Anthraquinone and silanized functionalized materials derived from olive stone

A process to obtain a silane-functionalized material comprising:

• a) carrying out a silanization process of the hydroxyl groups on the surface of a non-carbonized lignocellulosic material comprising hemicellulose and lignin with an organofunctional alkoxysilane molecule selected from the group consisting of an aminoalkyltrialkoxysilane selected from 3-aminopropyltriethoxysilane (APTES), 3-aminopropylmethyldiethoxysilane (APMDES), 3-aminopropyldimethylethoxysilane (APDMES), 3-Chloropropylmethyldiethoxysilane, Aminoethylaminopropyltriethoxysilane, and Piperazinylpropylmethyldimethoxysilane;
• wherein the silanization process of step a) is carried out, in the presence of an organic solvent, by adding to, a stirred suspension;
• of non-carbonized lignocellulosic material derived from olive stone present in the said organic solvent, an organofunctional alkoxysilane molecule at a temperature from 20 to 250° C. and at reaction times from 2 to 24 h, and then optionally allowing the reaction to cool and optionally filtering washing, and/or drying so as to obtain the reaction product;
• and
• wherein the non-carbonized lignocellulosic material is derived from milled/grounded olive stones.