METHOD FOR CONTINUOUS CONVERSION OF LIGNIN INTO COMPOUNDS SUITABLE FOR USE Russian patent published in 2017 - IPC C07G1/00 C10G1/00 C10G3/00 C10L1/04 C07C37/00 C07C37/50 

FIELD: chemistry.

SUBSTANCE: invention relates to the continuous process for conversion of lignin in the lignin feedstock. The continuous process for conversion of lignin feedstock containing lignin, contains: deoxygenation of lignin up to collection of conversion products of lignin in the reactor for the conversion of lignin containing liquid composition which comprises at least one compound which is liquid at 1 bar and 25°C; while simultaneously continuously removing at least part of the aggregated lignin conversion products from the reactor; where conversion of lignin is carried out in contact with hydrogen and the first catalyst; conversion of lignin is carried out at the pressure and temperature of conversion of lignin, where lignin conversion temperature is in the range above the boiling temperature of said liquid composition at atmospheric pressure and below the critical temperature of the liquid composition, and lignin conversion pressure is higher than the pressure in the bubble of the said liquid composition at the lignin conversion temperature, in this case the lignin conversion pressure is chosen avoiding coke formation as per the following steps: determination of pressure in the bubble of the said liquid composition at the lignin conversion temperature, reaction and analysis for coke presence, and if coke is present the said pressure is increased so that coke formation after two cycles in the reactor is absent.

EFFECT: invention provides implementation of the continuous process to obtain useful products, impurities are removed during conversion, which leads to wastewater with lower chemical consumption of oxygen (CCO).

17 cl, 7 tbl, 9 dwg