Preparation method of choline bicarbonate and carbonate
A technology of choline bicarbonate and carbonate, applied in chemical instruments and methods, preparation of organic compounds, preparation of amino compounds, etc., to achieve the effects of mild reaction conditions, good stability, and wide application value
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Embodiment 1
[0024] Embodiment 1: a kind of preparation of choline bicarbonate
[0025] Add 98.5kg of 30% trimethylamine aqueous solution into the reaction kettle, feed 22kg of carbon dioxide, stir while adding, the pressure is less than 2kgf / cm 2 , the cooling water was cooled to 10°C, and the reaction was kept for 2 hours to obtain trimethylammonium bicarbonate. Continue to add 22.22kg of liquefied oxirane with a concentration of 99% in the reactor, cool to 10°C, generate choline bicarbonate, filter, and obtain a 57% choline bicarbonate aqueous solution with a yield of 98.1 %.
Embodiment 2
[0026] Embodiment 2: a kind of preparation of choline carbonate
[0027] Add 197kg of 30% trimethylamine aqueous solution into the reaction kettle, feed 22kg of carbon dioxide, stir while adding, the pressure is less than 2kgf / cm 2 , temperature 10 ℃, insulation reaction 2h, to obtain trimethylammonium carbonate. Continue to add 44.44kg of liquefied oxirane with a concentration of 99% in the reactor, cool to 20°C, generate choline carbonate, filter, and obtain a 51% aqueous solution of choline carbonate with a yield of 98.4 %.
Embodiment 3
[0028] Embodiment 3: a kind of preparation of choline bicarbonate
[0029] Add 295.55kg of 40% trimethylamine aqueous solution into the reaction kettle, feed 88kg of carbon dioxide, stir while adding, the pressure is less than 2kgf / cm 2 , temperature 40 ° C, heat preservation reaction 2h, to obtain trimethylammonium bicarbonate. Continue to add 88.88kg concentration to be 99% liquefied oxirane in reactor, be cooled to 30 ℃, generate choline bicarbonate, filter, obtain concentration and be 70% choline bicarbonate aqueous solution, yield is 98.5% %.
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