| abstract |
patent summary: "nutrient composition for biological systems". The present invention relates to a composition comprising at least one mixed monometallic or metal phosphate type (m1 m2 m3 ... mx) 3 (po4) 2? h2o, being prepared or having been prepared by a) preparing an aqueous solution (i) comprising one or more mn, fe, co and / or ni as divalent cations, b) removing any solids present from the aqueous phosphoric acid solution (i), c) if the phosphate is a mixed metal phosphate and, in addition to the metals introduced into the solution in stage a), comprises other metals selected from (m1, m2, m3 ... mx) , at least one compound of at least one of the metals (m1, m2, m3 ... mx) is additionally added to the aqueous solution (i), d) providing an initial loading solution (ii) having a ph of 5 e) by measuring the aqueous solution (i) in the initial loading solution (ii) and simultaneously measuring in a basic aqueous alkali metal hydroxide solution such that the pH of the resulting mixture is kept in the range of 5 to 8, preferably 6 to 7, said phosphate precipitated, and the precipitate removed from the reaction solution. |