National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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Understanding the Nature and Reactivity of Residual Lignin for Improved Pulping and Bleaching Efficiency.

DE2002789815

Publication Date	2001
Personal Author	Lai, Y. Z.
Page Count	66
Abstract	One of the most formidable challenges in kraft pulping to produce bleached chemical pulps is how to effectively remove the last 5-10% of lignin while maintaining the fiber quality. To avoid a severe fiber degradation, kraft pulping is usually terminated in the 25-30 kappa number range and then followed by an elementally chlorine free (ECF) or a totally chlorine free (TCF) bleaching sequence to reduce the environmental impacts.
Keywords	Paper industry Bleaching Pulping Lignin Diphenylmethane Delignification Kraft paper Fibers Kraft pulping Residual lignin
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	State Univ. of New York Coll. of Environmental Science and Forestry, Syracuse.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	200218

Understanding the Nature and Reactivity of Residual Lignin for Improved Pulping and Bleaching Efficiency.

Understanding the Nature and Reactivity of Residual Lignin for Improved Pulping and Bleaching Efficiency.
DE2002789815

Publication Date	2001
Personal Author	Lai, Y. Z.
Page Count	66
Abstract	One of the most formidable challenges in kraft pulping to produce bleached chemical pulps is how to effectively remove the last 5-10% of lignin while maintaining the fiber quality. To avoid a severe fiber degradation, kraft pulping is usually terminated in the 25-30 kappa number range and then followed by an elementally chlorine free (ECF) or a totally chlorine free (TCF) bleaching sequence to reduce the environmental impacts.
Keywords	Paper industry Bleaching Pulping Lignin Diphenylmethane Delignification Kraft paper Fibers Kraft pulping Residual lignin
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	State Univ. of New York Coll. of Environmental Science and Forestry, Syracuse.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	200218