A kind of extraction method of 1,5-pentanediamine
A technology of pentamethylenediamine and pentamethylenediamine salt, which is applied in the field of extracting 1,5-pentanediamine, can solve the problems of high cost, low recovery rate, complicated process, etc., and achieve improved conversion rate, increased yield, and simplified process The effect of steps
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Embodiment 1
[0093] The 1,5-pentanediamine concentration of 1,5-pentamethylenediamine was determined to be 15.1% in the concentrated solution of 1,5-pentamethylenediamine sulfatase conversion liquid with 1000 kg of lysine decarboxylase cells. Add 110kg of calcium oxide powder (content above 95%), control the temperature at about 90°C, stir thoroughly for 180 minutes, and then gradually send the resulting mixed solution system into figure 1 The combination of pentamethylenediamine extraction devices shown in the figure has a rotating speed of 20rpm, a vacuum degree of -0.09~-0.08Mpa is controlled, a heat conduction oil temperature is 200°C, and evaporated gas condensate is collected. The final yield of 1,5-pentanediamine was 95.6%, and loose solid powder remained in the paddle vacuum drying device without agglomeration and wall formation.
Embodiment 2
[0095] The 1,5-pentanediamine concentration of 600kg of the 1,5-pentanediamine carbonatase conversion liquid concentrate with lysine decarboxylase cells was determined to be 25%. Add 102kg of calcium oxide powder (content above 95%), control the temperature at 80-90°C, fully stir for 120 minutes, then gradually send the resulting mixed solution system into a rake-type vacuum dryer (ZPG-1000) to heat, stir and evaporate at a speed of 12rpm , control the vacuum degree -0.095~-0.09Mpa, the temperature of the material in the barrel is 170°C±10°C, and collect the evaporated gas condensate. The final yield of 1,5-pentanediamine was 93.9%. Loose solid powder remains in the rake vacuum dryer without agglomeration and wall formation.
Embodiment 3
[0097] The mixed solution of 600kg 1,5-pentamethylenediamine phosphate and 1,5-pentamethylenediamine hydrochloride enzymatic conversion solution (the molar ratio of pentamethylenediamine contained in the two salts is 1:1), and the determination of 1,5 - Total concentration of pentamethylenediamine 31%. According to the effective molar concentration of 1,5-pentamethylenediamine and magnesium hydroxide 1:1.1, add magnesium hydroxide powder (content above 98%), control the temperature at 80-90°C, stir thoroughly for 120 minutes, and then gradually mix the obtained mixed solution system feed into figure 1 The combination of pentamethylenediamine extraction devices shown, the speed is 15rpm, the vacuum degree is controlled to -0.095Mpa, the temperature of the material in the barrel is 170°C±10°C, and the evaporated gas condensate is collected. The final yield of 1,5-pentanediamine was 92%, and loose solid powder remained in the rake vacuum dryer without agglomeration and wall form...
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