Delignification of pine wood meals using high boiling point solvents and acidic catalysts

In this study, we separated the lignin from Pinus densi flora by using the acidic catalyst. High boiling point solvents were used to remove the lignin in the pine wood meals. The high boiling solvents used for delignification of pine wood meals are methyl cellosolve, ethyl carbitol, triethylene glycol and methyl isobutyl ketone. Yield and residual lignin of delignified samples were decreased with acidic catalyst content. Residual lignin was the lowest at 5.2% HCl dosage used E-Ca as high boiling point solvents. Also, delignification was the highest at 5.2% HCl dosage used E-Ca as high boiling point solvents. As the results, the optimum high boiling point solvent and acidic catalyst for delignification of wood were E-Ca and HCl, respectively, and the acid catalyst should not exceed a maximum of 5.2%.