The rationale for this research is to more efficiently produce higher yield and uniform linerboard grade pulps comparable to current manufacturing technologies using a modified kraft cooking characterized by a green l...The rationale for this research is to more efficiently produce higher yield and uniform linerboard grade pulps comparable to current manufacturing technologies using a modified kraft cooking characterized by a green liquor pretreatment stage. The pretreatment stage employed is considered a low capital method that employs mill green liquor at the front end of cook. Since green liquor typically has a high sulfidity to alkalinity ratio, it is ideal for significant improvements to pulp properties.The manufacture of linerboard grade pulps in this study has been accomplished in the laboratory by pretreating industrially supplied southern pine chips with varying concentrations of green liquor and anthraquinone (AQ). The influence of the pretreatment level of green liquor, pretreatment time, AQ, kraft cooking AA dosage, and H-factor on the properties of the pulp obtained was investigated. The potential benefits of this green liquor pretreatment pulping technology for the paper industry are a decrease in alkali digester consumption, shortened cooking times, and pulp yield increases.展开更多
文摘The rationale for this research is to more efficiently produce higher yield and uniform linerboard grade pulps comparable to current manufacturing technologies using a modified kraft cooking characterized by a green liquor pretreatment stage. The pretreatment stage employed is considered a low capital method that employs mill green liquor at the front end of cook. Since green liquor typically has a high sulfidity to alkalinity ratio, it is ideal for significant improvements to pulp properties.The manufacture of linerboard grade pulps in this study has been accomplished in the laboratory by pretreating industrially supplied southern pine chips with varying concentrations of green liquor and anthraquinone (AQ). The influence of the pretreatment level of green liquor, pretreatment time, AQ, kraft cooking AA dosage, and H-factor on the properties of the pulp obtained was investigated. The potential benefits of this green liquor pretreatment pulping technology for the paper industry are a decrease in alkali digester consumption, shortened cooking times, and pulp yield increases.
