MODULAR SYSTEM AND METHODS OF PRODUCING UREA FROM BIOMASS Russian patent published in 2014 - IPC C07C273/04 

FIELD: chemistry.

SUBSTANCE: method includes steps of cleaning starting biomass material in order to remove all inorganic substances, mixing the cleaned starting biomass material to obtain a homogeneous mixture, granulating the mixed starting biomass material to obtain granules with a primarily homogeneous size, crushing the granules to particle size of 1 mm or smaller, gasifying the crushed granules in a gas generator, compressing a CO₂ stream to pressure of not less than about 6000 ft/in² and not greater than about 7000 ft/in², feeding a stream of NH₃ into a by-pass recycling system with a 30% conversion factor and pressure of not less than about 6000 ft/in² and not greater than about 7000 ft/in², and merging the compressed CO₂ stream with the compressed NH₃ stream.

EFFECT: invention enables to carry out cost-effective, small-scale production of urea, based on a modular principle in order to improve process control and mobility, providing pure and homogeneous biomass starting material.

11 cl, 9 dwg