The present invention relates to a method for treating a lignocellulose biomass in order to dissolve the lignin therein, while the cellulose does not dissolve. The cellulose pulp obtained can be used to produce glucose. In addition the lignin can be isolated for subsequent use in the renewable chemical industry as a source for aromatic platform chemicals.

The present invention relates to a process for production of fossil free hydrocarbons from lignocellulosic material comprising the steps of: A-hydrolyzing the lignocellulosic material using ammonium bisulfite, whereby the conditions of the hydrolysis are being controlled by regulating pH, temperature, color, pressure, sulfite content, kappa number and/or R18, such that a desired product can be obtained for further processing of the hydrolyzed material. B-hydrothermal carbonizing the hydrolyzed material that is not further processed using hydrothermal liquefaction (HTL) or hydrothermal carbonization (HTC) to produce at least biooil. C-separating liquids and gases from prior process steps for cleaning and reuse of liquid, gases and chemicals contained therein. D-generating electricity and/or steam to perform the steps of the process by using liquid, gas, biooil or bio-coal produced in the prior process steps, to operate at least a part of the steps of the process.