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ChemicalBook CAS DataBase List Epichlorohydrin
106-89-8

Epichlorohydrin synthesis

13synthesis methods
Epichlorohydrin can be prepared from 1,3-dichloropropanol-2, 2,3- dichloropropanol-1, or allyl chloride. Commercially it is prepared as an intermediate in glycerol synthesis via alkaline hydrolysis of glycerol dichlorohydrin. Both come from allyl chloride. Epichlorohydrin reacts with monohydric alcohols to give ethers by opening the oxide ring. It will react with ethers, aldehydes, ketones, organic acids and amines to give a wide variety of useful syntheses.
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Yield:106-89-8 99%

Reaction Conditions:

with Cumene hydroperoxide at 60 - 120; under 7500.75 Torr;Temperature;Pressure;

Steps:

4

Using the process shown in Figure 1, 6 reactors are used in series, fresh allyl chloride having a flow rate of 0.5 kg / hr and circulating allyl chloride with 3.5 kg/hr from the top of the reactor 1. Homogeneous molybdenum-based catalyst having a flow rate of 26.7 g/hr from the top of the reactor 1. A cumene solution containing 50% cumene hydroperoxide was mixed with 1 kg / hr of cumene having flow rate of 2 kg / hr from the top entrance of the reactor 6, respectively. The weight ratio of molybdenum to cumene hydroperoxide is 0.0004, allyl chloride: cumene hydroperoxide = 8 (molar ratio). The reaction temperature of the reactor 1 was 60°C, the reaction pressure was 1 MPa, and the conversion of cumene hydroperoxide was 40%. The reaction temperature of the reactor 2 was 80°C, the reaction pressure was 1 MPa, and the conversion of cumene hydroperoxide was 55%. The reaction temperature of the reactor 3 was 90°C, reaction pressire 1 MPa and the conversion of cumene hydroperoxide was 60%. The reaction temperature of the reactor 4 was 100 ° C, reaction pressure was 1MPa, and the conversion of cumene hydroperoxide was 80%. The reaction temperature of the reactor 5 was 110°C, reaction pressure was 1 MPa and the conversion of cumene hydroperoxide was 95%. The reaction temperature of the reactor 6 was 120°C, reaction pressure was 0.1 MPa and the conversion of cumene hydroperoxide was 100%. The streams of allyl chloride, cumene, epichlorohydrin and α,α-dimethylbenzyl alcohol from the bottom of the reactor 6 are separated by distillation column 1, distillation column II and distillation column III, respectively. The operating conditions of the distillation column I were as follows: the number of plates was 50, the pressure was 2 MPa, the column top temperature was 60°C, and the bottom temperature was 150°C. The operating conditions of the distillation column II were 50 plates, a pressure of 2 MPa, a top temperature of 100°C and a bottom temperature of 250°C. The operating conditions of the distillation column III were 50 plates, a pressure of 4 MPa, a top temperature of 130°C, and a bottom temperature of 350°C. The resulting epichlorohydrin product had a flow rate of 0.67 kg / hr, the selectivity of epichlorohydrin to cumene hydroperoxide was 99%, the conversion of cumene hydroperoxide was 100%. The yield of oxychloropropane was 99%.

References:

CN105272946,2016,A Location in patent:Paragraph 0074-0087

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