TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The biomass-starting material is a lignin-containing material. The biomass-starting material is a lignocellulose material or a digestion product from the lignocellulosic material. The biomass-starting material comprises a lignin-containing stream from the digestion of lignocellulose material for preparing a cellulose (pulp), preferably a black liquor, such as black liquor from the kraft digestion (sulfate pulping). Preferred Process: The biomass-starting material in step (b) is subjected to pyrolysis for the digestion, and in step (c), the separation into fractions (c1) and (c2) takes place by absorption. The pyrolysis is performed without addition of hydrogen compounds, and with the addition of hydrogen (hydrocracking). A black liquor material with a moisture content of more than 70 (preferably more than 50) wt.% under normal conditions (20 degrees C, 1013 mbar) is used for the pyrolysis. The biomass-starting material in step (b) is subjected to digestion in the liquid phase, in the presence of an aqueous-alkaline, aqueous acidic or organic digestion medium, and in step (c), the separation into fractions (c1) and (c2) takes place by distillation and/or extraction. At least a cellulose-depleted fraction from a fuel cell process, especially a black liquor from the kraft process, is used for the digestion. In step (c), the separation into fractions (c1) and (c2) takes place by distillation, extraction, absorption (all preferred) and/or membrane process. The step (c) comprises extraction of the digested product obtained in step (b) to give aromatics enriched extract and a residue depleted in aromatics, optionally separation of the extract into a fraction enriched with an extractant and depleted with aromatics and a fraction enriched with aromatics and depleted with an extractant, and feeding the aromatics enriched extract or aromatics enriched fraction to step (d). The product obtained in step (b) or the fraction (c1), contains components with a molecular weight of at most 500 g/mole. The reaction in step (d) includes hydrodealkylation and/or steam dealkylation. The temperature and absolute pressure in the dealkylation zone is 400-900 (preferably 500-800) degrees C, and 1-100 (preferably 1-10) bar, respectively. The effluent from the dealkylation zone in step (e) is subjected to a separation to obtain following three streams: (e1) mononuclear, less or non-alkylated aromatics enriched stream (4); (e2) less or non-dealkylated aromatics enriched stream; and (e3) a volatile byproducts (that are lighter than the above two streams) enriched stream. The separation of the discharge from the dealkylation zone in step (e) comprises an absorption including: contacting the discharge from the dealkylation zone with an absorbent to obtain an absorbate enriched with aromatic main products of dealkylation and a gas stream depleted with aromatic main products of dealkylation; separation of the absorbate into the streams (e1), (e2) and optionally an absorbent containing stream; optionally recycling the absorbent containing stream; and optionally recycling at least a portion of the stream (e2) to the dealkylation zone of step (d). The fraction (c2) and the stream (e3) are at least partially used for the production of synthesis gas. The synthesis gas-containing stream or a hydrogen-enriched stream produced from the synthesis gas is fed to the digestion in step (b) and/or dealkylation in step (d). EXAMPLE - No suitable example given.