Abstract:
The invention relates to a method for producing transition metal carbonates having an average particle diameter in the range from 6 to 19 µm (D50), characterized in that at least one solution of at least one transition metal salt is combined with at least one solution of at least one alkali metal carbonate or alkali metal hydrogen carbonate in a stirring vessel, whereby an aqueous suspension of transition metal carbonate is produced. The invention is also characterized in that, in at least one further compartment, a mechanical power in the range from 50 to 10000 W/I is continuously applied to a fraction of the suspension, with respect to the fraction of the suspension, and that the fraction is subsequently fed back into the stirring vessel.
Abstract:
The present invention relates to a process for the preparation of compounds of general formula (I) Lia-bM1 bQ1-cM2 cPd-eM3 eOx (l), wherein Q has the oxidation state +2 and M1, M2, M3, a, b, c, d, e and x are: Q: Fe, Mn, Co, Ni, M1 : Na, K, Rb and/or Cs, M2: Mg, Al, Ca, Ti, Co, Ni, Cr, V, Fe, Mn, wherein Q and M2 are different from each other, M3: Si, S, F a: 0.8 - 1.9, b: 0 - 0.3, c: 0 - 0.9, d: 0.8 - 1.9, e: 0 - 0.5, x: 1.0 - 8, depending on the amount and oxidation state of Li, M1, M2, P, M3, wherein compounds of general formula (I) are neutrally charged, comprising the following steps (A) providing a mixture comprising at least one lithium-comprising compound, at least one Q-comprising compound, in which Q has at least partially an oxidation state higher than +2, and at least one M1-comprising compound, if present, and/or at least one M2-comprising compound, if present, and/or least one M3-comprising compound, if present, and at least one reducing agent which is oxidized to at least one compound comprising at least one phosphorous atom in oxidation state +5, and (B) heating the mixture obtained in step (A) at a temperature of 100 to 500 °C and at an autogeneous pressure to reduce Q to oxidation state +2 and to obtain a compound of general formula (I).
Abstract:
The invention relates to a method for producing transition metal hydroxides with an average particle diameter ranging from 6 to 12 µm (D50). The invention is characterized in that at least one solution of at least one transition metal salt is combined with at least one solution of at least one alkali metal hydroxide in a mixing vessel, thereby producing an aqueous suspension of transition metal hydroxide, and a mechanical energy output is continuously introduced into a fraction of the suspension in each of at least one additional compartment, the mechanical energy output ranging from 50 to 10,000 W/l with respect to said fraction of the suspension. The fraction is then returned into the mixing vessel.