Method of delignification of plant material, said method comprising:



providing said plant material comprising cellulose fibres and lignin;
exposing said plant material requiring to a composition comprising:

an acid;
a modifying agent selected from the group consisting of: sulfamic acid; imidazole; N-alkylimidazole derivative; taurine; a taurine derivative; a taurine-related compound; alkylsulfonic acid; arylsulfonic acid; triethanolamine; and combinations thereof;
a metal oxide; and
a peroxide;


adding an organic solvent to the resulting mixture;
allowing a delignification reaction to occur for a period of time sufficient to remove at least 80% of the lignin present on said plant material.