TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: In the conversion of lignin to liquid hydrocarbons, the temperature ranges from 290-320 degrees C. The lignin is selected from Organosolv lignins, or Kraft lignins. Also, the lignin is selected from: lignins deriving as by-product from the production processes of ethanol from lignocellulosic biomasses; lignins deriving from agricultural products or waste products deriving from the processing of the agricultural products; lignins deriving from solid urban waste. The hydrogenolysis catalyst is selected from supported catalysts having formula (I): M1/C; (II): M1/aluminnm oxide (Al2O3); (III): M2/silicon dioxide (SiO2); or (IV): M2/Al2O3.M1=a metal selected from palladium, ruthenium, platinum; andM2=nickel.The hydrogenolysis is carried out batchwise and the hydrogenolysis catalyst is used in a quantity ranging from 0.1-20% by weight with respect to the total weight of the lignin. Also, the hydrogenolysis carried out batchwise is carried out in the presence of a solvent. The solvent is selected from: low-boiling solvents having a boiling point less than or equal to 120 degrees C such as: water; methanol; ethanol; propanol; isopropanol; methyl acetate; ethyl acetate; acetone; methyl ethyl ketone; or mixtures; hydroxy-aromatic solvents having a boiling point greater than or equal to 150 degrees C such as: phenol; cresol; 2-methoxy-4-ethyl-phenol; 2-methoxy-4-(2-propyl)-phenol; mixtures of phenols, alkyl phenols and methoxy alkyl phenols deriving from the hydrogenolysis of lignin carried out batchwise, or in continuous; or mixtures. The solvent is selected from mixtures of phenols, alkyl phenols, and methoxy alkyl phenols deriving from the hydrogenolysis of lignin carried out batchwise, or in continuous. The solvent is used in such a quantity as to have a solvent/lignin weight ratio less than or equal to 20/1 or 15/1-0.5/1. The hydrogenolysis carried out batchwise is carried out at a partial hydrogen pressure ranging from 1-20 MPa, preferably 3-15 MPa for a time ranging from 9 minutes to 10 hours, preferably 18 minutes to 5 hours. The hydrogenolysis is carried out in continuous in the presence of a solvent. The hydrogenolysis carried out in continuous is carried out at a liquid hourly space velocity (LHSV), i.e. at a ratio between the volume of the lignin, or between the volume of the lignin/solvent mixture, fed in one hour, and the volume of the catalyst, the ratio being measured in hours-1, ranging from 0.2-6 hours-1. The hydrotreating is carried out in a single step or in multiple steps in the presence of at least one hydrotreating catalyst. The process for the conversion of lignin to liquid hydrocarbons according to claim 27, where the hydrotreating catalyst is selected from supported catalysts having formula (III); (V): M3M/Al2O3; (VI): M3M/SiO2-Al2O3; (VII): M3MP/Al2O3; or (VIII): M3MP/SiO2-Al2O3.M=a metal selected from molybdenum, tungsten;M2=nickel;M3=a metal selected from cobalt, nickel; andP=phosphorus.In the hydrotreating catalysts having formula (V), (VI), (VII), or (VIII), the metals deposited on the supports (i.e. alumina, silica, silica-alumina mixed oxides) are used in their sulfided form. The hydrotreating is carried out batchwise and the hydrotreating catalyst is used in a quantity ranging from 0.1-20% by weight with respect to the total weight of the depolymerized lignin. The hydrotreating carried out batchwise is carried out in the presence of a solvent selected from: linear, branched or cyclic 10-12C hydrocarbons, such as: decane; dodecane; decahydronaphthalene (decalin); tetrahydronaphthalene (tetralin); dihydronaphthalene; or mixtures; the hydrocarbons having a boiling point ranging from 170-210 degrees C; hydroxy-aromatic solvents having a boiling point greater than or equal to 150 degrees C such as: phenol; cresol; 2-methoxy-4-ethyl-phenol; 2-methoxy-4-(2-propyl)-phenol; mixtures of phenols, alkyl phenols and methoxy alkyl phenols deriving from the hydrogenolysis of lignin carried out batchwise, or in continuous; or mixtures. The solvent is selected from mixtures of phenols, alkyl phenols and methoxy alkyl phenols deriving from the hydrogenolysis of lignin carried out batchwise, or in continuous. The solvent is used in such a quantity as to have a solvent/depolymerized lignin weight ratio less than or equal to 15/1, or 10/1-0.5/1. The hydrotreating carried out batchwise is carried out at a temperature ranging from 300-500 degrees C, preferably 380-420 degrees C for 6 minutes to 10 hours, preferably 12 minutes to 5 hours. The hydrotreating is carried out in continuous. The hydrotreating carried out in continuous is carried out in the absence of a solvent. Also, the hydrotreating carried out in continuous is carried out in the presence of a solvent selected from hydroxy-aromatic solvents having a boiling point greater than or equal to 150 degrees C such as: phenol; cresol; 2-methoxy-4-ethyl-phenol; 2-methoxy-4-(2-propyl)-phenol; mixtures of phenols, alkyl phenols and methoxy alkyl phenols deriving from the hydrogenolysis of lignin carried out batchwise, or in continuous; or mixtures. The hydrotreating carried out in continuous is carried out at the LHSV. EXAMPLE - No suitable example given.