Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (154 KB bytes)

Title: Possible mechanism for anthraquinone species diffusion in alkaline pulping

Author: Chai, X.-S.; Samp, J.; Hou, Q.X.; Yoon, S.-H; Zhu, J.Y.;

Date: 2007

Source: Industrial & engineering chemistry research. Vol. 46, no. 15 (2007): Pages 5245-5249

Publication Series: Miscellaneous Publication

Description: An analysis of the effectiveness of anthraquinone (AQ) in kraft-AQ pulping in terms of its mechanism of transport has been conducted. Our previous work showed that caustic solutions of wood lignin can decrease the membrane exclusion for anthraquinones, i.e., the presence of wood lignin enhances the ability of AQ to pass through a membrane when a reducing agent is present in the acceptor stream. This work seeks to demonstrate that a similar behavior may occur during pulping. The adsorption behavior of AQ species was analyzed, and it was shown that anthraquinone-2-sulfonic acid (AQ-S), a water soluble derivative of AQ, selectively adsorbed on wood. The adsorption of AQ dispersed in a caustic lignin solution also showed selective adsorption on wood, to an even greater extent than the AQ-S. This adsorption behavior, along with the membrane penetration behavior described in our previous work, leads to a mechanism for the transport of AQ into wood chips during kraft pulping.

Keywords: Membranes, sulphate pulping process, anthraquinones, lignin, adsorption, pine, pulping, chips, maple, sulfonic acid, pulp and paper processes, AHQ, delignification

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Chai, X.-S.; Samp, J.; Hou, Q.X.; Yoon, S.-H; Zhu, J.Y. 2007. Possible mechanism for anthraquinone species diffusion in alkaline pulping. Industrial and Engineering Chemistry Research. 46(15): 5245-5249.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.