Preparation method for continuous production of 1,2-pentanediol
A technology of pentanediol and pentene, which is applied in the field of synthesis and preparation of chemical products, can solve the problems of high cost, many hours of work, and non-continuous production, etc., and achieve the effects of increasing reaction rate, saving power consumption, and reducing reaction rate
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Embodiment 1
[0021] A method for continuous production of 1,2-pentanediol
[0022] Specific steps are as follows:
[0023] The pipeline reactor is equipped with two feed ports, feed port 1 and feed port 2, and there is a pipe reactor with stirring connected to feed port 1; formic acid (commercially available) 870kg, hydrogen peroxide (50%) 650kg was stirred and mixed evenly, and then passed into the pipeline through feed port 1, and 470kg of 1-pentene was fed into feed port 2, heated to 20°C-30°C, kept for 2 hours, and sampled for TLC (developing agent is ethyl acetate: Ethanol=4:1) detection, until the reaction of n-pentene is complete, the material is discharged from the outlet to the reactor for post-processing, and the raw material is continuously added from the feed port; during post-processing, it needs to be added when the temperature is raised to 40 ° C ~ 50 ° C Neutralize with sodium carbonate, then use industrial hydrochloric acid to adjust pH=7, bring to room temperature, add 8...
Embodiment 2
[0025] A method for continuous production of 1,2-pentanediol
[0026] Specific steps are as follows:
[0027] The pipeline reactor is equipped with two feed ports, feed port 1 and feed port 2, and there is a pipe reactor with stirring connected to feed port 1; formic acid (commercially available) 870kg, hydrogen peroxide (50%) 650kg was stirred and mixed evenly, then passed into the pipeline from feed port 1, and 470 kg of n-pentene was fed into feed port 2, heated to 20°C-30°C, kept for 2 hours, and sampled for TLC (developing agent is ethyl acetate: ethanol =4:1) detection, until the reaction of n-pentene is complete, release the material from the outlet to the reactor for post-processing, and continue to add raw materials from the feed port; for post-processing, add carbonic acid when the temperature is raised to 40 ° C ~ 50 ° C Sodium neutralization, then use industrial hydrochloric acid to adjust pH = 7, bring to room temperature, add 800kg ethyl acetate, stir for 30 min...
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