Lignin Extraction from Black Liquor and its Application Prospects in Pulp Mills

This paper summarizes the possible application of lignin extraction from black liquor and the development of lignin extraction technology. Lignin extraction from black liquor is an important, economical method to resolve the bottleneck associated with the recovery boiler and achieve the targeted capacity expansion in pulp mills. A few of key issues must be taken into cosideration when lignin extraction technology is adopted on the industrial scale.