Method for extraction separation of dichloropropanol from dichloropropanol hydrochloric water solution
A technology of dichloropropanol hydrochloric acid and dichloropropanol, applied in chemical instruments and methods, separation/purification of hydroxyl compounds, preparation of organic compounds, etc., can solve the problem of purification of hydrochloric acid solution without dichloropropanol Process and other issues, to achieve the effect of reducing energy consumption and waste water discharge, simple and convenient operation, and increasing production capacity
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Embodiment 1
[0034] Pump in dichloropropanol hydrochloric acid aqueous solution 1000g / h from bottom to top in the middle and lower part of the extraction tower; Mixing and separation inside the tower, the upper part of the extraction tower obtains the water phase, and the lower part of the extraction tower obtains the oil phase, which is continuously fed and withdrawn. The oil phase composition and water phase composition are shown in the attached table, and the total extraction yield is 97.35%. The dichloropropanol in the oil phase is distilled at atmospheric pressure, and the extracted dichloromethane is used for extraction, and the obtained dichloropropanol is desolvated and enters the saponification reaction to generate epichlorohydrin.
Embodiment 2
[0036] Operation is the same as in Example 1, the extraction agent uses chloroform, the feed rate of dichloropropanol hydrochloric acid aqueous solution is 1000g / h, and the feed rate of chloroform is 1000g / h, and the oil phase composition and the water phase composition are shown in the attached table. The extraction yield of chloropropanol is 95%.
Embodiment 3
[0038] The operation is the same as in Example 1, the extraction agent uses dichloroethane, the feed rate of dichloropropanol hydrochloric acid aqueous solution is 1000g / h, and the feed rate of dichloroethane is 1000g / h, and the oil phase composition and water phase composition are shown in the attached table , The extraction yield of dichloropropanol is 97%.
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