulping for the improvement of pulp yields were applied to a mill trial using mixed hardwoods with polysulfide (PS) and anthraquinone (AQ), or mixed softwoods with AQ. For the isothermal cooking (ITC), PS cooking liquor containing 70% of total alkali and AQ were charged into a chip-feeding circulation line, and then kraft cooking liquor containing 30% of total alkali was introduced into three circulation lines. It was indicated that the PS-AQ ITC, or kraft-AQ cooking under the optimal conditions gave pulps with at least about 1.2-1.4% yield increases compared with the kraft cooking.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot