CARBON-MINERAL SORBENT AND METHOD FOR ITS PRODUCTION Russian patent published in 2023 - IPC B01J20/08 B01J20/20 B01J20/30 B01D53/04 

FIELD: chemical technology.

SUBSTANCE: group of inventions relates to sorbents and methods for producing carbon-mineral sorbents, which can be used to purify solutions and gases from organic compounds as carriers for the preparation of catalysts, recovery of volatile solvents. A carbon-mineral sorbent is presented, including aluminium oxide and activated carbon, characterized in that an aluminium compound Al₂O₃⋅nH₂O is used as a precursor of aluminium oxide, where n=0.3-2.0, obtained by rapid partial dehydration of hydrargillite, the sorbent is formed during the heat treatment of the aluminium compound and activated carbon and has the following composition, wt.%: coal 1-60, aluminium oxide 40-99. In another embodiment, a method for producing a carbon-mineral sorbent is provided, which includes the extrusion moulding of a mixture of aluminium hydroxide, activated carbon, followed by drying, heat treatment, characterized in that an aluminium compound Al₂O₃⋅nH₂O is used as aluminium hydroxide, where n=0.3-2.0, obtained by rapid partial dehydration of hydrargillite, mixed with aqueous solutions of acids with M_K = 0.01-0.25 and with coal, sorbent granules are formed, then drying is carried out at a temperature of 80-120°C and heat treatment is carried out at a temperature of 300-350°C. A method is also presented for extracting volatile chemical compounds, including alcohols, ketones, aromatic hydrocarbons from gas-air mixtures, including passing the gas-air mixture through a sorbent layer and subsequent desorption, characterized in that a granular carbon-mineral sorbent is used as a sorbent, while the adsorption process is carried out in periodic mode in adsorbers with a stationary adsorbent bed at temperatures of 18-35°C.

EFFECT: development of a sorbent with high strength, with an optimal porous structure and obtained by a simple technology with the lowest energy consumption and without environmentally harmful effluents.

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