Preparation method of iron-tartaric acid-sodium complex
A technology of tartaric acid and complexes, which is applied in the field of preparation of complexes, can solve problems such as the influence of complexes on stability and waste of raw materials, and achieve the effects of simple preparation methods, small consumption of raw materials, and mild reaction conditions
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Embodiment 1
[0051] Add 3 kg of L-TA to the autoclave, H 2 O 3kg, heat up to 165°C, keep warm for 40h. Stop heating, stir and release the feed liquid after gradually cooling down. Detected content, meso form accounted for 45.6%, racemate accounted for 54.4%. Add 50% FeCl with stirring 3 Solution 6.5kg, after the complexation is uniform, add 50% NaOH solution 4.8kg under the condition of reflux with condensation. Stir evenly until a light green uniform iron-tartrate-sodium complex is formed, with a pH value of 2.2.
Embodiment 2
[0053] Add 4 kg of L-TA to the autoclave, H 2 O 2kg, heat up to 170°C, keep warm for 40h. Stop heating, stir and release the feed liquid after gradually cooling down. In the detection content, the meso form accounted for 51.7%, and the racemate accounted for 48.3%. Add 50% FeCl with stirring 3 Solution 9kg, after the complexation is uniform, add 50% NaOH solution 7.5kg under the condition of reflux with condensation. Stir evenly until a yellow-green uniform iron-tartrate-sodium complex is formed, with a pH value of 4.5.
Embodiment 3
[0055] Add 4 kg of L-TA to the autoclave, H 2 O 2kg, HCl (36% content) 0.5kg, heat up to 165°C, keep warm for 24h. Stop heating, stir and release the feed liquid after gradually cooling down. Detected content, meso form accounted for 58.4%, racemate accounted for 41.6%. Add 50% FeCl with stirring 3 Solution 9kg, after the complexation is uniform, add 50% NaOH solution 8.5kg under the condition of reflux with condensation. Stir evenly until a dark green uniform iron-tartrate-sodium complex is formed, with a pH value of 6.8.
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