Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
Email

 

You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Possible mechanism for anthraquinone species diffusion in alkaline pulping

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

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

Publication Year: 2007  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4709-3A

Abstract: 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

File size: 154 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 1642
Current FPL Scientist associated with this product
Zhu, JunYong
Research General Engineer
  

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »


Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »


Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


Nanotechnology

A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »


Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »