78-89-7Relevant articles and documents
The liquid containing β - halohydrin of the isolation of the product of the method
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Paragraph 0103-0106; 0115-0122; 0131, (2019/05/16)
The present invention relates to a liquid containing β - process for the isolation of the product of the method, the method comprises: a, β - halo containing liquid product after mixing with the organic extractant extraction, the aqueous phase and the oil phase obtained; b, a distillation step obtained states the oil phase, to obtain the β - halohydrin; the organic extractant comprises a 1st component and 2nd component, the 1st group is divided into not substituted alkanes and/or not substituted olefin, the 2nd group [...] substituted alkanes and/or Cl substituted olefin, the 1st component 2nd component and the molar ratio of 1: (0.05 - 3). The method of simple process flow, low energy consumption, and can separate to obtain a high purity of the halohydrin β -.
Method for preparing halogen propanol and epoxypropane
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Paragraph 0086; 0087-0099; 0104; 0105; 0112-0115; 0118-0130, (2017/05/19)
The invention provides a method for preparing halogen propanol. The method comprises the following steps (1) halogen alcoholization: adding halogen hydride, H2O2, propylene and an HTS molecular sieve into a reaction device, and carrying out halogen alcoholization reaction to obtain the halogen propanol. The invention also provides a method for preparing epoxypropane with a halogenohydrin method. The method comprises the following steps: (1) halogen alcoholization: adding halogen hydride, H2O2, propylene and an HTS molecular sieve into the reaction device, and carrying out the halogen alcoholization reaction to obtain halogen propanol; (2) saponification: carrying out saponification reaction on halogen propanol and a hydroxide of alkali metal in step (1), and separating to obtain the epoxypropane and alkali halide metal salt; optionally (3) electroosmosis: carrying out bipolar membrane electroosmosis on the alkali halide metal salt obtained in step (2) to obtain the hydroxide of alkali metal and the halogen hydride. According to the methods, the halogen propanol or the epoxypropane can be prepared at extremely high selectivity and yield, and the discharging of waste water and waste residues can be drastically lowered.
Dehydrochlorination of 2-chloroethanol, 2-chloro-1-propanol, 1-chloro-2-propanol, 2-chloro-2-methyl-1-propanol and 1-chloro-2-methyl-2- propanol
Pihlaja, Kalevi,Kiuru, Marja-Leena,Sippola, Anne
, p. 120 - 133 (2013/09/24)
The reactions between a few 1,2-chlorohydrins and sodium hydroxide have been studied and shown to involve a two-step nucleophilic elimination of hydrogen chloride. The data are given for the slow rate-determining step of 2-chloroethanol 1, 2-chloro-1-propanol 2, 1-chloro-2- propanol 3, 2-chloro-2-methyl-1-propanol 4 and 1-chloro-2-methyl-2-propanol 5. Compounds 4 and 5 gave 2-methyl-1,2-propanediol as the final product instead of oxiranes given by compounds 13. In contrast to some earlier reports the mere water reaction was shown to be almost negligible. In constant ionic strength the base concentration had no effect on the rates whereas at different base concentrations (0.0500.250 mol dm-3) alone the rate of alkaline dehydrochlorination of 1 clearly decreased (103k2, dm 3 mol-1 s-1: 10.0-8.7, respectively). The rate of 2 at constant base concentration (0.010 mol dm-3) and at different ionic strengths (dm3 mol-1: 0.010-0.500) decreased also (103k2, dm3 mol-1 s-1: 76-65, respectively) indicating that the decrease is mainly due to the change in the ionic strength also in the former case. ARKAT-USA, Inc.
