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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


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Requested Product

Title: Partial Dissolution of Preservative-Treated Wood with a Cellulose Solvent System of Lithium Chloride in N-Methyl-2-Pyrrolidinone

Source: Proceedings of the 66th International Convention, Forest Products Society, Washington, DC (June 3-5)

Author(s)Eberhardt, T.L.; Lebow, S.; Reed, K.G.

Publication Year: 2012  View PDF »

Category: Not Classified
Associated Research Project(s):   FPL-4723-3

Abstract: Recent studies have suggested that ionic liquids may be used to dissolve wood for the purpose of facilitating conversions to biofuels and chemical feedstocks. As an alternative, a cellulose solvent system based on lithium chloride (LiCl) in N-methyl-2-pyrrolidinone (NMP) was evaluated. Treatment of coarsely ground samples of loblolly pine wood with NMP under reflux gave yields of soluble materials that were higher than typical extractives contents thereby suggesting a limited degree of wood dissolution. Inclusion of LiCl, which disrupts hydrogen bonding, gave lower wood residue recoveries (i.e., higher dissolution) with higher LiCl concentrations. Alkaline Copper Quaternary (ACQ)-treated pine wood was also subjected to partial dissolution to determine if the copper could be separated from the wood residue or dissolved lignocellulosics. Using 8% LiCl in NMP, subsequent filtration of the resultant slurry gave approximately one third of ACQ-treated wood as a wood residue retaining little copper. Pouring the filtrate over an excess of water gave about one third of the original weight of ACQtreated wood as a lignocellulosic precipitate rich in copper. Results suggest that the partial dissolution of wood in this manner may provide a means to convert preservative-treated wood into lignocellulosic feedstocks potentially suitable for use in a biorefinery.

Publication Review Process: Non-Refereed (Other)

File size: 63 kb(s)

Date posted: 09/17/2012
RITS Product ID: 61419
Current FPL Scientist associated with this product
Lebow, Stan T.
Research Forest Products Technologist

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