HYDROTALCITE-LIKE COMPOUND AND METHOD OF ITS OBTAINING Russian patent published in 2008 - IPC C01F5/00 C01F7/00 C01F17/00 

FIELD: chemistry.

SUBSTANCE: invention concerns synthetic lamellar hydroxides of the general formula Mg(_1·x)Me_x(OH)₂(CO₃)_x/2 •n H₂O, where a trivalent metal Me combines scandium and aluminium in the form of Sc_yAl_x-y, so that "y" is less than "x", and "x" is not more than 0.4. The method involves sedimentation of hydrotalcite-like compound from a solution of bivalent magnesium and trivalent scandium and aluminium salts by adding a sedimentation solution containing sodium hydroxide and cardonate, so than the general metal salt concentration in the solution prepared for sedimentation and containing chlorides or nitrates of Mg²⁺, Al³⁺ and Sc³⁺ metals, comprises not more than 3M, and general concentration of the sedimentation solution is not more than 3M. Substance batches for source and sedimentation solutions are calculated on the base of ion ratio in the solution: [Al³⁺ and Sc³⁺]:Mg²⁺:[OH"]:[CO₃ ²"] = 1:3:8:1. The sediment is thermostated in the mother solution at 96-98°C for two days, then it is cooled to the room temperature, the mother solution with lamellar hydroxide sediment is decanted and undergoes triple anion exchange with Na₂CO₃; after sedimentation the solution is decanted, and the sediment is flushed by distilled water till sodium ion is not detected. Afterwards the sediment is dried at 80 -105 C.

EFFECT: obtaining of a new hydrotalcite-like compound.

2 cl, 1 dwg, 1 ex