POWDER COMPOSITIONS OF COMPLEX BETWEEN ACID AND METAL AND METHOD FOR PREPARING SAME Russian patent published in 2018 - IPC C07C227/18 C07C229/76 C07C319/20 C07C323/52 C07C323/58 C08B37/04 C08B37/06 B01J2/04 A23K20/142 A23K20/147 A23K20/163 A23K50/75 

FIELD: agriculture.

SUBSTANCE: invention relates to a particle, essentially as a homogeneous sphere or a fraction of a homogeneous sphere, for use as a feed additive. Disclosed particle consists essentially of a complex, in particular a salt, between an acid or a corresponding anion and at least one metal or a corresponding metal cation. Said acid or corresponding anion is selected from a group consisting of 2-hydroxy-4-methylthiobutanoic acid (HMTBA), and the corresponding anions, and said metal or metal cation is Ca or the corresponding cation Ca²⁺. Said particle contains an amorphous fraction whose mass is at least 50 %, in particular at least 70 %, more particularly at least 90 % of the total weight of said particle, wherein the weight ratio of said acid, which is not part of the complex, or anion and/or at least one of said metal or cation, which are not part of the complex, to the total weight of said particle is less than 20 % and varies, in particular, from 0 to 5 %, more specifically from 0 to 1 %. Invention also relates to a powdery particle composition and a process for its preparation.

EFFECT: disclosed particle has better dissolution kinetics and bioavailability.

18 cl, 6 dwg, 15 ex, 7 tbl