Method for separating and purifying glycine by using N, N-dibutyl ethanolamine
A technology of glycine and ethanolamine, applied in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxy compounds, etc., can solve problems such as difficulty in product separation, and achieve the effects of green operation process, convenient large-scale operation, and convenient addition.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0042] Dissolve 4 g of crude glycine in 10 mL of water, stir magnetically at room temperature until completely dissolved, to obtain a solution of crude glycine. Take 20ml of N,N-dibutylethanolamine and add it to the crude glycine solution, pass CO for 12h at 5°C 2 . The solid and liquid were obtained by centrifugation, the solid was washed three times with ethanol, and dried in an oven at 100 °C for 8 h to obtain a fine glycine product.
[0043] The liquid obtained by centrifugation was heated at 60 °C for 6 h, and liquid-liquid separation was performed. The upper layer was recovered as oil phase N,N-dibutylethanolamine, and ammonia water was added to the lower water phase of the mother liquor. The molar ratio of the water phase and the ammonia water was 1:3, and the liquid - Liquid separation, recovery of the upper oil phase N,N-dibutylethanolamine.
[0044] The yield of the above method for separating and purifying glycine is 80%, and the recovery rate of N,N-dibutylethano...
Embodiment 2
[0046] Dissolve 4 g of crude glycine in 10 mL of water, stir magnetically at room temperature until completely dissolved, to obtain a solution of crude glycine. Take 20ml of N,N-dibutylethanolamine and add it to the crude glycine solution, pass CO for 12h at 10°C 2 . The solid and liquid were obtained by centrifugation, the solid was washed three times with ethanol, and dried in an oven at 100 °C for 8 h to obtain a fine glycine product.
[0047] The liquid obtained by centrifugation was heated at 60 °C for 6 h, and liquid-liquid separation was performed. The upper layer was recovered as oil phase N,N-dibutylethanolamine, and ammonia water was added to the lower water phase of the mother liquor. The molar ratio of the water phase and the ammonia water was 1:3, and the liquid - Liquid separation, recovery of the upper oil phase N,N-dibutylethanolamine.
[0048] The yield of separation and purification of glycine by the above method is 76%, and the recovery rate of N,N-dibutyl...
Embodiment 3
[0050] Dissolve 4 g of crude glycine in 10 mL of water, stir magnetically at room temperature until completely dissolved, to obtain a solution of crude glycine. Take 20ml of N,N-dibutylethanolamine and add it to the crude glycine solution, pass CO for 12h at 15°C 2 . The solid and liquid were obtained by centrifugation, the solid was washed three times with ethanol, and dried in an oven at 100 °C for 8 h to obtain a fine glycine product.
[0051] The liquid obtained by centrifugation was heated at 60 °C for 6 h, and liquid-liquid separation was performed. The upper layer was recovered as oil phase N,N-dibutylethanolamine, and ammonia water was added to the lower water phase of the mother liquor. The molar ratio of the water phase and the ammonia water was 1:3, and the liquid - Liquid separation, recovery of the upper oil phase N,N-dibutylethanolamine.
[0052] The yield of the above method for separating and purifying glycine is 69%, and the recovery rate of N,N-dibutylethan...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More