SOLUTIONS OF TRI-ALKALI SALTS OF AMINOCARBOXYLIC ACIDS, PRODUCTION AND USE THEREOF Russian patent published in 2019 - IPC C07C227/26 C07C229/16 C11D3/33 

FIELD: chemistry.

SUBSTANCE: invention relates to an aqueous solution for producing detergent compositions for washing and detergent compositions for purifiers, which contains 60.5 to 75 wt. % of a mixture of tri-alkali salts of L- and D-enantiomers of methylglycine diacetic acid (MGDA). Said mixture preferably contains the corresponding L-isomer with enantiomeric excess(-es) ranging from 10 to 86.2 %. Said tri-alkali salts have general formula (I), where x ranges from zero to 2.9. Invention also relates to a method of producing said aqueous solution, use thereof for preparing detergent compositions for washing and detergent compositions for purifiers, including in completely or partially neutralized form, and to a mixture of tri-alkali salts of L- and D-enantiomers of MGDA. [CH₃-CH(COO)-N(CH₂-COO)₂]K_3-xNa_x (I).

EFFECT: disclosed aqueous solution is highly concentrated and has good stability.

14 cl, 1 tbl, 2 ex