Method for dehydrating polyether initiator
A starter and polyether technology, applied in the chemical field, can solve the problems of restricting the application and development of polyether, high water content of starter, affecting the quality of polyether, etc., achieve significant market application value, high dehydration efficiency, and improve dehydration efficiency effect
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Embodiment 1
[0023] Add 500Kg glycerin and 10KgNaOH into the reactor, control the temperature to 110°C, pressure to -0.090MPa, turn on the circulation pump, and control the circulation volume to 20m 3 / h, the initiator is atomized in the reactor through the spray system to form atomized particles, the average particle size of the droplets is 500um; dry nitrogen is blown from the bottom of the reactor (purity is 99.95%, pressure dew point -52°C) , the nitrogen flow rate is 3.0m 3 / h, use nitrogen to take away the moisture in the initiator to realize the dehydration of the initiator. Dehydrate for 30 minutes, and take a sample to detect that the water content in the initiator is 0.05%.
Embodiment 2
[0025] Add 500Kg propylene glycol and 10KgKOH to the reactor, control the temperature at 100°C, the pressure at -0.080MPa, turn on the circulation pump, and control the circulation volume at 25m 3 / h, the initiator is atomized in the reactor through the spray system to form atomized particles, the average particle size of the droplets is 400um; dry nitrogen is blown from the bottom of the reactor (purity is 99.97%, pressure dew point -55 ℃) , the nitrogen flow rate is 2.0m 3 / h, use nitrogen to take away the moisture in the initiator to realize the dehydration of the initiator. Dehydration was performed for 30 minutes, and the water content in the initiator was detected by sampling to be 0.03%.
Embodiment 3
[0027] Add 500Kg triethanolamine and 6KgNaOH into the reactor, control the temperature at 130°C, the pressure at -0.092MPa, turn on the circulation pump, and control the circulation volume at 22m 3 / h, the initiator is atomized in the reactor through the spray system to form atomized particles, the average particle size of the droplets is 600um; dry nitrogen is blown from the bottom of the reactor (purity is 99.93%, pressure dew point -53°C) , the nitrogen flow rate is 3.5m 3 / h, use nitrogen to take away the moisture in the initiator to realize the dehydration of the initiator. Dehydration was performed for 30 minutes, and the water content in the initiator was sampled and detected to be 0.06%.
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