Method for preparing magnesium aspartate
A technology of magnesium aspartate and aspartic acid, which is applied in the field of chemistry, can solve the problems of unstable product quality, unstable product pH value, low efficiency and the like, so as to improve production efficiency and product quality, and product quality is unstable. , the effect of reducing production costs
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Embodiment 1
[0025] Add 1340 liters of purified water in the flask, add 20.1 kilograms of magnesium oxide under stirring, after all dissolve, add 133.1 kilograms of L-aspartic acid. After the addition is complete, reflux for 2 hours, and adjust the pH of the solution to 5.5-7.5 with magnesium oxide or aspartic acid. After filtration, the filtrate was evaporated under reduced pressure to remove about 80% of the solvent (water), and the obtained viscous substance was added to 1340 liters of ethanol at -40° C. under stirring, and a large amount of solids were formed while stirring. After adding, let stand for 1 hour. Centrifuge and dry under reduced pressure at 50°C to obtain 157.06 kg of magnesium L-aspartate, with a yield of 96.8%. The structure of the magnesium L-aspartate prepared in this example was confirmed, consistent with that reported in the literature.
Embodiment 2
[0027]Add 1400 milliliters of purified water in the flask, add 42.1 grams of magnesium carbonate under stirring, then slowly add 133.1 grams of L-aspartic acid. After the addition is complete, reflux for 2 hours, and adjust the pH of the solution to 5.5-7.5 with magnesium oxide or aspartic acid. After filtration, about 70% of the solvent (water) was evaporated from the filtrate under reduced pressure, and the obtained viscous substance was added into 1400 ml of ethanol at -80° C. under stirring, and a large amount of solids were formed while stirring. After adding, let stand for 1 hour. After centrifugation and vacuum drying under reduced pressure at 50°C, 157.38 g of magnesium L-aspartate was obtained, with a yield of 97.0%. The structure of the magnesium L-aspartate prepared in this example was confirmed, consistent with that reported in the literature.
Embodiment 3
[0029] Add 1200 milliliters of purified water in the flask, add 73 grams of magnesium bicarbonate under stirring, then slowly add 133.1 grams of L-aspartic acid. After the addition is complete, reflux for 2 hours, and adjust the pH of the solution to 5.5-7.5 with magnesium oxide or aspartic acid. After filtration, about 85% of the solvent (water) was evaporated from the filtrate under reduced pressure, and the obtained viscous substance was added into 1200 ml of -60°C ethanol with stirring, and a large amount of solids were formed while stirring. After adding, let stand for 1 hour. After centrifugation, vacuum drying under reduced pressure at 50°C, 157.71 g of magnesium L-aspartate was obtained, with a yield of 97.2%. The structure of the magnesium L-aspartate prepared in this example was confirmed, consistent with that reported in the literature.
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