METHOD OF PRODUCING MALONATE AND MANGANESE (II) SUCCINATE Russian patent published in 2009 - IPC C07C51/41 C07C55/10 C07C55/08 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing malonate or manganese (II) succinate, which can be used in different areas of chemical practice, in analytical control and scientific research, through direct reaction of a metal and its dioxide with carboxylic acid in the presence of an organic solvent and stimulating iodine additive in a vertical type bead mill with a high-speed mixer and glass beads as grinding medium, where manganese, its dioxide and carboxylic acid in the initial load are taken in molar ratio 1+x):1:(2+x) so as to obtain (2+x)m moles of salt, where x in the given molar ratio of reagents equals 0.4±0.1 for amber acid and 1.0±0.1 for malonic acid, and m is the number of moles of manganese dioxide in the load; iodine is taken in amount of 0.05 mol/kg of the reaction mixture after loading organic solvent and acid, but before loading manganese dioxide and metal. Total mass of acid, metal and its dioxide lies between 15 and 25% of the mass of the initial load, and ratio of mass of beads to mass of the load is 1:1. The process is started at room temperature and carried out under forced cooling conditions at temperature ranging from room temperature to 40°C while controlling by taking samples until exhaustion of all loaded reagents into the target salt, after which the process is stopped. The suspension of the final reaction mixture is separated from the beads and filtered. The product residue is washed with a liquid phase solvent and taken for purification from trace metal and its dioxide through recrystallisation, and the filtrate and washing solvent are returned to the repeated process.

EFFECT: process takes place at acceptable rates and ends with virtually complete consumption of all loaded reagents.

2 cl, 19 ex