METHOD OF PRODUCTION OF THE HIGH-STRUCTURED CARBON-MINERAL COMPOSITES PRODUCED OUT OF THE HIGH-ASH BIOMASS Russian patent published in 2007 - IPC C01B33/12 C01B31/00 

FIELD: chemical industry; methods of production of the carbon-mineral absorbents.

SUBSTANCE: the invention is pertaining to production of the carbon-mineral absorbents - the high-carbonized amorphous silicon dioxide out of the high-ash lignocellulose raw. The lignocellulose raw is treated either in the solid state, or in suspension, or in the form of solution of the carbonates of the metals of the first (1а) Group of Periodic system, or their combinations in the ratio of 2-15 mole of the carbonate to 1 kg of the source biomass, the optimal version is 5 mole/kg. In case of the solution the produced mixture at first is evaporated at 110-120°С, then any mixture is subjected to the fusion at the temperature of 750-950°С, it is preferential - at 850-900°С or - in the inert medium, or in the reducing medium of the gases of the fusion phase. The produced solid residue at the temperature of 30-60°С solve in the minimum water volume (the mass ratio of the water/alloy = 3-4). The optimal ratio of the water/alloy = 3.3. Through the produced solution gate the gaseous carbon dioxide, or the gases containing the gaseous carbon dioxide, up to рН=8-9. The settled gel is aged within 10-100 hours, the preferable version is 20-30 hours. After washing of the gel SiO₂ with the carbonic particles contained in it is withdrawn, the produced material is dried at the temperature of up to 100°С and incinerated at the temperature of 130-200°С. The invention allows to produce the composite material with the specific surface of up to 700 m²/g using the simple and ecologically safe method.

EFFECT: the invention ensures production of the composite material with the specific surface of till 700 m²/g using the simple and ecologically safe method.

4 cl, 2 dwg, 6 ex