Amino acid type chelating agent as well as large-scale preparation method and application thereof
An amino acid type, chelating agent technology, applied in chemical instruments and methods, cyanide reaction preparation, preparation of organic compounds, etc., can solve the problems of many risk substances, ecological environment impact, operator's personal safety threat, etc., to achieve the process flow Simple, high reaction efficiency, low production cost
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Embodiment 1
[0063] The preparation method of embodiment 1 sodium methylamine diacetate
[0064] Feeding amount:
[0065] raw material name mass (g) Sodium Sarcosinate (40%) 277.5 sodium iodide 0.2 water 75 Chloroacetic acid (solid) 99.3 Sodium Hydroxide (50%) 104.0
[0066] Reaction equation:
[0067]
[0068] Specific experimental process:
[0069] Into a 500mL reaction flask, add 75.0kg of water, 99.3g of chloroacetic acid, 0.2g of sodium iodide, and 277.5g of sodium sarcosinate aqueous solution (m / m=40%) in sequence, stir at room temperature for 1.0h, and then heat up to 55.0 ℃, add 104.0g sodium hydroxide aqueous solution (m / m=50.0%) dropwise, and keep the pH value at 8.5-9.0. After all the addition is completed, continue stirring at this temperature for 30.0 minutes, and then raise the temperature to 90.0℃ for 4.0h of heat preservation reaction. After the reaction was completed, the temperature was cooled to room temperature, and a ...
Embodiment 2
[0071] Example 2 The preparation method of trisodium 2-ethylglycine diacetate
[0072] Feeding amount:
[0073] raw material name mass (g) 2-aminobutyric acid 103.1 sodium iodide 0.5 water 260.0 Chloroacetic acid (70%) 303.6 Sodium Hydroxide (50%) 342.0
[0074] Reaction equation:
[0075]
[0076] Specific experimental process:
[0077] Into a 1000L three-necked reaction flask, sequentially add 260.0g of water, 103.1g of 2-aminobutyric acid, 0.5g of sodium iodide, stir at room temperature for 1.0h, then raise the temperature to 40.0°C, and dropwise add 342.0g of sodium hydroxide aqueous solution (m / m=50.0%), after 5 minutes, start to drop 303.6g aqueous solution of chloroacetic acid (m / m=70%), keep the temperature at 40-50°C, after about 5.0h all added, continue to stir at this temperature for 5h, then Raise the temperature to 92.0°C for 3.0 hours of heat preservation reaction. After the reaction, cool down to room temperat...
Embodiment 3
[0079] The preparation method of embodiment 3 beta-alanine diacetate trisodium
[0080] Feeding amount:
[0081] raw material name mass (g) beta-alanine 89.1 sodium iodide 0.2 water 260.0 Chloroacetic acid (70.0%) 303.6 Sodium Hydroxide (50%) 342.0
[0082] Reaction equation:
[0083]
[0084] Specific experimental process:
[0085] Into a 1000mL three-neck flask, add 250g of deionized water, 89.1g of β-alanine, and 0.2g of sodium iodide in sequence, turn on magnetic stirring, and dropwise add lye (m / m=50.0%) to adjust the pH value to 9.0-9.5, Stir at this temperature for 1.0h, then raise the temperature to 55.0°C, while adding dropwise the remaining aqueous sodium hydroxide solution (m / m=50.0%), and after 5 minutes, add dropwise 212.6g aqueous solution of chloroacetic acid (m / m=70.0%) ), keep the temperature at 45.0-50.0°C, complete the addition in about 4.5h, continue to stir at this temperature for 5.0h, then raise the tem...
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