METHOD OF OBTAINING ORGANOMODIFIED MONTMORILLONITE WITH INCREASED THERMAL STABILITY (VERSIONS) Russian patent published in 2014 - IPC C01B33/44 C09C3/00 C08K3/34 C08K9/04 B82B3/00 

FIELD: chemistry.

SUBSTANCE: method of obtaining organomodified montmorillonite with increased thermal stability includes obtaining non-modified purified montmorillonite-based bentonite by primary preparation of initial raw material, which includes sieving obtained from pit bentonite powder, mainly consisting of montmorillonite, from coarse mechanical inclusions, dispersion of bentonite powder in water medium in high-speed colloid mill, its additional chemical processing in reservoirs with top-drive mixers, processing in the system of hydrocyclone installations and shaker screens, processing in high-speed centrifuge of drum-type, processing in Z-type mixer, provided with vaccumisation unit, drying and grinding of finished product - non-modified purified montmorillonite-based bentonite. Process of organomodification consists in additional chemical processing of non-modified purified montmorillonite-based bentonite in reservoirs with top-drive mixers, further processing in high-speed drum-type centrifuge, mixing and introduction of additives, selected from a series of several combinations, for instance, resorcinol diphosphate-based oligomer, quaternary ammonium salt [R₁N⁺(CH₃)₃]Cl^-, where R₁ is fatty aliphatic radical with number of carbon atoms mainly 16-18 and resorcinol diphosphate-based oligomer; quaternary ammonium salt [R₁N⁺(CH₃)₃Cl^-, where R₁ is fatty aliphatic radical with number of carbon atoms mainly 16-18, quaternary ammonium salt [R₁R₂N⁺(CH₃)₂]Cl^-, where R₁ and R₂ are fatty aliphatic radicals with number of carbon atoms mainly 14-16 and resorcinol diphosphate-based oligomer, etc.

EFFECT: increased thermal stability of organomodified montmorillonite.

2 cl, 1 tbl