IRON (II) PHTHALATE PROCESS Russian patent published in 2009 - IPC C07C67/03 C11C3/10 C11C3/00 

FIELD: chemistry.

SUBSTANCE: invention refers to advanced process for making iron (II) phthalate by direct reaction of iron or its alloy and carboxylic acid with air oxygen and stimulating iodine added in intensive mechanical mixing of the reaction mixture and crushed ferriferous material with using a blade paddle mixer, wherein phthalic acid content in primary charge is taken 1.55-2.0 mole/kg. Liquid phase solvent is n-butyl alcohol. Iron is presented with crushed grey cast iron in amount 30% of the other charge weight. Stimulating iodine is dosed in amount 0.075-0.17 mole/kg. Charge process proceeds as follows: solvent, acid, crushed grey cast iron, stimulating iodine. The same process is started and proceeds in a vertical beaded mill with a blade paddle mixer rotated at 960-1440 rpm in ratio of glass beads to charge 1:1 without air sparging, but even without blocking free contact of air to intensively mixed reaction mixture in the reactor within 35-50°C and current control by sampling method to accumulate iron (II) salt in amount 1.49-1.65 mole/kg. Then in continued mixing, the reaction zone is isolated from access for air. Nitrogen is delivered to sparging within 10-30 min. Thereafter mixing is stopped, reaction mixture suspension is separated from glass beads and unreacted cast iron particles and supplied to filtering. Deposit is washed 1-2 times with liquid phase solvent and delivered to vacuum drying, further to afterpurification. Filtrate and washing solvent are supplied back to the repeated process. Filtration and following end salt deposit handling are ensured in nitrogen environment.

EFFECT: improved process of iron phthalate.

18 ex, 2 tbl