METHOD FOR OBTAINING ALUMINIUM TRIHYDROXIDE Russian patent published in 2016 - IPC C01F7/02 C08K3/22 C09C1/40 

FIELD: chemistry.

SUBSTANCE: inventions can be used as fire-protective means. Method for milling with simultaneous drying of raw material mixture, containing aluminium trihydroxide with average size of particles D₅₀ in the range from 50 to 130 mcm, BET specific surface in the range from 0.01 to 0.5 m²/g and water content from 0.1 to 20 wt % counted per raw material mixture, includes the following stages: 1) supply of raw material mixture into milling and drying aggregate, ii) supply of hot air flow with temperature in the range from 20 to 120°C into milling and drying aggregate, with flow passing through milling and drying aggregate; and iii) milling aluminium trihydroxide, contained in raw material mixture, in milling and drying aggregate with obtaining aluminium trihydroxide with the following characteristics: average size of particles D₅₀ in the range from 3 to 15 mcm, BET specific surface in the range from 2 to 9 m²/g and water content in the range from 0 to 2 wt % counted per aluminium trihydroxide. Application of aluminium trihydroxide, obtained by the claimed method and characteristic in method for obtaining thermosetting plastic.

EFFECT: inventions make it possible to use aluminium trihydroxide with wide range of particles, increase energy effectiveness, and avoid aluminium trihydroxide dehydration.

13 cl, 3 dwg, 3 tbl