ALUNITE-TYPE COMPOUND PARTICLES, MANUFACTURING METHOD AND APPLICATION Russian patent published in 2010 - IPC C01F7/00 C08K3/30 B01J20/02 

FIELD: chemistry.

SUBSTANCE: alunite-type compound particles represented by the general formula (I) and featuring specific value for D₇₅/D₂₅, where D₂₅ is diametre of particles comprising 25% of the total particle amount, and D₇₅ is diametre of particles comprising 75% of the total particle amount at integral curve of particle size dispersion measured by laser beam diffraction method: M_a[Al_1-xM'_x]₃(SO₄ ^2-)_y(OH)_z·mH₂O (I), where M is at least one cation selected out of group including Na⁺, K⁺, NH₄ ⁺ and H₃O⁺, M' is at least one cation selected out of group including Cu²⁺, Zn²⁺, Ni²⁺, Sn⁴⁺, Zr⁴⁺ and Ti⁴⁺, and a, m, x, y and z comply with the following: 0.8 ≤ a ≤ 1.35, 0 ≤ m ≤ 5, 0 ≤ x ≤ 0.4, 1.7 ≤ y ≤ 2.5, and 4 ≤ z ≤ 7 respectively.

EFFECT: claimed particles of small mean particle size, spherical, disc or hexagonal form and extremely narrow size dispersion.