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low quality of iron ore limonite

Limonite, alow-costiron ore, was investigated as apotential hydrotreatment catalyst for kraft lignin without the use of an external solvent (batch reactor, initial H 2 pressure of 100 bar, 4 h). The best results were obtained at 450 °C resulting in 34 wt % of liquefied kraft lignin (lignin oil) on lignin intake.

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