Method for the breakdown of lignin

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

Reexamination Certificate

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C560S053000, C560S064000

Reexamination Certificate

active

07906687

ABSTRACT:
The invention describes a method for the direct production of molecules with a minimum molecular weight of 78 g/mol by the breakdown of lignin, lignin derivatives, lignin fragments, and/or lignin-containing substances or mixtures in the presence of at least one polyoxometallate and preferably in the presence of a radical scavenger in a liquid medium.

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Hill,Chemical Reviews, vol. 98, No. 1, Jan./Feb. 1998, pp. 1-389.
Okuhara et al., “Catalysis by heteropoly compounds-recent developments,”Applied Catalysis A: General, vol. 222, 2001, pp. 63-77.
Wu et al., “Improved Alkaline Oxidation Process for the Production of Aldehydes (Vanillin and Syringaldehyde) from Steam-Explosion Hardwood Lignin,”Ind. Eng. Chem. Res., vol. 33, Mar. 1994, pp. 718-723.
International Search Report issued for International Application No. PCT/CH2008/000078 on May 29, 2008 (with translation).

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